Both are 16.5 mm corrugate, 851 mm overall blank, 8° CoP cladding pitch, 15 m run check. Dimond cover is 762 mm. Metalcraft cover is 760 mm. Stratco CGI 0.40 BMT is also 760 mm (0.55 BMT often 750 mm). Count from cover. Using 851 mm under-orders by about 10%.
The corrugated calculator defaults Metalcraft. Switch profile on the takeoff when the coil is Dimond.
When 2 mm changes the order
Sheet count = ceil(width ÷ cover) per plane. A 9.200 m plane is 13 sheets on either 762 or 760 mm. A width that sits on a rounding boundary can differ by one sheet — write the millimetres from the coil tag, not “corrugate”. Dimond also publishes about ±5 mm cover tolerance; Metalcraft notes dimensions can move with material.
Neither product is a 6° option. Recheck geometry or step to trapezoidal (low-pitch profiles). Short runs do not lower the 8° table.
Manufacturer extras
Metalcraft: 8° after deflection up to 30 m sheets; 9° from 30–50 m at ≤100 mm/hr. That is stricter than the generic CoP 15 m check. Stratco: thermal-expansion joints often around 24 m light / 16 m dark. Dimond lists drape curve; Metalcraft lists bullnose, drape and spring — curving is a fabrication conversation, not a takeoff fudge.
Fixings, spans, BMT and coating are on the current sheet. This site is not affiliated with either mill.
Order line
Nominate manufacturer + profile + cover + colour + BMT. Same 851 mm overall with the wrong cover is a different pack. Then pitch, run, flashings, waste. Open min pitch if anyone still wants 6°. Current NZMRM CoP and the named product sheet win.