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Message - What size of beam is needed to span new room opening

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Posted by  John Heironimus on May 19, 2003 at 07:43:29:

We are undergoing a room addition with the work performed by a design-build company. As part of the addition, they will open an exterior wall to a width of 9 feet, 3 inches. The addition is single story onto a two story. The roof ridge runs parallel to the the wall to be opened. The rafters span approximately 25 feet. The floor joists are 2 x 10's. As I understand it, the span will need to handle dead and live loads from both the roof and the second floor. What size and material beam should be used to span the 9.25 foot opening? The builder is proposing to attach a 1.75 x 11.25 "LDL" to the addition-side of the 2 x 10 joist. In order to do this, it would actually span 14 feet and the ends would be tapered to approximately 3 or 4 inches to accomodate the pitch of the roof of the addition. Is this sufficient?

Thanks very much.

 
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