
{"id":23472,"date":"2025-07-01T13:55:44","date_gmt":"2025-07-01T12:55:44","guid":{"rendered":"https:\/\/www.tobermore.co.uk\/professional\/?p=23472"},"modified":"2025-08-18T11:35:56","modified_gmt":"2025-08-18T10:35:56","slug":"design-and-specification-of-permeable-paving-by-loading-categories","status":"publish","type":"post","link":"https:\/\/www.tobermore.co.uk\/professional\/blog\/design-and-specification-of-permeable-paving-by-loading-categories\/","title":{"rendered":"Design and specification of permeable paving by loading categories"},"content":{"rendered":"<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">Loading categories describe the type of traffic and loading <\/span><span data-contrast=\"auto\">that <\/span><span data-contrast=\"none\">an area of permeable block paving is expected to <\/span><span data-contrast=\"auto\">withstand<\/span><span data-contrast=\"none\">. These range from light domestic applications through to heavy traffic areas with up to 1000 large HGVs per week.\u00a0\u00a0<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">The <\/span><a href=\"https:\/\/www.tobermore.co.uk\/professional\/product-category\/permeable-paving\/\"><span data-contrast=\"none\">permeable paving <\/span><\/a><span data-contrast=\"none\">specification must provide sufficient support to meet the requirements of each loading category. This requires particular attention to be paid to the sub<\/span> <span data-contrast=\"none\">base and capping layers that support the permeable paving.\u00a0<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">Most permeable pavement designs require a full engineering approach. However, at the project appraisal stage, having standard solutions available is usually suitable. In this blog<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> we will first look at the loading categories for permeable paving. Then we will describe some standard solutions of sub base and capping layers for different loading categories.<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<h2 data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><b><span data-contrast=\"none\">What are the loading categories used for permeable paving?<\/span><\/b><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/h2>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">The loading categories used for permeable paving design<\/span><span data-contrast=\"auto\">s <\/span><span data-contrast=\"none\">are listed in the table below. They range from Category A, the lowest loading category<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> through to Category F<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> describing the highest<\/span><span data-contrast=\"auto\">:<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><div class=\"table-responsive\">\n<table id=\"tablepress-76\" class=\"tablepress tablepress-id-76 table table-bordered fftable table-discontinued\">\n<thead>\n<tr class=\"row-1 odd\">\n\t<th class=\"column-1\">Category\/Application <\/th><th class=\"column-2\">No. of standard axles <\/th><th class=\"column-3\">Traffic Guide <\/th><th class=\"column-4\">Application <\/th>\n<\/tr>\n<\/thead>\n<tbody class=\"row-hover\">\n<tr class=\"row-2 even\">\n\t<td class=\"column-1\">A\/domestic <\/td><td class=\"column-2\">0 <\/td><td class=\"column-3\">No large HGV <\/td><td class=\"column-4\">\u2022 Patios <br \/>\n\u2022 Private drives <br \/>\n\u2022 Decorative features <br \/>\n\u2022 Enclosed playgrounds <br \/>\n\u2022 Footways with zero overrun  <\/td>\n<\/tr>\n<tr class=\"row-3 odd\">\n\t<td class=\"column-1\">B\/car parking <\/td><td class=\"column-2\">100<\/td><td class=\"column-3\">Emergency vehicles only <\/td><td class=\"column-4\">\u2022 Car parking bays and aisles <br \/>\n\u2022 Railway station platforms  <br \/>\n\u2022 External car showrooms <br \/>\n\u2022 Sports stadium pedestrian routes <br \/>\n\u2022 Footways with occasional overrun <br \/>\n\u2022 Private drives <br \/>\n\u2022 Footway crossover <\/td>\n<\/tr>\n<tr class=\"row-4 even\">\n\t<td class=\"column-1\">C\/pedestrian <\/td><td class=\"column-2\">0.015 msa <\/td><td class=\"column-3\">1 large HGV\/week <\/td><td class=\"column-4\">\u2022 Town\/city pedestrian street <br \/>\n\u2022 Nursery access <br \/>\n\u2022 Parking areas to residential development <br \/>\n\u2022 Hotel parking <br \/>\n\u2022 Garden centre external displays <br \/>\n\u2022 Cemetery<br \/>\n\u2022 Airport car park (no bus pick-up) <br \/>\n\u2022 Sports centre <\/td>\n<\/tr>\n<tr class=\"row-5 odd\">\n\t<td class=\"column-1\">D\/shopping<\/td><td class=\"column-2\">0.15 msa <\/td><td class=\"column-3\">10 large HGV\/week <\/td><td class=\"column-4\">\u2022 Retail development delivery access route <br \/>\n\u2022 School\/college access route <br \/>\n\u2022 Office block delivery route <br \/>\n\u2022 Garden centre delivery route <br \/>\n\u2022 Deliveries to small residential development  <br \/>\n\u2022 Fire station yard <br \/>\n\u2022 Airport car park with bus to terminal <br \/>\n\u2022 Sports stadium access route\/forecourt <\/td>\n<\/tr>\n<tr class=\"row-6 even\">\n\t<td class=\"column-1\">E\/commercial <\/td><td class=\"column-2\">1.5 msa <\/td><td class=\"column-3\">100 large HGV\/week <\/td><td class=\"column-4\">\u2022 Industrial premises <br \/>\n\u2022 Lightly trafficked public roads <br \/>\n\u2022 Light industrial development  <br \/>\n\u2022 Mixed retail\/industrial development <br \/>\n\u2022 Town square <br \/>\n\u2022 Footway with regular overrun <br \/>\n\u2022 Airport landside  <\/td>\n<\/tr>\n<tr class=\"row-7 odd\">\n\t<td class=\"column-1\">F\/heavy traffic <\/td><td class=\"column-2\">15 msa <\/td><td class=\"column-3\">1000 large HGV\/week <\/td><td class=\"column-4\">\u2022 Main road <br \/>\n\u2022 Distribution centre <br \/>\n\u2022 Bus station (bus every 5 minutes) <br \/>\n\u2022 Roundabout  <br \/>\n\u2022 Bus lane  <\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div><\/p>\n<h2 data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><b><span data-contrast=\"none\">What factors affect the design of the permeable paving sub<\/span><\/b> <b><span data-contrast=\"none\">base and capping layers?