A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Jack Beam
A primary horizontal member used to support another beam, truss or rafter.
Jamb
Vertical member at the side of a wall opening.
Jib Crane
A cantilever boom or horizontal beam with a hoist and trolley.
Joist
A horizontal member for supporting the decking of floors or roofs.
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