Section 126(b) in The Rajasthan Building and Other Construction Workers (Regulation of Employment and Conditions of Service) Rules, 2009
(b)every runway or ramp for the use of transport equipment like trailers, trucks or heavier vehicles has a width of not less than three point seven meters and is provided with timber curbs or any other material of adequate strength with not less than two hundred millimeters by two hundred millimeters in width placed parallel to, and secured to, the sides of such runway or ramp and such runways or ramps are designed in accordance with the relevant national standards.