Waler
A horizontal reinforcement utilized to keep newly poured concrete forms from bulging outward. Also spelled whaler.
Warren truss
A truss having only sloping members between the top and bottom horizontal members.
Waste pipe
A pipe to carry waste water from a basin, bath or skin in building.
Water main
The water pipe in a street from which water is delivered to individual service pipe supplying domestic property.
Water proofing walls
Making walls impervious to water or dampness, by mixing a compound with the concrete or by applying compound to the surface.
Water stop
Device to prevent or retard the flow of water through the leaks to joints.
Water treatment
Purification of water to make it suitable for drinking or for any other use.
Water voids
These are the voids in the concrete as a result of excess of mixing water. In hardened concrete they may contain air or water.
Wave shaper
Of explosive, an insert or core of insert material or of explosive having different detonation rates, used for changing the shape of the detonation wave.
Weep hole
A hole in a wood sill, retaining wall or other structure to allow accumulated water to escape.
Well hole
The small space enclosed on three sides by three flights of a stair.
Wet slip
An opening between two wharves or piers where dock trails are usually conducted, and the final fitting out is done.
