As per JKC request, full information with supporting documents in PDF format has to provide for JKC’s review, thus please issue again.
For Steel Grating 40mm THK, please use unit weight of 42.1 kg/m2 as per attached vendor’s information.
Grating for Stair Tread is made to order and please use the weight as shown in Fabrication Drawings, no need to measure/detail but using the details in Bill of Materials.