What’s the difference between progressive and non progresssive partition systems
Progressive you put one panel at a time 1 then 2 then 3 then 4
Non progressive are independent and can be removed or replaced individually
Residential gyp thickness vs commercial gyp
1/2” residential
5/8” commercial
Three components of door system
Door, frame, hardware
Door types
Door types
Safety glass
Test for fire rated doors
NFPA 80 and NFPA 252 for assemblies
And ansi ul 10b
Acoustical ceiling systems
Stairs tread calculation
2R+T=25”h (635mm)
General rule 7” rise to 11in tread
Residential wood Stair elevation
Commercial Steele stair
What is a chase
An enclosed vertical space used only to accommodate ducts or pipes