174 REINFORCED CONCRETE CONSTRUCTION 



68. Columns Reinforced with Structural Steel Shapes. If a 

 structural steel column is designed to take all the load and then 

 is simply fire-proofed with a covering of concrete, it cannot 

 properly be called a reinforced concrete column. To be classed 

 under this heading the steel must be designed so that it takes a 



Front 



Side 



T 

 End View 



FIG. 82. 



load in combination with the concrete; that is, the steel must be 

 figured in the same way as vertical rods and the stresses deter- 

 mined by the formulas previously given. 



Structural steel reinforcement is sometimes in the form of a 

 cross in the center of the column or more often angles are 



