39 



this. Note the method of running concrete columns 

 as described on page 57. 



FIG. 19. TEMPLET FOR SPACING COLUMN RODS. 



Avoid Metal Rests. Unless absolutely necessary, 

 metal should not rest on the forms. This condition 

 is liable to develop a rust spot in the future. Metal 

 is too good a conductor of heat to be placed between 

 the lower surface of the concrete and the reinforcing 

 rods. 



Marking Centering for Placing Steel. When the 

 centering is ready for the steel, it is a good idea to 

 have your steel foreman go over the floor with the 

 blue-prints and a piece of crayon or keel, and letter 

 the beams and .girders to correspond with the plans, 

 in bis: plain letters on the decking beside the beams 

 and also specify the rods required, like this : 

 BRA MA 



2 $4-in. Twisted Bent. 



2 ^-in. Twisted Straight. 



It is also an easy master to lay down a pole or a 

 rule and mark the rod spacing. "Spot the rods" as it 



