Find useful construction reference charts covering sizes, dimensions, spacing, materials, and common jobsite measurements.
188 resources available
Complete inch-series machine screw reference: numbered and fractional sizes, diameter, TPI, thread series, length, head style, drive type and matching hardware.
Rafter size is selected from horizontal projection, spacing, roof loads, deflection, species, grade and bearing, not from one universal size-to-span rule.
Roof trusses are engineered assemblies, not individual lumber members. Span must be evaluated with truss type, spacing, pitch, loads, bearing, bracing and the actual design drawing.
Ceiling joist span depends on size, species, grade, spacing, load and deflection. Every numerical table on this page states its exact AWC design condition.
Convert roof pitch to angle, slope percentage, decimal slope, rafter length factor, and roof area factor, covering 1:12 through 16:12.
The complete NPS, DN, outside diameter, wall thickness, inside diameter, and weight reference for Schedule 80 steel pipe, in inches and millimeters.
The complete NPS, DN, outside diameter, wall thickness, inside diameter, and weight reference for Schedule 40 steel pipe, in inches and millimeters.
A pipe schedule is a standardized wall thickness designation tied to a specific NPS, not a universal thickness or pressure value. This chart maps NPS and…
Plain end weight for welded and seamless wrought steel pipe, with the exact formula, worked examples, and water filled weight calculations.
Nominal copper tube size is not its actual outside diameter. 1/2 inch nominal copper tube measures 0.625 inches OD, with different ID depending on Type K,…
Nominal PVC size is a standardized designation, not a direct measurement. This chart provides actual OD, ID and wall thickness by schedule and SDR, based on…
Pipe schedule does not by itself determine pressure rating. This chart provides genuine published pressure data where it exists and explains the engineering factors where it…