Sizes & Charts

Steel pipe schedule chart with OD, ID, wall thickness and weight per foot for Schedule 40, Schedule 80 and XXS, plus how to read pipe sizes without mistakes.

Standard floor joist spacing is 16 inches on center. See when 12, 19.2 or 24 inches makes sense, how spacing affects span and subfloor, and deck joist spans.

Expanded metal explained: SWD, LWD, strand width, standard vs flattened, weight ranges by material, and why the second number in the designation is not standardized.

Steel bar grating decoded: what 19-W-4 means, standard bearing bar sizes and spacings, the four construction types, traffic surfaces, and the NAAMM and OSHA standards.

Metal stud sizes decoded: web depth, style letter, flange width and mil thickness. Full mils to gauge conversion table, standard depths, and the 33 vs 50 ksi trap.

Unistrut sizes explained: P1000 is 1-5/8 in square in 12 gauge. Full section properties, uniform load by span, the P1000 and P1001 part numbers, and what each finish suffix means.

How steel diamond plate is measured and sold, what ASTM A786 covers, common thicknesses, steel versus aluminum tread plate, and what to specify when ordering.

Rebar size chart for #3 to #18 with diameter, area and weight, why #9 breaks the eighths rule, how the weights are derived and what the grades actually mean.

Steel gauge thickness chart from 7 to 28 gauge in inches and mm, why the numbers run backwards, and the one division that gives you every thickness in it.