balance arm

balance arm

[′bal·əns ‚ärm]
(building construction)
On a projected window, a side supporting arm which is constructed so that the center of gravity of the sash is not changed appreciably when the window is opened.

balance arm

On a projected window, a side supporting arm which is constructed so that the center of gravity of the sash is not changed appreciably when opened.
References in periodicals archive ?
The instruments that are attached to a dental chair are foot switch, imaging system, balance arm, operating light, X-ray viewer, and extended tray.
The light's features include a drift free balance arm design, unlimited positioning and optimal flexibility around the bore and a 114-inch vertical and horizontal reach for head-to-toe coverage.
Two of the three remaining systems are of a very similar type consisting of superior balance arm constructions, each with different but easy to use gripping heads.
The light's features include a drift free balance arm design, unlimited positioning, optimal flexibility around the bore and a 114-inch vertical and horizontal reach for head-to-toe coverage.
The top-loading TGA design is said to mean no more finicky hang-down wires or fragile exposed balance arms.
Instead, the mast rolls out on the truck's balance arms, extending the forks into a storage location.