Structural · S-CV9ZM

Concrete Beam to Timber Roof Joist Connection

Materials

Concrete Reinforced Concrete Timber / Wood

Elements

Beams Roofs Ceilings Reinforcing

Connections

Welded Connection Timber / Mass-Timber Connection

About this detail

A reinforced concrete beam supports wood roof framing on both faces using engineered joist hangers and treated lumber ledgers. The concrete beam is reinforced with number five main rebar and number four stirrups spaced at twelve inches on center, supplemented by added number five rebar. On the exterior side, a nailer is secured to a miscellaneous steel channel beam top flange with five-eighths inch diameter welded machine bolts spaced at twenty-four inches on center, carrying plywood roof sheathing and a Simpson "ITS" header. On the interior side, a pressure-treated full depth two-by ledger is anchored to the concrete with five-eighths inch diameter anchor bolts at sixteen inches on center in a staggered pattern, supporting wood I-joists per plan. An additional line of five-eighths inch diameter anchor bolts at thirty-two inches on center anchors the assembly through the concrete beam.

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