<\/span><\/b><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/h2>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"auto\">Two key factors affect<\/span><span data-contrast=\"none\"> permeable paving specification, <\/span><span data-contrast=\"auto\">particularly<\/span><span data-contrast=\"none\"> the design of the sub<\/span> <span data-contrast=\"none\">base and capping layers. One is the strength of the soil<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> and the other is the loading category <\/span><span data-contrast=\"auto\">that <\/span><span data-contrast=\"none\">the permeable paving is required to support.<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<h2 data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><b><span data-contrast=\"none\">The influence of CBR on permeable paving sub<\/span><\/b> <b><span data-contrast=\"none\">base and capping layers\u00a0<\/span><\/b><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/h2>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">The strength of the soil and its stiffness can be measured by its CBR (California Bearing Ratio). Prior to project commencement, it is advised that all sites are independently inspected and assessed by a suitable qualified engineer to establish the CBR of the subgrade present.<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">If the CBR figure is 5% or greater, capping layers \u2013 these are layers of material introduced to improve the supporting strength of the permeable paving design \u2013 are not required.\u00a0<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<h2 data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><b><span data-contrast=\"none\">The influence of loading categories on<\/span><\/b> <b><span data-contrast=\"none\">permeable paving sub<\/span><\/b> <b><span data-contrast=\"none\">bases and capping layers<\/span><\/b><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/h2>\n<p><span data-contrast=\"none\">The loading categories we covered in the earlier table may require capping thickness to be adjusted upward<\/span><span data-contrast=\"auto\">s <\/span><span data-contrast=\"none\">to ensure that a firm working platform can be achieved<\/span><span data-contrast=\"auto\">, capable of sustaining<\/span><span data-contrast=\"none\"> loads from construction traffic without deforming excessively. It should also offer sufficient reaction to allow the overlying materials to be fully compacted. All pavements, including permeable solutions<\/span><span data-contrast=\"auto\">, <\/span><span data-contrast=\"none\">must meet the requirements of BS7533 Part 3 in terms of installation.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h2 data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><b><span data-contrast=\"none\">What are examples of standard designs of sub<\/span><\/b> <b><span data-contrast=\"none\">bases and capping layers for permeable paving?<\/span><\/b><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/h2>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">We will now illustrate some standard permeable paving designs to show how CBR and loading category influence the specification of permeable paving, particularly <\/span><span data-contrast=\"auto\">the <\/span><span data-contrast=\"none\">thickness of the capping and sub base layers.<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">The thicknesses of coarse graded aggregate in the examples will be suitable for the traffic conditions shown. In the case of attenuation designs<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> where water is contained to be released later into drainage systems<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> the aggregate should be thick enough to meet the attenuation requirements. However, a site-specific hydraulic analysis should be carried out.<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-bottom=\"0px none #000000\" data-ccp-padding-bottom=\"0px\" data-ccp-border-between=\"0px none #000000\" data-ccp-padding-between=\"0px\"><span data-contrast=\"none\">In the case of infiltration designs<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> where water slowly drains from the sub base into the ground<\/span><span data-contrast=\"auto\">,<\/span><span data-contrast=\"none\"> there is usually no need to check hydraulic capacity. However, a check must be made on the infiltration capacity of the ground. The ground must be proven to accept 20mm of water in one hour. This figure will have to be scaled up if the pavement is infiltrating water draining towards it from impermeable paving or from downpipes.