Just purchased a new 2021 Momentum M-Class 381M-R toy hauler and want to use the overhead loft area (kitchen side access) for storage. Is there a specific weight limit that I need to be aware of before storing? I understand it’s a small bed space to hold the weight of an average person, just may want to store more than a person’s weight. Thanks in advance!
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Is there a weight limit for overhead loft bed?
Last edited by Ellis32198; 02-23-2021, 08:52 AM.Please assume that if I’m asking, I’ve already searched the manual. -
Originally posted by Ellis32198 View PostJust purchased a new 2021 Momentum M-Class 381M-R toy hauler and want to use the overhead loft area (kitchen side access) for storage. Is there a specific weight limit that I need to be aware of before storing? I understand it’s a small bed space to hold the weight of an average person, just may want to store more than a person’s weight. THNKS IN ADVANCE!2018 Reflection 150 Series 220RK 5th whee, Star White 2022 F350 King Ranch CC Long bed (HAL) (CCC 4062lbs), B&W 25K OEM Companion,. SteadyFast system, Trailer reverse lights, rear receiver spare tire holder, storage tube, sumo springs, Victron MultiPlus 12/120/3000, Solar, Custom 6K axles upgrade, and other modifications.
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Ellis32198 ... in case you have a hard time finding it, here's a link to the letter referenced by Keith: Welcome Letter to New Members
The owners manuals (if you prefer digital) are here: https://www.granddesignrv.com/owner-...owners-manuals
Interestingly, there's a rating I've never seen or heard about before in v10 of the Momentum manual. It's the SCWR (Sleeping Capacity Weight Rating). This is defined as, The manufacturer’s designated number of sleeping positions multiplied by 154 pounds (70 kilograms). It's in the glossary, page 216. I couldn't find any other reference to this rating in the GD manual, but doing a brief internet search it appears this rating is an RVIA specification.
For a definitive answer (assuming there's no sticker on the frame as suggested by Keith) call your dealer or Grand Design Customer Service.
HowardForum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.
2017 Ford F-350 DRW, '19 315RLTSPlus
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Originally posted by howson View PostEllis32198 ...
Interestingly, there's a rating I've never seen or heard about before in v10 of the Momentum manual. It's the SCWR (Sleeping Capacity Weight Rating). This is defined as, The manufacturer’s designated number of sleeping positions multiplied by 154 pounds (70 kilograms). It's in the glossary, page 216. I couldn't find any other reference to this rating in the GD manual, but doing a brief internet search it appears this rating is an RVIA specification.
Howard
Wow, 154 lbs per person? I had to do a double check on this and your right, that's what it says. I haven't weighed that since junior high (Now called middle school). Good thing its just me and SWMBO, but now you have me worried that the nose of our fiver will collapse in the middle of the night.
I'm hoping that this is just a factor used by the designers and manufactures when they're developing the load rating for the trailer and not the actual design live load used for sleeping areas and the loft.John
2018 Momentum 395M
2018 Ram 3500 Dually
Every day is a Saturday, but with no lawn to mow.
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Originally posted by JBill9694 View Post
Wow, 154 lbs per person? I had to do a double check on this and your right, that's what it says. I haven't weighed that since junior high (Now called middle school). Good thing its just me and SWMBO, but now you have me worried that the nose of our fiver will collapse in the middle of the night.
I'm hoping that this is just a factor used by the designers and manufactures when they're developing the load rating for the trailer and not the actual design live load used for sleeping areas and the loft.
GDRV-Megan -- can you add any clarity to the baseline GD uses when engineering the weight a bed will carry? Surely it can't be the RVIA "standard" of 154 lbs? Is there a difference between a bed expected to be used by an adult vs a child?
I readily admit there's a lot of gaps in my knowledge in this area. Whatever you can publicly share would be very helpful.Forum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.
2017 Ford F-350 DRW, '19 315RLTSPlus
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HMMM.. this is very interesting! I haven't heard of this either until you all brought this up. According to Google, this is the hypothetical weight of passengers. So if you're trying to calculate your CCC, and don't know for sure how much your passengers weigh, this is an average starting point.
howsonLast edited by GDRV-Megan; 02-22-2021, 12:56 PM.
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Originally posted by GDRV-Megan View PostHMMM.. this is very interesting!
Do you have information that can answer Ellis32198's question (the OP)? See post #1.
Thanks!
HowardForum moderators are not GD employees--we are volunteers and owners presumably just like yourself. Unless specifically mentioned otherwise, we have nothing to gain should you choose to purchase a product or engage a service we discuss on this forum.
2017 Ford F-350 DRW, '19 315RLTSPlus
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Safety Factor m = Strength / Stress max Where 1 would be designed right at the point of failure.
This can also be written as m = Load at failure / Normal Load.
So if the engineers used a safety factor of 2, the Load at failure would be 308 and the normal load would be at 154. Unlikely the engineers would share the safety factor since folks would load up to that limit. But you never know.
Jim
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Wow y’all, I really didn’t mean to open this can of worms.
I thought for sure that someone would have asked this previously since loft beds have been a thing for a while. Well, now that the can has been opened...thanks for the assist!Please assume that if I’m asking, I’ve already searched the manual.
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Originally posted by Ellis32198 View PostWow y’all, I really didn’t mean to open this can of worms.
I thought for sure that someone would have asked this previously since loft beds have been a thing for a while. Well, now that the can has been opened...thanks for the assist!
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Originally posted by howson View Post
Indeed--why is this rating even in the GD manual when it's not addressed anywhere else? Something tells me a manual writer did a cut-and-paste from another source...but I digress...
Do you have information that can answer Ellis32198's question (the OP)? See post #1.
Thanks!
Howard
I agree with Guest that a safety factor was used (usually higher than 2 for live loads), but this still doesn't explain the staring base load of 154 lbs per person. Guess we may never know.John
2018 Momentum 395M
2018 Ram 3500 Dually
Every day is a Saturday, but with no lawn to mow.
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Originally posted by JBill9694 View Post
One final digression, I suspect that Howard is write and that this was cut and pasted into the glossary from another source, and that this SCWR is more applicable to motor coaches where you need to account than towed RVs. Still doesn't explain the low weight unless RVIA is using an average of say a family of four (No, I have no documentation to support this assumption).
I agree with Guest that a safety factor was used (usually higher than 2 for live loads), but this still doesn't explain the staring base load of 154 lbs per person. Guess we may never know.Please assume that if I’m asking, I’ve already searched the manual.
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