Beams & Girders Bearing

[Francis Vineyard]

Have an addition to the exterior, plans show a 2x12 and 2x10 beams attached to a 2x10 ledger; is there another section in the code similar to R502.2.2.2 for another than deck that I can reference?

R502.2.2.2 Alternate deck ledger connection.

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Deckledger connections not conforming to Table R502.2.2.1shall be designed in accordance with accepted engineering practice. Girders supporting deck joists shall not be supported on deck ledgers or band joists. Deck ledgers shall not be supported on stone or masonry veneer.



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( Not reference in chapter 5! WFCM 3.3.1.2 Beams and girder shall bear on loadbearing walls, piles, concrete or masonry foundations, or beams hangers.)

Thanks,

Francis

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[iggentleman]

R502.6 addresses joist bearing.

 

[Francis Vineyard]

Why would it be necessary to have R502.2.2.1? It seems with R502.6 one could rest the beam on a 2x2 ledger nailed to the ledger board or use a metal hanger on the same.

R502.6 Bearing.

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The ends of each joist, beam or girder shall have not less than 1.5 inches of bearing on wood or metal and not less than 3 inches on masonry or concrete except where supported on a 1-inch-by-4-inch ribbon strip and nailed to the adjacent stud or by the use of approved joist hangers.



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[4thorns]

I interpret this to mean that the beam must be anchored directly to the primary structure. Usually the box of the floor system. The band or rim joist would then either run over the top or stop at the beam and then continue on the other side, depends on the construction method. If it's sits on a hanger attached to the ledger board it's counting on the ledger connections to hold it up. My 2 cents.

Doug

Haven't found anything to back it up yet but it seems to me that your case, an addition floor, would probably fall in the same category.

 

[DRP]

I agree, the prescriptive deck ledger connection is intended for uniform loading rather than the point loads produced by intersecting beams.

Can the beams go through the existing rim and be supported on the existing foundation?