
Here are strength of some common building materials based on BS 648. This is useful information for civil/structural engineers
Asphalt
Roofing 2 layers; 19 mm thick, 42 kg per meter square.
Damp-proofing; 19 mm thick, 41 kg per meter square.
Roads and footpaths; 19 mm thick 44 kg per meter square.
Bitumen roofing felts
Mineral surfaced bitumen; 3.5 kg per meter square.
Blockwork
Solid per 25 mm thick stone aggregate ; 55 kg per meter square.
Aerated per 25 mm thick; 15 kg per meter square.
Board
Blockboard per 25 mm thick; 12.5 kg per meter square.
Brickwork
Clay, solid per 25 mm thick; 55 kg per meter square
Medium density Concrete, solid per 25 mm thick; 59 kg per meter square.
Cast stone; 2250 kg per meter cubic.
Concrete
Natural aggregates; 2400 kg per meter cubic.
Lightweight aggregates (structural); 1760 + 240/ −160 kg per meter cubic.
Flagstones
Concrete 50 mm thick; 120 kg meter square.
Glass fibre
Slab, per 25 mm thick; 2.0–5.0 kg meter square.
Gypsum panels and partitions
Building panels 75 mm thick; 44 kg meter square.
Lead
Sheet, 2.5 mm thick; 30 kg per meter square.
Linoleum
3 mm thick; 6 kg per meter square.
Plaster
Two coats gypsum; 13 mm thick; 22 kg per meter square.
Plastics sheeting (corrugated); 4.5 kg per meter square.
Plywood
per mm thick; 0.7 kg meter square.
Reinforced concrete; 2400 kg meter cubic.
Rendering
Cement: sand (1:3), 13 mm thick; 30 kg per meter square.
Screeding
Cement: sand (1:3), 13 mm thick; 30 kg per meter square.
Slate tiles
(depending upon thickness and source); 24–78 kg per meter cubic .
Steel
Solid (mild); 7850 kg per meter cubic.
Corrugated roofing sheets; 10 kg per meter square per mm thick.
Tarmacadam ;
25 mm thick 60 kg per meter square.
Terrazzo;
25 mm thick 54 kg per meter square.
Tiling, roof
Clay; 70 kg per meter square.
Timber
Softwood; 590 kg per meter cubic .
Hardwood; 1250 kg per cubic meter.
Water; 1000 kg per meter cubic.
Woodwool
Slabs; 25 mm thick 15 kg per meter square.
Note: to convert to Newtons per millimeter square; Multiply the amount in kg by 10 and then divide by 1000