double 2x8 spans

[darcar]

Is there a table or a way of figuring how far 2 x 8's doubled up can span?

A contractor is proposing to use double 2x8's to span 15'-4" to avoid having to provide an intermediate bearing wall...

Thanks

 

[north star]

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What type & grade of wood?....Is this Residential or Commercial?

Interior or exterior walls, ...load bearing or non-load bearing,

snow loads, ...spacing of the 2 x 8's, ...are there any loads that

will be imposed upon the span, ...decking area, sleeping area,

...living area, etc.

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[darcar]

If there isn't a table or chart available, we would ask that a design professional do load calculations, and of course species, spacing, etc. would need to be factored in.

 

[north star]

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Need more info to be able to assist you...



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[darcar]

I'm not asking for you to calculate it, just looking for tables that address either double members or 4x8's.

Thanks though

 

[DRP]

awc.org, WSDD tables

 

[fatboy]

R602.7, which directs you to Tables R502.5(1) and R502.5(2). Outside of those it would not be prescriptive, and engineered design would be required. Assumption of IRC construction, sections are from 2006.

 

[mark handler]

Floor Joist?

Ceiling Joist?

Beam?

Loads?

Allowable deflection?

Type and grade of lumber?

Not enough information

I go Back to sleep.............................

 

[fatboy]

"I go Back to sleep............................. "

Wish I could...................