332 BUILDING DETAILS 



and view (6) shows the bolt that secures the continuous 

 insert to the under side of the beam. 



The device shown in (c} consists of a split pipe in which 

 the T-headed bolts slide. The form boards are shown in 

 place in this view so that it may be seen how the split pipe 

 is held in place in the forms by the strips f. 



In (d), the slide consists of a piece of bent steel embedded 

 in the concrete. As shown, bolts are also used to hold the 

 steel slide in place. 



Two views of another device are shown in (?) and (f). 

 View (e) shows how the slide for the T-headed bolts is held 

 in place, and view (f) shows the bolt in position to support 

 machinery. 



BEARINGS FOR CONCRETE BEAMS AND 

 GIRDERS 



It is often necessary to increase the bearing area of con- 

 crete beams, especially when they rest on brick walls. The 

 ways in which this can be done are shown in Fig. 7. 



In view (d), the end of the beam is formed with projecting 

 spurs at right angles to the axis of the beam, those spurs 

 being of such length as to distribute the bearing over a con- 

 siderable area. The reinforcing rods of the cross-beam are 

 shown at c. 



In order to save concrete, the bearing of the beams may 

 be increased by the method shown in (e). This construction, 

 however, is not so practical as the one shown in (d), because 

 the form is more troublesome to make and fill, and, besides, 

 the masonry does not build so readily with flat beds on the 

 slope as it will with the construction shown in (d). 



