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    4. how many 2 x 12's lamanated for a beam to span 21 ft.
    how many 2 x 12's lamanated for a beam to span 21 ft.

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    0  Views: 758 Answers: 1 Posted: 11 years ago
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      Four, they must be staggered of coarse, you must also sandwich 1/2 inch plywood in between each 2x12. Glued and screwed. Two Carriage bolts equaly spaced on three foot centers.

      11 years ago. Rating: 3
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