38 



the accompanying sketch. 



Openings. Precautions should be taken to provide 

 extra reinforcement when slabs or beams are weak- 

 ened by open spaces as noted, Fig. 17. A cantilever 



* V- 



FIG. 17. POSITION OF STEEL RODS IN PORTION OF SLAB 

 CANTILEVERED BEYOND BEAM. 



action of the reinforcing steel is commonly used at ele- 

 vator or light-well opening. 



End Anchorage. Best practice demands end an- 

 chorage of beam and girder rods either by: 



(1) Threaded end, nut and plate. 



(2) End hook. 



(3) Continuation of rod into adjoining member. 



(4) Thread and turnbuckles. 



All trussed rods in beam and girder construction 

 should be anchored by one of the above methods. 



Shb rods are usually made continuous by lapping. 



Clean Steel. Steel must be free from grease, loam 

 or any foreign matter. Excessive rust or mill scale 

 should be removed with wire brushes. 



Columns. Column reinforcement should be concen- 

 tric with the column. Use positive means to secure 



