37 



The entire question of placing the steel is not so 

 complex as it might seem. The design must be under- 

 stood. The vital importance of having the steel in 

 according to the design must be comprehended. Put 

 an intelligent mechanic at it, keep him at it all the 

 time, and check him carefully. Check a section of the 

 floor after the steel is in and before the concrete is 

 placed to see that all the steel is there and in the right 

 position. Then watch the men while the concrete is 

 being poured. That "eternal vigilance is the price of 

 freedom" from mistakes is as true on construction 

 work as anything else. 



n 



*j^ B 



FIG. l6. MOLD FOR MAKING CONCRETE SADDLES, OR 

 SEPARATORS, FOR BEAM AND GIRDER RODS. 



Concrete Spacers. To secure an exact placement of < 

 the beam and girder steel, we recommend a concrete' 

 and steel saddle made on the work, as illustrated in 



