HEAVY TIMBER 



"Floors shall be not less than 3 inches (2% inches dressed) flooring 

 laid crossways or diagonally. Top flooring shall not extend closer than l / 2 

 inch to walls so as to allow for swelling in case floor becomes wet. This 

 space shall be covered by a moulding so arranged that it will not obstruct 

 movement of the flooring. 



"Waterproofing shall be laid between the planking and the floor in 

 such manner as to make a thoroughly waterproof floor to a height of at 

 least 3 inches above floor level. When there are no scuppers, the elevator 

 or stairwells may be used as drains for the floors,, in which case the water- 

 proofing material need not be flashed up at these points. 



"All exposed woodwork in exterior construction shall be planed smooth. 



"Pipes or conduits extending through floors shall be fitted with metal 

 thimbles and made watertight to a distance of 3 inches above floor. 



"All floors shall be arranged to drain to elevator well or some other 

 point where minimum damage will result from water. It is recommended 

 that, where feasible, floors be built with a slight pitch (about 1 inch to 20 

 feet) and have proper scuppers or drain pipes. 



thicknesses of waterproof paper or its equivalent to be laid 

 between the planking and the flooring in such a manner as to make a thor- 

 oughly waterproof floor to a height of at least 3 inches above floor level. 

 If the paper itself is waterproof, the joints should be swabbed with tar, 

 pitch, or their equivalent and overlapped at least 2 inches. If the paper is 

 not waterproof, the entire surface of the lower layer to be swabbed with 

 tar, pitch, or their equivalent and the upper layer placed on the lower while 

 hot. Waterproofing paper to be flashed up at least 3 inches above floor 

 openings and protected with mop board." 



Fig. 7 shows an interesting point in connection with the 

 erection of the framing in a mill construction building where 

 laminated floors are used. This building was put up during 

 cold weather, and the temperature was considered to be too 

 low for laying brickwork properly. In order not to hinder 

 the progress of the structure, it was decided to go ahead with 

 the framing of the floors and follow later with the walls. Sup- 

 ports similar to those shown at the end of the girder in Fig. 7 

 were used throughout each story of the building above the 

 brickwork already placed. The posts were supported in place 

 by braces at the cap to prevent them from falling sideways, 

 and in the opposite direction by the girders themselves. The 

 ends of the flooring at the walls were supported by a temporary 

 plate which could be easily removed after the final wall sup- 

 port was in place. 



^Uniform Requirements. 

 Page twenty-four 



