Joe Builder” uses 8″ beam columns. Isn that stronger than GCCs 4-1/2″ pipe uprights?
Well, GCC’s method of using 4-1/2″ schedule 40 pipe columns has been engineered for strength because the rigidity of the column is consistent in all directions due to its round shape. Also, “Joe Builder” anchors his beam colums to the top of the slab which creates a shear point or weak point at the column/slab connection. This significantly reduces the tolerances of the structure. GCC sets each pipe column within a 3′ deep concrete pier which eliminates the weak point at the slab. The pipe upright is simply more steel at 11 lbs per ft. Compared to an 8″ beam upright at 10 lbs per ft.
