Document evbDG8QZQJw4LEza3N3ay5dBM

INSTALLATION _ llVEFROVEIVEENT ULLETIN Bulletin Ho. 20 Kerch 3, 1932 7ere the top of a Flilrico wall of any appreciable height meets old brick construction considerable difficulty has been experienced, due: ?irat to drying shrinkage causing the mil to settle away from the brick work allow* ing the heat to get in back of the Pli'srlco wall and thus destroying the top anchors and: Second the Plibrlco wall pulling away at the top due to* inadequate anchorage# The attached print B 101 Illustrates what we feel are methods of overcom ing these difficulties. The l* asbestos rope, suggested by IS*. 0. L. Bollard, will effectively prevent the heat from getting back of the Flibrlco wall even though there may bo considerable shrinkage of the Plibrlco away from the brick work. Tfi* placing of extra long anchors at the top of the mil, as shown by the drawing will do a very satisfactory job of keeping tho wall from pulling. have proven this quite thoroughly by considerable experimental work here in Chicago. Tas method of placing the anchor is of greatest importance and should be done as follows: The top part or so of tha mil is built In the usual mannsr, by starting at one end and filling in tha unfinished portian by pounding in the di rection indicated by tha arrows on the drawing. .Tha Plibrlco is tullt up to the lines XL and the anchor la then driven into tha Plibrieo and on to the hook. In an inverted position as shown. In this manner you are sure that the anchor is thoroughly imbedded In solid Plibrieo. Ter new work the oorbel tile is of course used for this purpose, but on old work it is seldom practical to usa tho corbel tile and' consequently resort to the above method as the next beat thing. As an added safety against the top of tho wall pulling away it would be well to place bracing at this point where possible.