OWSJ Configurations
OWSJ Configurations
(OP)
We are redesigning a community center in Panama that was poorly designed and is currently failing. The structure is approximately 64' x 64' and they want to avoid putting any columns on the interior so as not to obstructing people's view. So we are left designing a roof systems with 64' spans which is causing us problems. We are on a tight budget with limited material availability and weight restrictions so we are trying to use open web steel joists.
When we use a standard configuration like the one on the right side of the attached drawing (sorry, I just drew it up in paint quickly), the loading on the 2 64' girders is too large. One idea we had was to configure the joists diagonally as shown on the left side of the drawing. This would eliminate some of the point loads on the girders by sending them straight to the columns. I want to know if this is possible/acceptable and how we would calculate the tributary areas on the joists.
Any advice would be appreciated. Thanks.
Steve
When we use a standard configuration like the one on the right side of the attached drawing (sorry, I just drew it up in paint quickly), the loading on the 2 64' girders is too large. One idea we had was to configure the joists diagonally as shown on the left side of the drawing. This would eliminate some of the point loads on the girders by sending them straight to the columns. I want to know if this is possible/acceptable and how we would calculate the tributary areas on the joists.
Any advice would be appreciated. Thanks.
Steve






RE: OWSJ Configurations
You go too far outside the norm of construction and framing and you will drive the cost of the girders through the roof.
Mike McCann
MMC Engineering
http://mmcengineering.tripod.com
RE: OWSJ Configurations
Michael.
Timing has a lot to do with the outcome of a rain dance.
RE: OWSJ Configurations
RE: OWSJ Configurations
Dik
RE: OWSJ Configurations
RE: OWSJ Configurations
Dik
RE: OWSJ Configurations
Dik
RE: OWSJ Configurations
RE: OWSJ Configurations
Dik
RE: OWSJ Configurations
RE: OWSJ Configurations
Dik
RE: OWSJ Configurations
A good choice in my locale would be a spacing of 5'-4" with 1.5" deep x 22 gauge steel deck.
BA