Try the stud finder and you'll know. I use one on my rig all the time. Go vertical and horizontal - the people the lay RV's out are NOT carpenters or mechanical engineers.
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2008 Phaeton 36QSH, Safe-t-Plus, Quadra Bigfoot
2017 Jeep Cherokee Trailhawk w/ flat tow wiring mod.
Blue ox, BrakeMaster + BrakeAway, diode lights and charge.
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