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10-04-2017, 01:12 PM
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#1
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Montana Fan
Join Date: Jul 2013
Location: Murfreesboro
Posts: 163
M.O.C. #13637
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drilling in floor/ceiling joists
Hi all, I was thinking of mounting a drop down tv mount in the basement, Has anyone drilled the aluminum ceiling joist in the basement for any type of mountings? Does this affect anything structural?
Thank you
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10-04-2017, 03:34 PM
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#2
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Site Team
Join Date: Jun 2011
Location: Wilsey
Posts: 18,799
M.O.C. #11455
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Wasn't a problem for my 2010. Haven't done anything like that to the new one yet.
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10-04-2017, 03:47 PM
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#3
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Montana Master
Join Date: Nov 2015
Location: Arlington
Posts: 1,523
M.O.C. #18081
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Why not screw some plywood to the bottom of the joists to spead out the weight and then secure the drop down mount to the plywood.
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SOB
2015 Volvo VNL780 D13, iShift, 32k ET air hitch, Idle Free LiFePO4 APU
16.8KWhr LiFePO4, 2.52 kw solar, 10kva Victron split phase
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10-04-2017, 04:14 PM
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#4
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Montana Fan
Join Date: Jun 2011
Location: stockton
Posts: 405
M.O.C. #11457
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I have a swing out arm attached to the back wall closest to the door. It has been fine for 3 years of heavy use. I have always been leary of drilling into the aluminum joists, but not sure how valid my concerns are. Aluminum tends to crinkle wherever there is a dimple.
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2014 Montana Mountaineer 331 RLT. Winneguard SWM Traveler Satellite Antenna, Progressive 50 amp portable EMS, 6 point Level Up.. 2016 Chevy 3500 Duramax Dually, long bed, B&W Patriot hitch.
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10-04-2017, 04:17 PM
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#5
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Montana Master
Join Date: Sep 2017
Location: Tacoma
Posts: 1,567
M.O.C. #20475
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As a builder I would screw 1\2" plywood across to at least two of the floor joists to support & spreed the weight of the TV and mount out. The aluminum is not that thick and bends very ease. How big of TV are you putting in there?
Bob & Carol
Tacoma WA
2017 352RL 2008 Dodge 3500 DRW crew cab 6.7L
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10-04-2017, 05:27 PM
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#6
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Montana Fan
Join Date: Jul 2013
Location: Murfreesboro
Posts: 163
M.O.C. #13637
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I have a 32 inch tv on a swing arm now, I was going to screw a piece of plywood to the aluminum joists and mount the drop down mount to the plywood so it would be centered in the basement opening. I just didn't want to drill in the aluminum joist if it was going to compromise the structure.
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10-04-2017, 09:21 PM
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#7
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Montana Master
Join Date: Feb 2005
Location: Haysville
Posts: 4,261
M.O.C. #3085
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I have drilled into the floor joists and side wall aluminum studs to hang small items. The aluminum is extremely thin, so be sure to go the plywood base route that has been talked about.
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10-04-2017, 10:39 PM
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#8
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Montana Fan
Join Date: Feb 2015
Location: Ferndale
Posts: 273
M.O.C. #16033
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I attached some wood to the aluminum by using some liquid nail type material for construction. I then screwed a tube to carry extra sewer hose. Home Depot has it. Very strong bonding material.
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10-05-2017, 06:07 AM
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#9
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Montana Master
Join Date: Mar 2013
Location: Hanover
Posts: 1,473
M.O.C. #13325
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Don't understand the 'extremely thin' joists & rafter bit. I've used self-tapping screws to mount several things on them and they certainly were NOT thin! (But then, I've a 2010 model . . )
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10-05-2017, 07:31 AM
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#10
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Montana Fan
Join Date: Nov 2015
Location: Taylor Ridge
Posts: 224
M.O.C. #18049
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As long as you fill the hole with a screw it should not weaken it. I am a retired Ironworker, not an engineer but that's what I was told. You should use stainless steel screws when attaching to aluminum, mild steel can cause corrosion
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10-05-2017, 11:12 AM
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#11
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Montana Fan
Join Date: Jul 2013
Location: Murfreesboro
Posts: 163
M.O.C. #13637
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Thanks everyone.
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10-05-2017, 02:47 PM
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#12
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Montana Master
Join Date: Oct 2015
Location: westminster md
Posts: 2,328
M.O.C. #17894
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I have drilled and screwed into them many times. They are not a structural part or the camper frame. They are simply part of what supports the bedroom/bathroom floor
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01-13-2018, 12:22 PM
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#13
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Montana Fan
Join Date: Jan 2018
Location: Box Elder
Posts: 247
M.O.C. #21057
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Ceiling joist in basement
Quote:
Originally Posted by ctwebb
Hi all, I was thinking of mounting a drop down tv mount in the basement, Has anyone drilled the aluminum ceiling joist in the basement for any type of mountings? Does this affect anything structural?
Thank you
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I have used self drill screws to mount a rack I made to hold my folding table up against the top of the basement Gets the table up off the floor. Have had this on three 5rs each a different brand and had no problem
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