The farmer his own builder : a guide and reference book for the construction of dwellings, barns and other farm buildings, together with their utilities, describing reliable methods, offering practical suggestions, presenting numerous details and formulas, and explaining simple rules for estimating the labor and materials required With special reference to concrete and carpentry . angers is offsetby saving the labor of mortising. When the joists are in place the first floor is usuallylaid at once. This stiffens the work, helps to shelter thebasement, and, most important of all, affords a plat-
The farmer his own builder : a guide and reference book for the construction of dwellings, barns and other farm buildings, together with their utilities, describing reliable methods, offering practical suggestions, presenting numerous details and formulas, and explaining simple rules for estimating the labor and materials required With special reference to concrete and carpentry . angers is offsetby saving the labor of mortising. When the joists are in place the first floor is usuallylaid at once. This stiffens the work, helps to shelter thebasement, and, most important of all, affords a plat-form on which to proceed with the rest of the the floor is to be double, then the under flooringor rough flooring should be laid diagonally across thejoists, as this adds greatly to the strength of the building,and offers a more uniform surface for laying the finishedfloor. io4 THE FARMER HIS OWN BUILDER BRIDGING As soon as the floor is laid, and before this, if theboards are laid diagonally, the joists or beams must bebridged, as shown in Fig. 55. Another term for thiswork is trussed, or herring-bone bridging. It consistsof pieces of scantling, usually 1 x 3 or 2 x 3 stuff,fitted diagonally between the joists, and nailed to thetop of one beam and to the bottom of the next. Theyare placed in straight lines at intervals of 8 or 10 feetacross the length of the ^ ^ & vvO ^ WW ^5> Fig. 55-—Bridging for floor joists. Fig. 56.—Bridging for wall studs. Bridging stiffens the floor frame very materially,though it adds nothing to its strength as a whole. Itprevents uneven deflection of the joists, and thereforeeliminates vibration, since a more heavily loaded joistis prevented from sagging below the others by trans-mitting the excess weight to the adjoining timbers bymeans of the bridging. You might reason that piecesof plank cut off square and inserted between the joistswill serve the same purpose, but this is not so. Sucha method is called plank bridging, or hori
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Keywords: ., bookcentury1900, bookdecade1910, bookpublisherphiladelphiadmckay
