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A platform stair with two intermediate landings, one near the top and one near the bottom, with a 90° change […]

A V-shaped roof formed by two lean-to roofs meeting at their low edge with a gutter at their intersection.

Wood lath, twice the normal thickness.

A window having a mullion which is so shaped as to form two lancets.

A fitting for a water pipe or a drainage pipe which has a branch on each side.

A short rafter that joins a hip to a valley.