Plywood Structural Panels
Why does the code require trademarks to distinguish the various plywood types? All plywood is not the same. Panels may be suitable for specific...
B1010
Preservative Treated Wood
What are those Commodity Specifications referenced by the building codes? AWPA U1 referenced by the code specifies wood preservative treatments by...
SFRM Types and Applications
What binder, density, and bond strength are required for sprayed fire-resistive materials? New building code requirements include additional...
Water Vapor Transmission - Get the Units Right
Water vapor transmission is confusing - three different properties, each with their own units of measure. Can you rely on manufacturer's data...
Fireblocking and Draftstopping
Combustible construction can provide perfect paths through concealed spaces to allow fires to spread quickly and undetected. Fireblocking and...
Wood Preservative Treatment
Drawing Note Says: Treated wood sill plate. What type - Preservative? Fire Retardant? Both are wood treatments. Know the building code to understand...
Floor Slab Flatness and Levelness
Flatness, Levelness, F-Numbers, Straightedge: What do the numbers mean? Recent changes to ACI 117 provide new procedures for straightedge...