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Author Topic: Heavy mattress sizing struts  (Read 354 times)

garyb1st

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Heavy mattress sizing struts
« on: October 10, 2017, 12:25:43 PM »
Custom ordered a mattress that will weigh about 90 lbs.  Current mattress is standard queen 80 x 60 x 6.  Weight unknown.  Will likely need to replace struts.  Anyone know how I determine appropriate strut size?  It's also possible we'll want to add a topper on the mattress.  If so, it could add another 15 to 20 lbs to the bed.   

 
Gary B1st

2005 Pace Arrow 35G
2016 Jeep Wrangler

Rene T

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Re: Heavy mattress sizing struts
« Reply #1 on: October 10, 2017, 03:54:52 PM »
Weigh your old mattress and go from there.  The shocks you have may work. 
Rene & Lucille & co-pilot Buddy
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2011 Chevy Duramax 2500 HD 4X4
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Sun2Retire

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Re: Heavy mattress sizing struts
« Reply #2 on: October 10, 2017, 04:15:53 PM »
I replaced my struts with the strongest I could find, 110# each if I recall. Much better but would still like more lift at the bottom.
Scott
2005 Newmar Dutch Star 3810, Spartan, Cat C7 350 "OURVEE"
Eezrv TPMS, VMSpc, 800W Solar
2002 Dodge RAM 1500 Quad Cab "RTOAD"
Stowmaster towbar & Brakemaster

garyb1st

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Re: Heavy mattress sizing struts
« Reply #3 on: October 11, 2017, 10:32:06 AM »
Scott, were they the same length.  One of my concerns is placement.  If the replacement strut is longer or shorter, I'll have to move the attachment point.  If so, how do I determine that.  I've seen some explanations that require a fair amount of math.  Mine is pretty rusty. 
Gary B1st

2005 Pace Arrow 35G
2016 Jeep Wrangler

Sun2Retire

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Re: Heavy mattress sizing struts
« Reply #4 on: October 11, 2017, 11:02:04 AM »
Scott, were they the same length.  One of my concerns is placement.  If the replacement strut is longer or shorter, I'll have to move the attachment point.  If so, how do I determine that.  I've seen some explanations that require a fair amount of math.  Mine is pretty rusty.


Yes, they were the same length. You may want to check with RVUpgrades.com (one of the forum sponsors) regarding replacement. They should be able to find a same length replacement that just snaps on the existing mounts (you’ll want to be sure to get the right design as there are a couple different types).


Re the math, I hear you. I gave up and just ordered the strongest I could get
Scott
2005 Newmar Dutch Star 3810, Spartan, Cat C7 350 "OURVEE"
Eezrv TPMS, VMSpc, 800W Solar
2002 Dodge RAM 1500 Quad Cab "RTOAD"
Stowmaster towbar & Brakemaster

cpaulsen

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Re: Heavy mattress sizing struts
« Reply #5 on: October 11, 2017, 06:57:57 PM »
If you move the bottom attaching points about 2" out.........it makes t easier to lift the bed.
2008 Ford F250/CC/SB/V-10/Montana 3670RL

Sun2Retire

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Re: Heavy mattress sizing struts
« Reply #6 on: October 11, 2017, 08:41:30 PM »
If you move the bottom attaching points about 2" out.........it makes t easier to lift the bed.


I think before you move it you’d have to be sure the struts weren’t already fully compressed when then bed is down
Scott
2005 Newmar Dutch Star 3810, Spartan, Cat C7 350 "OURVEE"
Eezrv TPMS, VMSpc, 800W Solar
2002 Dodge RAM 1500 Quad Cab "RTOAD"
Stowmaster towbar & Brakemaster

garyb1st

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Re: Heavy mattress sizing struts
« Reply #7 on: October 12, 2017, 09:25:56 AM »
If you move the bottom attaching points about 2" out.........it makes t easier to lift the bed.

Would a longer strut do the same thing? 
Gary B1st

2005 Pace Arrow 35G
2016 Jeep Wrangler

Sun2Retire

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Re: Heavy mattress sizing struts
« Reply #8 on: October 12, 2017, 09:29:58 AM »
Would a longer strut do the same thing?


Yes, but again, you have to be sure there is room for the strut when fully compressed.


The problem with the strut setup is the geometry of the struts - when the bed is down the fully compressed struts provide very little vertical assistance in the first 12” or so of lift, then suddenly there’s plenty. I had hoped by going to the 110# struts lifting the bed would be a one handed operation. While it’s much better, it still takes a grunt to get it started (my SO can barely do it).
« Last Edit: October 12, 2017, 09:41:05 AM by Sun2Retire »
Scott
2005 Newmar Dutch Star 3810, Spartan, Cat C7 350 "OURVEE"
Eezrv TPMS, VMSpc, 800W Solar
2002 Dodge RAM 1500 Quad Cab "RTOAD"
Stowmaster towbar & Brakemaster

skeeter_ca

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Re: Heavy mattress sizing struts
« Reply #9 on: October 23, 2017, 06:13:18 PM »
I was thinking about replacing my struts with one or two of these 12v linear actuators. It could lift it with someone laying on the bed. That would be cool. And shouldn't be to hard.

https://www.ebay.com/itm/Linear-Actuator-18-inch-Stroke-Heavy-Duty-12-Volt-DC-200-Pound-Max-Lift-12V-/390708040507?epid=668048639&hash=item5af803933b:g:11EAAOxyi3FR0Pg~

skeeter



 

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