Modern buildings : their planning, construction and equipment (1905)
Middleton, G. A. T. (George Alexander Thomas) · London : Caxton Publishing Company, Limited · leaf 149
much traffic Swing Doors are usually provided. managed. For this a running bar or track is required, These may be either single or double doors, opening supported at each end, and in the case of double doors either way, and fitted with a spring hinge let into floor ; in the middle also. This is… … “ Helical spring butts ” are a simple device for hang- contained in brackets attached to the top of the door. ing a swing door, and can be provided with single or The bottoms of doors should also be provided with double action. hollow-edged guide rollers, running on a guide fixed Borrowing an idea…
Building · Architecture
Internet Archive · Getty Research Institute · Public domain (published before 1931). Free to use for anything.
