lsj 225 242 joists 1954
 

lsj 225 & 242 joists 1954
i have a plan for a building constructed in 1954 that shows lsj 225 & lsj 242 joists. i am unable to find them listed in the sji 60-year manual. is any one familair with this type o f joists?
the sji sent me some information today. the joist appear to have been made by bethlehem pratt co.