Collapsible building block
Collapsible building truss
Collapsible spacer
Collapsible truss structure
Collapsible truss structures
Collapsible, lightweight building stud
Colored building boards, manufacturing methods thereof
Column assembly
Column assembly
Column assembly ii
Column hung truss system
Column structure
Combined fiber optic conduits and office panel
Combined joist and reinforcing bar holder and structure
Compact vacuum insulation
Complex of structural elements for forming glass brick walls
Component made of resinified spaced-layer fabric, and a...
Component type building construction system
Components for multipane window unit sash assemblies
Composite backerboard articles for construction