Architectural iron and steel, and its application in the construction of buildings ... specifications of ironwork ... tables selected expressly for this work ... by Wm. H. Birkmire (1905)
Birkmire, Wm. H. (William Harvey), 1860-1924 · New York, J. Wiley · leaf 116
stiffness to the doors when closed. To secure them whenshut, a padlock is placed in centre, with bolts at each end. DOORS AND SHUTTERS. 97 A 4-inch-diameter ring ^ inch thick is placed on the outside,by which to raise the doors when required to be opened. … SECTION A-S A resting block in the shape of a triangle is secured to thesidewalk, for each door to rest against when open ; and a•g-inch-diameter bar, turned down at each end, resting in an eyeriveted to the frame, holds the door open at an angle of 75degrees. 98 ARCHITECTURAL IRON AND STEEL. 153.…
Building, Iron and steel
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