Flag pole base design
Flag pole base design
(OP)
i've got a 6 foot by 8 foot wide sign going on a 10' pole.... relocating it.
Should I use a 24" dia. pier or how do I figure a footing size for it?
anchor bolt design too.
When was the last time you drove down the highway without seeing a commercial truck hauling goods?
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RE: Flag pole base design
Respect footings, the question is more than anything to meet the allowable stresses.
I understand the push for economy that drives everyone, but for single items like this is scarcely worth. A proper training should produce designers able to do this design without any doubt. What we can't do at one forum like this is to preovide a complete engineering design for some requested items.
Respect bolts and so on, usually anchor bolts are embedded to the footing, then the pole is leveled to stay vertical, and the nuts locked to this position. A plate or more complex design ensures proper transfer of forces between pole and foundation through the bolts.
Wind is a dynamical solicitation and many bolts anchoring signal poles with big panels get broken. In some codes, friction bolts are required never permitting the interface to lose contact are mandated. In all cases, to reduce the stress range in tension will enhance the (fatigue) life of the bolts. To use ductile nuts will also help against their failure in fatigue.
RE: Flag pole base design
RE: Flag pole base design
Also available at:
(http://www.stmediagroup.com/st-bin/quikstore3.cgi?product=X45 )is an Excel spreadsheet for the sign designs presented in the text. You can also purchase the text from this site for $75.00.
RE: Flag pole base design
Embedded is often more economical with the larger billboard signs (your case may be different). Reference UBC to help with embedment requirements.
RE: Flag pole base design
RE: Flag pole base design
RE: Flag pole base design
Equation C13-5 of this spec says q=Vf/9cD. Can anyone tell me what "c" is for in this equation?