srm01
Structural
- Apr 6, 2022
- 10
Does anyone know if there are tables or information for precast concrete beams from the late 50's to 60' for I-beam shaped beams (not rectangular). Here is a typical designation on the old plans C.J. 14x4 .51/120 (it may also be 1.20 due to the quality of the plans) or C.J. 8 x 3-1/2 .22/.81 Or is there a good resource you could point me to?
On another part of the plans it has some joists listed without a designation as "typical prest'd [assumed to be prestressed] joist. superimposed load 450 lb/ft". The cross section shows an I-beam shape with a height of 33.5", top flange width of 17", bottom flange width of 15" and web of 4". There is a procedure for steel joists in the SJI manual for charting moments and shear for old steel joists to determine if new additional loads are within capacity. Is there something comparable for concrete prestressed joists? Maybe knowing the superimposed load of 450 lb/ft?
Thank you in advance for your input.
On another part of the plans it has some joists listed without a designation as "typical prest'd [assumed to be prestressed] joist. superimposed load 450 lb/ft". The cross section shows an I-beam shape with a height of 33.5", top flange width of 17", bottom flange width of 15" and web of 4". There is a procedure for steel joists in the SJI manual for charting moments and shear for old steel joists to determine if new additional loads are within capacity. Is there something comparable for concrete prestressed joists? Maybe knowing the superimposed load of 450 lb/ft?
Thank you in advance for your input.
