The Fire Protection of Mills and Construction of Mill Floors; Containing Tests of Full Size Wood Mill Columns

The Fire Protection of Mills and Construction of Mill Floors; Containing Tests of Full Size Wood Mill Columns

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This historic book may have numerous typos and missing text. Purchasers can usually download a free scanned copy of the original book (without typos) from the publisher. Not indexed. Not illustrated. 1895 edition. Excerpt: ... building or its contents. one of which consists of encasing them by wood covered with plastering held on by wire lathing. Mortar will not rust iron, but plaster of Paris will do so, unless the iron is covered by some waterproof paint, as the ordinary iron paints made from coal tar. Mr. P. B. Wight, of Chicago, a consulting architect, has given much attention to the protection of iron building material', and has devised the combination iron and wood column shown in figure 34. The iron core of the column has a section resembling a Greek cross, with projections on the sides to secure the four wood sectors which are driven in from the upper end. The spaces between the wood over the edges of the iron core are filled with plaster, which is covered by a strip of sheet iron nailed into the edges of the wooden sectors. Iron columns are protected by refrac tory materials which are also poor conductors of heat, such as porous cements, the hydraulic lime of Teil, concrete, hollow blocks of fire clay, or by the Wight system of protecting iron works with tiles of porous terra cotta. These tiles are made porous by mixing sawdust with the clay; the process of burning the clay consumes the sawdust, leaving little air cells in the space occupied by the particles of sawdust, whose volume amounts to half that of the whole tile. Figure 35 shows the method of securing the tiles around an ordinary cast-iron column, already in position. The ends of the tiles are grooved, and after a row of them is placed around the column, an iron band is placed in the groove, and projects sufficiently to engage in a similar groove upon the bottom of the next row of tiles; before the tiles are pressed together, a layer of mortar is used to fill the grooves and make more

Product details

  • Paperback | 50 pages
  • 189 x 246 x 3mm | 109g
  • United States
  • English
  • black & white illustrations
  • 1236892208
  • 9781236892201