Drawings

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Like specifications, the level of detail to provide on drawings will be determined by the extent and complexity of the path construction and any related feature work required but should include:

Location plan

A 1:2500 Ordnance Survey map showing the general location of the route where the path and any related features will be installed.

General site layout plan

A 1:1250 or at least 1:2500 scale plan, showing the proposed path alignment and locations of related features to be installed with relevant drawing numbers. Also marking the locations of construction site boundaries, access points and routes through the site, site area to be avoided or dealt with specially (SSSI's etc), and any remaining unobvious hazards or risks on the site. These hazards or risks can be higlighted by site safety symbols with appropriate wording e.g. for contaminated land a 'hazard warning symbol' with wording 'WARNING' and 'CONTAMINATED LAND' is suitable and sufficient method to provide health and safety information to those working on site who need to know there is unobvious hazard present which could cause harm.

hazard

Site assessment survey sheets

Site assessment survey sheets can provide information about the different construction works along the length of route within the construction site, including location of the works. Remember that these survey sheets are unlikely to be drawn to an precise scale, and if applying for planning permission, you will need to explain this to the planning officer. Like general site layout plans, site assessment survey sheets can also show health and safety information relating to the construction site and path construction and any related feature work.

Construction drawings

Construction drawings are cross section drawings, showing the widths, depths and materials for formation, base and surface layers etc, should also be detailed as part of the design for the benefit of the Contractor or Principal Contractor. Any other related feature or structure such as drainage works should also have a cross section drawing to show all construction details required. These drawings should be cross referenced with the relevant specifications and work items in the bill of quantities.

Construction drawing is also effective communication tool for informing others about remaining safety or health risks with the design. One communciation method is to provide 'SHE' boxes on construction drawings. For further information - SHE Boxes on Drawings.

Checklist for a construction drawing
Maximum formation tray excavation depth and width
Whether a geotextile sheet / geogrid is to be used
Base layer depth, width and type of granular sub base material to be supplied and laid in the formation tray
Maximum and minimum camber or crossfall gradient for the base layer should also be clearly shown
Surface layer depth, width and type of surface material to be supplied and laid on top of base layer
Maximum and minimum camber or crossfall gradient for the surface layer should also be clearly shown
How the finished surface layer should be level with the ground at the edges for full tray excavation, or, how the verges are to be built up level with the finished path surface for semi-tray excavation
It should also state any BS EN quality standards for materials and include a note that the drawings should be read in conjunction with the relevant specification details

 

Examples of construction drawings for various path surface types are provided below:

Unbound surface

icon As Dug Path - Standard Detail Drawing & Specification Details

icon Whin Dust Path - Standard Detail Drawing & Specification Details

icon Granite Dust Path - Standard Detail Drawing & Specification Details

Semi-bound surface

icon Toptrec Path - Standard Detail Drawing & Specification Details

Bound surface

icon Dense Bitumen Macadam (DBM) Path - Standard Detail Drawing & Specification Details

icon Hot Rolled Asphalt Path - Standard Detail Drawing & Specification Details

icon Surface Dressed Path - Standard Detail Drawing & Specification Details

icon Bound Gravel Path - Standard Detail Drawing & Specification Details

Porous surface

icon Reinforced Grass Path - Standard Detail Drawing & Specification Details

icon Reinforced Gravel Path - Standard Detail Drawing & Specification Details

 

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© 2014 Paths for All - Registered Scottish Charity No: SC025535, Company Limited by Guarantee No: 168554 inc. 19 Sept 1996 at Companies House, Edinburgh