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Author Topic: MA40 tower bolts  (Read 745 times)
AB7R
Member

Posts: 128




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« on: May 03, 2013, 01:32:18 PM »

Looking for information on how long the concrete bolts are supposed to be for a UST MA40 tubular tower.

Thanks and 73
Greg
AB7R
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KB4QAA
Member

Posts: 2367




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« Reply #1 on: May 03, 2013, 02:57:27 PM »

http://www.ustower.com/#!catalogs-&-forms

Go to their website or call them on the phone for the technical specifications.  Unless you are an ME doing your own design, putting up towers is not something that should be trusted to heresay on the internet.

Good luck on your project!
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AA4HA
Member

Posts: 1418




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« Reply #2 on: May 03, 2013, 03:59:00 PM »

Note that US Tower will provide you with the minimum specifications for the tower you are purchasing (M40 being 40' tall). You may want to go with longer anchor bolts (if they have them available and as an option). The cost difference is insignificant to what you are spending on the tower.

Also, you do need to have a rebar cage built for the foundation. The idea being that you want that mass of concrete and steel to act as, and to be, one giant piece.
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Ms. Tisha Hayes, AA4HA
Lookout Mountain, Alabama
K2MK
Member

Posts: 393




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« Reply #3 on: May 04, 2013, 05:48:27 AM »

Hi Greg,

I have the 15 page PDF engineering package which I'll be happy to e-mail to you if you contact me directly. You didn't mention if you are using the MAB-40 tilt base. I think the bolts are the same regardless. The specs call out four 3/4" diameter ASTM A36 headed anchor bolts of 27" overall length. The full document shows the design of the rebar cage, etc.. The rebar cage is surprisingly complex.

73,
Mike K2MK
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