couple
Two equal and opposite parallel forces, with different lines of action, tending to produce rotation of a body; their moment […]
Glossary
Glossary
couple-close, close couple
A pair of opposite rafters which are connected by a collar beam or tie beam and are tied together at
Glossary
couple roof, coupled roof
A double-pitched roof, usually of narrow span, in which opposite rafters are not tied together; the walls resist the outward
Glossary
coupling pin
A pin, 1 which is used to connect lifts or tiers or formwork scaffolding vertically.