weight limits on 2x10 floor joist


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i have 2x10 floor joist 16" on center that span 13', i have a large piece of equiptment that is 30"x 26" that is very heavy, what load will these joist hold the piece of equiptment will cover 2 of the joist
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Can you set the equipment so it is over the supports of the floor so the floor is actually carrying little weight? Is this a static weight or does the machine present a dynamic load due to moving parts and vibrations?
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Proper cross bracing will spread the weight on adjacent joists. If you have concerns, why not double up the joists under the equipment.
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browningman wrote:

You could always put a beam across the two joists and a pole to the floor. That would ease your mind.
--
Blattus Slafaly ? 3 :) 7/8

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Try here. http://www.awc.org/calculators/span/calc/timbercalcstyle.asp http://www.awc.org/pdf/WSDD/C2B.pdf
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browningman wrote:

You need a lot more detail than that to determine if it's safe.
First off, 30" x 26" (5.4 sq. ft.) is not a large area, so it would be considered a point load.
Now, what is "very heavy"? Some people would consider 500# very heavy, though it's equal to a couple large people standing together. 2,000# would reasonably be considered very heavy.
Next, what other loads are on this section of floor? Is the underside accessible for providing additional support? Is there height available for a load spreading structure between the equipment and the floor? How about dynamic load like someone else mentioned? Big difference between a welder and a punch press as far as dynamic loading.
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