WROUGHT IRON AND STEEL BEAMS. 



191 



BENDING TEST OF A STEEL JOIST. 



Depth 6m. 



Breadth Gin. 



Thickness Hn. 



Span 5 ft. 



Moment of inertia of the section, 55 '9. 



From these observed results, the elastic modulus for 

 the material can be calculated. 



It will be remembered that the Modulus of Elasticity, 



~ 48.8.1 



First, to find the deflection corresponding to a 

 central load W. From the above figures it will be seen that 

 the increments of deflection are sensibly uniform up to a 



