Light, metal R-shaped sections used in supporting acoustic panels in suspended ceilings
A mixture of clay, sand, and Boulders
Survey instruments that are able to transmit data from the field directly to the office.
The “arms” part of the flooring of a cross shaped church
A steel bar with threaded portions at both ends fitted with eyebolts, so that when turned, will shorten the distance between the two eyebolts. Used in tightening bracing cables in structural steel frames.