Message 1 of 6
LTB parameters for rafters and columns
- Mark as New
- Bookmark
- Subscribe
- Mute
- Subscribe to RSS Feed
- Permalink
- Report
i'm designing steel portal frame with span 41 meter , i followed BS Code in design , my hand calculations indicates that the sections obtained from robot is bigger than the ones that obtained from manual calcs . my thoughts are the problem is in the LTB parameters although i defined the spacing between purlins as intermediate restraint but still get the same problem ! Could you help me to clarifying this discrepancies ?
Note that the sections obtained from manual calcs are
UB 533X210X122 For Rafters
UB 610X229X140 For Columns
Here's the link to model
https://drive.google.com/open?id=1_za0jtCLe0NwCninhsA2CGgqqMUU9ojC
Thanks in advance
Muhannad M.Abu Abdo
Structural Design Engineer
Structural Design Engineer