Roof Rail Load - Jeep Commander Forums: Jeep Commander Forum
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post #1 of 5 (permalink) Old 03-29-2008, 12:12 PM Thread Starter
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Question Roof Rail Load

quick question - if i add a second set of cross rails to my roof rack, will this increase the load capacity?

e.g. - if the stock rails are rated for 150lb, by adding a second set could i then carry 300lb?
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post #2 of 5 (permalink) Old 03-29-2008, 12:51 PM
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Quote:
Originally Posted by 08XKLimited
quick question - if i add a second set of cross rails to my roof rack, will this increase the load capacity?

e.g. - if the stock rails are rated for 150lb, by adding a second set could i then carry 300lb?
I don't think it works that way.

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post #3 of 5 (permalink) Old 03-29-2008, 01:01 PM Thread Starter
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is it the rails, the side rails or the roof itself that is rated for the load? the toyotas can carry 300...
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post #4 of 5 (permalink) Old 03-29-2008, 01:35 PM
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If the load rating is for the rails themselves, and not for the roof, I think you would increase the carrying capacity by adding rails. You are distributing the weight among 4 supports instead of two. If the situation were reversed and you were taking rails OUT I think everyone would agree that that WOULD decrease the load capacity, right?

However, if we're talking about the roof itself, adding rails won't change much. But, I know they hold over 150 lbs as is. I put a fully loaded topped on that weighed in excess of 250 lbs and moved from Augusta, GA to Missoula, MT without a problem.

I'm no physics major, so I can't say how MUCH additional bars would increase the capacity, but I think it would.

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post #5 of 5 (permalink) Old 03-29-2008, 04:18 PM Thread Starter
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i do too - like you said, the weight is distributed over a larger area.
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