. The action of materials under stress; . xnr. L Xx.^. 268 STRUCTURAL MECHANICS. XX., or preferably as at V., or at XV., if the web is lateral bracing must* not be overlooked. X. is one form of section of a solid bridge floor. Rec-tangular sections are also used. Examples.— i. Four timbers, 6 in. X 12 in., 15 ft. long, are incompression. If placed side by side, with space between for circu-lation of air, what will be the max. permissible distance betweenpacking pieces, so that the timbers may be equally safe againstflexure in either direction ? 2. What pull can the bolt of IX
. The action of materials under stress; . xnr. L Xx.^. 268 STRUCTURAL MECHANICS. XX., or preferably as at V., or at XV., if the web is lateral bracing must* not be overlooked. X. is one form of section of a solid bridge floor. Rec-tangular sections are also used. Examples.— i. Four timbers, 6 in. X 12 in., 15 ft. long, are incompression. If placed side by side, with space between for circu-lation of air, what will be the max. permissible distance betweenpacking pieces, so that the timbers may be equally safe againstflexure in either direction ? 2. What pull can the bolt of IX., Plate II., safely resist, ifthe nut is i^ in. square, is 8 in, from end of stick, and q = 150lbs. ? If the compression under the nut ought not to exceed 1,800lbs., what can the without deducting its cross-section ? 7,200 lbs. 4,050 lbs. 3. hxi 8 in. by 8 in. timber of Southern pine is spliced as inXL, Plate II. Design the splice by § 169, 4th line from bottom?of table, and find what it will carry, neglecting the bolts. 4. A cast be
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectstrengt, bookyear1897
