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09-11-2013, 01:42 PM
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#1
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Established Member
Join Date: Sep 2011
Location: Cross Lanes
Posts: 30
M.O.C. #11735
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Mattress upgrade from queen to King
Was wondering if anyone had modified bed in a 3400rl to accommodate a king size mattress. And what other mods were needed to make this work?
Thanks in advance
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09-11-2013, 01:50 PM
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#2
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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I believe the only thing you have to do is enlarge the platform top plywood to king size. We had a king bed in our 3400. The mattress has to be the radius king due to the location of the sink cabinet since the mattress goes against the cabinet when the slide is retracted. When you order king size from the factory, the platform is king size versus a queen size platform when the queen is ordered. The hinge would have to be changed as well. Another alternative would be to add to the top of the queen platform, but that will increase the weight to be lifted to access the under-bed storage.
Bingo
__________________
Bingo and Cathy - Our adventures begin in the hills of WV. We are blessed by our 2014 3850FL Big Sky (previous 2011 3750FL and 2007 3400RL) that we pull with a 2007 Chevy Silverado Classic DRW CC dually.
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09-11-2013, 02:10 PM
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#3
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Montana Master
Join Date: Dec 2009
Location: Sebring
Posts: 3,659
M.O.C. #9969
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We had the Factory King in our previous Monty (2955RL) and the platform was in two sections. The lower section was wider to support the King, but the section in the slide was only Queen size width. Not much weight on the head end, and the hinge was only the width of the queen portion.
__________________
Michelle & Ann
2018 Chevy 3500HD High Country DRW 4X4 Crew Cab w/Duramax/Allison, Formally 2010 Montana 2955RL, Now Loaded 2016 SOB, Mor/ryde IS, Disc Brakes & Pin Box, Comfort Ride Hitch, Sailun 17.5 Tires.
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09-11-2013, 02:16 PM
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#4
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Montana Master
Join Date: Nov 2007
Location: Canon City
Posts: 1,340
M.O.C. #7919
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mhs4771 is correct. The lower section is the plywood section sized to fit the mattress. I cut a king down to fit a queen. I think you could go the other way and upsize the plywood to fit a king.
Joe
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09-11-2013, 02:46 PM
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#5
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Montana Master
Join Date: Feb 2007
Location: Winfield
Posts: 7,327
M.O.C. #6846
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Thanks for the correction all (I was never aware of the difference but it makes since from a cost-cutting construction viewpoint). The other thing that I do specifically remember is in addition to the radius king needed, the platform edges at the vanity sink cabinet and the closet side is cut at 45 degree angle so the platform does not hit the sink cabinet. I don't know if this is unique to the 3400 or if all king beds are cut in a similar fashion (I would think so due to the radius mattress corners). I would recommend measuring for the cut on the lower plywood section with the slide retracted to make sure the platform plywood cannot hit the cabinet.
Bingo
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09-11-2013, 02:46 PM
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#6
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Montana Fan
Join Date: May 2010
Location: Crossville
Posts: 184
M.O.C. #10367
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The only structural change is the platform from the hinges to the foot end. We changed ours in reverse and took it down from a king to a queen and all had to be done was to trim the edges of the platform about 3 inches on both sides. As stated in earlier post, the top (head) portion is the same size on both queen and king. BTW, I have the King mattress that was only slept on for 5 times if anyone is interested. If you are going to a king size, the rv size in only 76 inches vs. the 80 inches for the standard residential mattress.
__________________
Crossville, TN
2012 3455SA
2013 Ram 3500 Swd
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09-12-2013, 04:28 PM
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#7
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Montana Master
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
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We intend to go from king down to queen. DW is getting cranky having to do a side step shuffle just to get into the bed.
Quote:
quote:Originally posted by Jolu
mhs4771 is correct. The lower section is the plywood section sized to fit the mattress. I cut a king down to fit a queen. I think you could go the other way and upsize the plywood to fit a king.
Joe
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__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
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09-12-2013, 04:29 PM
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#8
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Montana Master
Join Date: Jun 2010
Location: Colorado Springs
Posts: 3,335
M.O.C. #10496
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We intend to go from king down to queen. DW is getting cranky having to do a side step shuffle just to get into the bed.
Quote:
quote:Originally posted by Jolu
mhs4771 is correct. The lower section is the plywood section sized to fit the mattress. I cut a king down to fit a queen. I think you could go the other way and upsize the plywood to fit a king.
Joe
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__________________
2010 3150RL
LevelUp, Dual 6 volt batteries, Progressive Industries EMS HW50C, Honda EU2000i Generator, Bridgestone Duravis R250 tires, Torklift Glowstep Revolution Stairs, LED Tail lights
2015 RAM 3500 Laramie SRW LB CC Cummins 6.7L Aisin Trans B&W RVK3600
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