How to Insulate a Metal Building (Roof and Walls, Step by Step)
How to insulate a metal building roof and walls: faced fiberglass, vapor retarders, thermal blocks, two-layer systems, retrofits and condensation mistakes.
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What Is Mill Scale? Why Paint Fails Over It and How to Remove It
What mill scale is, why paint fails over it, and how it is removed: blast cleaning grades Sa 2.5 and SP 10, pickling, grinding and when to leave it alone.
Basement Support Beams: Steel vs Wood, Sagging Signs and Replacement
How a basement support beam carries the floor, steel vs wood and LVL beams, real W8 and W10 sizes, sagging warning signs and what replacing one involves.
Steel Base Plates: What They Do, How Thick They Are and How They’re Set
What a steel column base plate does, what sets its size and thickness, and how it is leveled, grouted and anchored, with the OSHA four-rod rule explained.
Can You Weld Galvanized Steel? How to Do It Safely
Yes, you can weld galvanized steel. Learn how much zinc to grind off, how to control zinc oxide fumes, and how to repair the coating to ASTM A780 afterward.
Hot Rolled vs Cold Rolled Steel: Differences, Uses and Specs
Hot rolled vs cold rolled steel compared: how each is made, surface, tolerance, strength and cost, the ASTM specs behind them, and which to buy for your job.
Structural Steel Erection: Step-by-Step Process and OSHA Rules
How structural steel erection works, step by step: foundations, columns, beams, bracing and decking, with the OSHA Subpart R rules that apply at each stage.
Expanded Metal Sizes: How to Read 3/4 #9 and What to Specify
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.
Intumescent Paint for Steel: How It Works and How Thick It Needs to Be
How intumescent paint protects structural steel: the four-part chemistry, thin vs thick film, the W/D section factor that sets thickness, and why no generic chart exists.
Steel Grating Sizes: How to Read 19-W-4 and What to Specify
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.