<\/span><span data-ccp-props=\"{&quot;335572071&quot;:0,&quot;335572072&quot;:0,&quot;335572073&quot;:0,&quot;335572075&quot;:0,&quot;335572076&quot;:0,&quot;335572077&quot;:0,&quot;335572079&quot;:0,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;335572083&quot;:0,&quot;335572084&quot;:0,&quot;335572085&quot;:0,&quot;335572087&quot;:0,&quot;335572088&quot;:0,&quot;335572089&quot;:0,&quot;469789798&quot;:&quot;nil&quot;,&quot;469789802&quot;:&quot;nil&quot;,&quot;469789806&quot;:&quot;nil&quot;,&quot;469789810&quot;:&quot;nil&quot;,&quot;469789814&quot;:&quot;nil&quot;}\">\u00a0<\/span><\/p>\n<p><span data-contrast=\"none\">Where traffic weights exceed those commonly encountered on public highways, specialised design advice should be sought.<\/span><span data-ccp-props=\"{}\">\u00a0<\/span><\/p>\n<h3><strong><span class=\"TextRun SCXW154800645 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW154800645 BCX8\">Permeable paving example of loading category A: 1-5% CBR (Attenuation design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23493 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-1-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW104778544 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW104778544 BCX8\">Permeable paving example of loading category B: 1-5% CBR (Attenuation design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23495 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-2-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW182280353 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW182280353 BCX8\">Permeable paving example of loading category C: 1-5% CBR (Attenuation design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23497 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-3-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW109886199 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW109886199 BCX8\">Permeable paving example of loading category D: 1-5% CBR (Attenuation design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23499 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-4-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW18220325 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW18220325 BCX8\">Permeable paving example of loading category E: 1-5% CBR (Attenuation design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23500 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-1024x457.jpg\" alt=\"permeable paving loading categories\" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-5-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW92916805 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW92916805 BCX8\">Permeable paving example of loading category F: 1-5% CBR (Attenuation design)<\/span><\/span><\/strong><span class=\"EOP SCXW92916805 BCX8\" data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23501 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-6-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"NormalTextRun SCXW256568745 BCX8\">Permeable paving example of loading category <\/span><span class=\"NormalTextRun SCXW256568745 BCX8\">A<\/span><span class=\"NormalTextRun SCXW256568745 BCX8\">: 3 and 4% CBR (Infiltration design)<\/span><\/strong><\/h3>\n<h3><img decoding=\"async\" class=\"aligncenter wp-image-23502 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-1024x457.jpg\" alt=\"permeable paving loading categories\" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-7-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><strong>Permeable paving example of loading category B: 5% CBR (Infiltration design)<\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23503 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-8-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW193816942 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW193816942 BCX8\">Permeable paving example of loading category C: 5% CBR (Infiltration design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23504 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-1024x457.jpg\" alt=\"permeable paving loading categories \" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-9-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW189311378 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW189311378 BCX8\">Permeable paving example of loading category D: 3 and 4% CBR (Infiltration design)<\/span><\/span><span class=\"EOP SCXW189311378 BCX8\" data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23505 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-10-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW42840804 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW42840804 BCX8\">Permeable paving example of loading category D: 5% CBR (Infiltration design)<\/span><\/span><\/strong><span class=\"EOP SCXW42840804 BCX8\" data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23506 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-1024x457.jpg\" alt=\"permeable paving loading categories\" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-11-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW152006612 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW152006612 BCX8\">Permeable paving example of loading category E: 1-5% CBR (Infiltration design)<\/span><\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23509 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-12-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW45273212 