25 January 2005
Table D-1 Beam and Column Sizes and Groups
TIE FORCE CHECK.
After designing the steel moment frame building, tie forces are calculated to
ensure progressive collapse requirements are met. Internal tie (ties located at column
lines), peripheral tie, edge column tie and vertical tie requirements are calculated. The
steel structure designed in step 1 (based on member sizes and moment connections)
easily meets tie force requirements (See Table D-2 for tie forces).
For the example structure:
= 25 ft
= 25 ft (internal ties on column lines)
= 84 psf
= 50 psf
Atrib = 625 sf