collector
See solar collector.
drop chutes and elephant trunks, which may or may not be attached; often used alone for placing concrete in shallow
In an emergency, a safe area that receives occupants from the assembly space it serves, as well as from other
In wood roof construction, a timber which prevents the roof framing from changing its shape
1. The joint between a roof rafter and a collar beam. 2. The vertical joint between masonry withes.
A hole of shallow depth, drilled into a material to prevent slippage of the bit when a deeper hole is