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW45273212 BCX8\">Permeable paving example of loading category F: 3 &amp; 4% CBR (Infiltration design)<\/span><\/span><span class=\"EOP SCXW45273212 BCX8\" data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23510 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-1024x457.jpg\" alt=\"permeable paving loading categories\" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-13-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3><strong><span class=\"TextRun SCXW135579787 BCX8\" lang=\"EN-GB\" xml:lang=\"EN-GB\" data-contrast=\"none\"><span class=\"NormalTextRun SCXW135579787 BCX8\">Permeable paving example of loading category F: 5% CBR (Infiltration design)<\/span><\/span><span class=\"EOP SCXW135579787 BCX8\" data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/strong><\/h3>\n<p><img decoding=\"async\" class=\"aligncenter wp-image-23511 size-large\" src=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-1024x457.jpg\" alt=\"\" width=\"1024\" height=\"457\" srcset=\"https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-1024x457.jpg 1024w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-300x134.jpg 300w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-768x343.jpg 768w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-1536x686.jpg 1536w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-450x201.jpg 450w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled-20x9.jpg 20w, https:\/\/www.tobermore.co.uk\/professional\/wp-content\/uploads\/tobermore-design-and-specification-of-permeable-paving-by-loading-categories-diagram-14-scaled.jpg 2048w\" sizes=\"(max-width: 1024px) 100vw, 1024px\" \/><\/p>\n<h3 data-ccp-border-top=\"0px none \" data-ccp-padding-top=\"0px\" data-ccp-border-bottom=\"1px solid #000000\" data-ccp-padding-bottom=\"0px\"><b><span data-contrast=\"none\">Where can I get advice on the design and specification of permeable paving by loading category?\u00a0<\/span><\/b><span data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/h3>\n<p data-ccp-border-top=\"0px none \" data-ccp-padding-top=\"0px\" data-ccp-border-bottom=\"1px solid #000000\" data-ccp-padding-bottom=\"0px\"><span data-contrast=\"auto\">You can request our complimentary <\/span><a href=\"https:\/\/www.tobermore.co.uk\/professional\/support-services\/permeable-paving-design\/\"><span data-contrast=\"none\">permeable paving and SuDS design service<\/span><\/a><span data-contrast=\"auto\"> from the <\/span><span data-contrast=\"none\">Tobermore<\/span><span data-contrast=\"auto\"> design team<\/span><span data-contrast=\"none\">. They have <\/span><span data-contrast=\"auto\">in-depth<\/span><span data-contrast=\"none\"> knowledge built up from years of successfully specifying Tobermore permeable paving solutions for a wide variety of projects.\u00a0<\/span><span data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/p>\n<p data-ccp-border-top=\"0px none \" data-ccp-padding-top=\"0px\" data-ccp-border-bottom=\"1px solid #000000\" data-ccp-padding-bottom=\"0px\"><span data-contrast=\"none\">Craig McBride, Tobermore\u2019s Technical and Product Training Manager, comments:<\/span><span data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/p>\n<blockquote>\n<p data-ccp-border-top=\"0px none \" data-ccp-padding-top=\"0px\" data-ccp-border-bottom=\"1px solid #000000\" data-ccp-padding-bottom=\"0px\"><i><span data-contrast=\"none\">\u201cIt is important that permeable paving systems are designed to offer the correct support for the project loading categories. Understanding the factors at play<\/span><\/i><i><span data-contrast=\"auto\">,<\/span><\/i><i><span data-contrast=\"none\"> such as the strength of the soil as well as the loads that will be encountered by the permeable paving<\/span><\/i><i><span data-contrast=\"auto\">,<\/span><\/i><i><span data-contrast=\"none\"> is key to getting the design right. We have a wealth of experience and can also call upon specialist engineering and design advice when required. In this way<\/span><\/i><i><span data-contrast=\"auto\">,<\/span><\/i><i><span data-contrast=\"none\"> we ensure our customers continue to get the best support possible to match the high quality and durability of Tobermore\u2019s permeable paving systems.\u201d\u00a0<\/span><\/i><span data-ccp-props=\"{&quot;335572079&quot;:6,&quot;335572080&quot;:0,&quot;335572081&quot;:0,&quot;469789806&quot;:&quot;single&quot;}\">\u00a0<\/span><\/p>\n<\/blockquote>\n","protected":false},"excerpt":{"rendered":"<p>Loading categories describe the type of traffic and loading that an area of permeable block&#8230;<\/p>\n","protected":false},"author":73,"featured_media":23514,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"inline_featured_image":false,"footnotes":""},"categories":[971],"tags":[],"class_list":["post-23472","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technical","tax_posts_products-permeable-paving"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Design and specification of permeable paving by loading categories<\/title>\n<meta name=\"description\" content=\"How soil strength and the expected loadings of different traffic categories impact the specification of permeable paving loading categories.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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