Building Construction and Superintendence: Trussed roofs and roof trussesW.T. Comstock, 1906 - Building |
Other editions - View all
Common terms and phrases
angles arch trusses architect beam bolted bottom chord building built cantilever trusses ceiling joists centre Chicago Coliseum church columns compression compression members connected counter braces dome dotted lines draw economical Engineering Record Fink Truss flanges floor force frame gable gallery girders half trusses Hall hammer-beam I-beam inches intersection iron joint king-post lantern lattice lattice girders length lower chord main roof main trusses octagonal pairs pieces pitch plane plank plates ported portion posts principal radial rafters resist riveted roof and ceiling roof construction roof load roof trusses scissors truss shape shown in Fig shows side slate space span spiked Splice square foot steel trusses strain stress diagram stress polygon struts support the roof tension tie rods tie-beam top chord train sheds transverse truss shown trussed purlins type of truss vertical W₁ walls Warren truss weight width wind pressure wooden trusses
Popular passages
Page 247 - IV. // any number of forces acting at a point can be represented in magnitude and direction by the sides of a polygon taken in order, they will be in equilibrium.
Page 294 - ... plies of felt ; fifth, spread over the entire surface of the roof a uniform coating of pitch, into which, while hot, imbed the gravel or slag. The gravel or slag in all cases must be dry.
Page 293 - Gravel shall be of such a grade that no particles shall exceed five-eighths (£e) of an inch or be less than one-fourth ( */() of an inch in size. It shall be dry and free from dust or dirt. In cold weather it must be heated immediately before using. Not less than three hundred (300) pounds of Slag or four hundred (400) pounds of Gravel shall be used per one hundred square feet.
Page 294 - First, lay one thickness of rosin sized sheathing paper or unsaturated felt lapping, each sheet i" over the preceding one, and nailing only so often as may be necessary to hold in place until covered with the tarred felt, and the nailing may be omitted entirely if practicable. Over the rosin sized sheathing paper or unsaturated felt, lay two full thicknesses of tarred felt...
Page 293 - Felt shall weigh not less than fourteen (14) pounds per one hundred square feet, single thickness. " The Pitch shall be the best quality of straight run coal tar pitch, distilled direct from American coal tar, and there shall be used not less than one hundred and...
Page 16 - The resultant of two or more forces is that single force which will produce the same effect upon a body as is produced bv the joint action of the component forces.
Page 293 - American coal tar, and there shall be used not less than one hundred and twenty pounds (gross weight) per one hundred square feet of completed roof. The nailing shall be done with three-penny barbed wire roofing nails driven through tin discs. The slag or gravel shall be of such a grade that no particles shall exceed £i" or be less than J4
Page 239 - Flg.7 in equilibrium, the sum of the moments tending to turn the body in one direction must equal the sum of the moments tending to turn the body in the opposite direction about any given point.
Page 294 - Felt (B), lapping each sheet seventeen (17) inches over the preceding one, and nailing along the exposed edges of the sheets only so often as may be necessary to hold the sheets in place until the remaining Felt can be applied. " Over the entire surface of the Felt thus laid, spread a uniform coating of Pitch (C), mopped on.
Page 221 - ... surface. The following table is reproduced by permission from Kidder's Architects' and Builders' Pocket Book (page 1052, 17th Ed.) ALLOWANCE FOR SNOW IN POUNDS PER SQUARE FOOT OF ROOF SURFACE Columns headed by an asterisk (*) are for slate, tile, or metal; those headed by a dagger (f) are for shingles.