i8 



drive in plenty of spikes part way in, through the sid; 

 into the bottom, the spikes to be drawn with a special 

 bar with a claw; or, better yet, lay down beside the 

 girder side a 2x4-in. Wedge this up tight and so 

 wedge the side up to the bottom tight by wedges bear- 

 ing against blocks spiked onto the top surface of the 

 cap at the ends. Brace the si4es to plumb position, 

 at least temporarily, by short inclined braces tacked to 

 the caps. 



What has been said thus far about girder forms, 

 applies almost word for word to beam forms. Some 

 of the beams may or may not frame directly into col- 

 umns as well as into girders, and they may or may 

 not be as deep as the girders. It must be borne in 

 mind simply that the shores -and bottoms have to stay 

 in place for a longer or shorter period, but the rest 

 of the centering, the beam and girder sides, the joists 

 and floor sheeting, have to come down within a com- 

 paratively short time. So cut beam bottoms like girder 

 bottoms to extend to the surface of the concrete into 

 which the beam frames. Then there will be no lum- 

 ber "behind it," that is, between the end of the bottom 

 and the hardened concrete, which can bind when they 

 are trying to loosen it to take down. 



Shores of course are made up the same as for gird- 

 ers, varying possibly in length when the beam is not 

 so deep as the girder. 



Beam sides in general are made up like the girder 

 sides, but will not have to be notched for any other 

 member framing into them. But the beam sides will 

 have to carry the joists for. the floor sheeting. So a 

 ribbon or ledger board for a joist bearer is nailed 

 along the sides outside the cleats, i x 6-in. is suitable. 

 It is put on at such a distance below the top edge of 

 the side as to bring the sheeting up to the right level. 

 However, it sometimes happens with shallow beams 

 that there are no cleats on the beam sides, since they 

 are of one piece of lumber only. It is well, then, to 



