. Transactions. J |l| ri ^^^—^^—f70~4- ||»^sT:^t2M^MC^-^^T^^^^^ ?<—yo- ;13 60 x TO- 400 (Works drawing No. 1853.)Fig. 2.—Plan and Machinery for Fan-House. 712 NOTES ON BAG-fIlTRATION PLANTS. tioii is of brick, outside walls being 21 in. thick for a heiglit of16 ft., then reduced to 17 in. for 18 ft., and to 13 in. for the re-maining 17 ft. 6 in. Twentj-four-inch brick buttresses project-ing 4 ft. at floor-line and tapering to about 1 ft. at roof-trussline, are built into the walls to stiffen them. Fifteen buttressesare built on each side of the building, and five on each end. 3 Ply El
. Transactions. J |l| ri ^^^—^^—f70~4- ||»^sT:^t2M^MC^-^^T^^^^^ ?<—yo- ;13 60 x TO- 400 (Works drawing No. 1853.)Fig. 2.—Plan and Machinery for Fan-House. 712 NOTES ON BAG-fIlTRATION PLANTS. tioii is of brick, outside walls being 21 in. thick for a heiglit of16 ft., then reduced to 17 in. for 18 ft., and to 13 in. for the re-maining 17 ft. 6 in. Twentj-four-inch brick buttresses project-ing 4 ft. at floor-line and tapering to about 1 ft. at roof-trussline, are built into the walls to stiffen them. Fifteen buttressesare built on each side of the building, and five on each end. 3 Ply Elaterite Rooflng^ Seams Horiz., 6Lap. Note: Original Roofto laid over theOriginal Roof DETAIL OF ROOFOVER SECTION J^l (Works drawing No. 2075.)Fig. 3.—Sketch Showing Construction op Bag-House Roof,American Smelting & Refining Co., Murray, Utah. Roof- 3 (Drawing No. 2075) shows in detail the evolution in theconstruction of the bag-house roof. Originally the roof consistedof 2- by 6-in. rafters spaced 3 ft. apart and fastened to 6-in. chan-nels by means of an angle-clip which was bolted to the rafters andto the channels, 1-in. Oregon fir common boards nailed to therafters and 3-ply elaterite roofing nailed on these boards withvertical seams, the seams being laid in tar-paint. This roof NOTES ON BAG-FILTRATION PLANTS. 713 commenced to leak after a few months, due to the corrosion ofthe brads holding the elaterite roofing in place. These brads wereeaten to such an extent that when a compartment was open anda slight wind was blowing, the elaterite rooting would be lifted offfrom the boards
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Keywords: ., bo, bookcentury1800, bookdecade1870, booksubjectmineralindustries
