Size charts, dimensions and weights

Schedule 10, 20 and 80 available to the same standard, Grade A and Grade B. Wall thickness runs to 12 mm, which is what sets the top of this table — heavier walls are supplied against order.

Light-wall mechanical and general-engineering tube, quoted on outside diameter. Heavier walls at each diameter are covered by the Schedule 40 chart on the MS Pipe page.

Galvanized iron pipe to ASTM A-53 Sch 40 also available, subject to enquiry.

Outside diameter in mm, figures in kilograms per metre. A dash means that wall is not rolled in that diameter.

Section size in mm, figures in kilograms per metre. A dash means that wall is not rolled in that size.

Section size in mm, figures in kilograms per metre. A dash means that wall is not rolled in that size.

Section size in mm, figures in kilograms per metre.

Section size in mm, figures in kilograms per metre.

Available in various lengths, subject to enquiry.

Outer corner radius taken as 1.5 × wall, the cold-formed convention. Sizes outside this range are rolled to order — confirm the die set with the sales office before specifying.

Same basis as the square chart: corner radius 1.5 × wall. Sizes are quoted depth × width; other combinations are rolled to order.

Grade designations are the specified minimum yield strength in ksi. PSL 2 carries the same strength floors as PSL 1 plus tighter chemistry limits, guaranteed impact toughness and mandatory non-destructive inspection — specify which level the project requires.

Outside diameter is the nominal size; BS 4568 holds it to ±0.3 mm and IS 9537 applies a minus-only tolerance. BS 4568 conduit is supplied in 3.75 m lengths threaded to ISO metric form at both ends. Class 4 is the same size range hot-dip galvanized rather than pre-galvanized. Weights are nominal, at 7.85 g/cm³.

One line per thickness, as published — a shape is not one product but one per gauge, and the bundle weight moves with it. A, B, C and D are section dimensions in mm.

Thickness 0.50 mm to 20 mm: cold rolled 0.50 mm to 3.00 mm, hot rolled 1.5 mm and heavier. Weights are for plain uncoated steel. Sheet weight is for a 4×8 ft (1219 × 2438 mm) sheet — pro-rata for 1250 × 2500 mm or 1500 × 3000 mm.

Weights are BASE STEEL only. Note that ASTM A653 and EN 10346 both define the ordered thickness as INCLUDING the zinc — a 0.50 mm G90 sheet carries about 0.46 mm of steel. Order to ASTM A653 Supplementary Requirement S1 if you need the thickness to mean base metal. Zinc adds its own coating mass on top: Z275 = 275 g/m² = 0.275 kg/m² across both faces.

Weights are base metal thickness (BMT), excluding zinc and paint. Total coated thickness (TCT) runs 0.04–0.09 mm above BMT once the zinc and the paint system are counted — always confirm which basis a quotation is written on.

Order on COVER width, never overall width. Cover is what one sheet actually covers once side-lapped; the difference is the lap you are paying for but not covering with. Corrugated cover assumes a two-corrugation side lap, which is what high-wind and monsoon exposure calls for — a one-corrugation lap gains about 76 mm of cover and loses weather resistance.

Gauge numbers are Standard Wire Gauge and are trade shorthand, not a tolerance — order on the millimetre. Running weights are nominal, calculated at 7.85 g/cm³; the coil is supplied to weight, so length per coil follows from the gauge.

Class A carries 550 g/m² of zinc, Class B 1000 g/m², both measured over the two surfaces. Running weights are calculated from the developed width of the section.

Panels lap one corrugation at each splice, so the effective length is shorter than the panel itself. Post spacing is set by the containment level the road authority specifies.