How the work gets done

Run the numbers

Each guide points at the calculator that does its arithmetic:

• Roof pitch & common rafter — Pitch to angle, slope factor, and common rafter length with the ridge deduction and tail.
• Stair stringer layout — Equal risers from a total rise, with tread depth, total run, stringer length and the 2R+T check.
• Board feet — Board feet from nominal dimensions, for one piece or a whole order.
• Concrete volume — Slabs, continuous footings and round piers in cubic yards, with waste and bag counts.
• Hip & valley rafter — Hip length, hip angle, and the common difference that steps every jack rafter down.
• Compound miter for crown — Miter and bevel settings for sprung moulding cut flat, at any spring and corner angle.
• Conduit offset bending — Multiplier, distance between bends, and the shrink to take off the measurement.
• Pipe rolling offset — True offset, travel and run when a pipe moves up and sideways at once.
• Rebar mat & weight — Bar count both ways, total linear feet and weight, for a slab mat at your spacing.
• Wall framing takeoff — Studs, plates and sheathing for a straight wall — with what is deliberately left out.
• Roofing squares & bundles — Footprint and pitch to roof area, squares and bundles, with waste.
• Drainage slope & fall — Total fall over a run, in inches per foot, percent or ratio — all three at once.