Hatfield, Robert Griffith, 1815-1879. [from old catalog] · New York & London, Wiley and Putnam · leaf 166
thecommon joists. But it is well to have a rule for determining thesize more accurately in extreme cases. 270.—When the bearing exceeds 8 feet, there should be struts,as a and a, {Fig. 202,) well nailed between the joists. Thesewill prevent the turning or twisting of the floor-joists, and… … Fig. 202. upon the underside. When the length of bearing is great, strutsshould be inserted at about every 4 feet. 271.—Single-joisted floors may be constructed for as great alength of bearing as timber of sufficient depth can be obtained ;but, in such cases, where perfect ceilings are desirable,…
Carpentry · Architecture
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