File:The Architect and engineer of California and the Pacific Coast (1910) (14784321072).jpg

Identifier: architectenginee2210sanf (find matches)
Title: The Architect & engineer of California and the Pacific Coast
Year: 1905 (1900s)
Authors:
Subjects: Architecture Architecture Architecture Building
Publisher: San Francisco, Calif. : Architect and Engineer Co
Contributing Library: San Francisco Public Library
Digitizing Sponsor: San Francisco Public Library

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scribe waterproofing by use of pitchand felt, of certain viaducts, retaining walls, cut and cover tunnels, pipesubways, elevator pits, conduit banks, etc., which have been designed andconstructed in New York tin under the writers supervision. The workto be described was performed under three separate contracts, but thematerials used were the same in each ease, the specifications varying onlyas to number of plies, methods of procedure and char;protection of waterproofed surface. The clauses of specifications, which apply to»materials and application,are as follow s : Pitch used shall bi pitch, which shall soften Fahr and mell al 11!l I degrees fahr . being a grade intherefrom shall have a pecific 1.105 The felt shall be Hydrex felt, manufactured bj I pole, M ass.,: i ir fell equal! ■■ *Read before the B of ) the Assi iciati I * N ow I Ik I1 \ drex Felt and I i The Architect and Engineer- Jire-r/o/y jyYo*y//ya Jmlyoze J?slp/far£W/?oarwrO- Ce^crtrfa Corrr- -—. ..■■-• .-■:
Text Appearing After Image:
Figure I Pitch, when applied, shall be of a temperature of not less than 250 degrees fahr.The pitch shall be mopped on the surface of the masonry to a uniform thickness ofnot less than 1-16 inch. Each layer of pitch must completely cover the surface onwhich it is spread without cracks or blow holes. The felt must be rolled out into thepitch while the latter is still hot and pressed against it so as to insure its being com-pletely stuck to the pitch over its entire surface. Great care must be taken that alljoints in the felt are well broken, and that the ends of the rolls of the bottom layerare carried up on the inside of the layers on the sides, and those of the roof down onthe outside of the layers on the sides, so as to secure the full laps herein specified. Other important clauses are : It is intended that the interior of waterproof structures shall be permanently freefrom moisture or discoloration due to the percolation of water or other liquids fromoutside sources. This end shall

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