Pan joist floor system
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Pan Joist Floor System. ACI 318, 8.11.1 “Joist construction consists of a monolithic combination of regularly spaced ribs and a top slab arranged to span in one direction or two orthogonal directions.”. Pan Joists. Rib width ≥ 4” Rib depth ≤ 3.5 x rib width Clear spacing between ribs ≤ 30”

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Pan Joist Floor System

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Pan joist floor system

Pan Joist Floor System

ACI 318, 8.11.1 “Joist construction consists of a monolithic combination of regularly spaced ribs and a top slab arranged to span in one direction or two orthogonal directions.”


Pan joists

Pan Joists

  • Rib width ≥ 4”

  • Rib depth ≤ 3.5 x rib width

  • Clear spacing between ribs ≤ 30”

  • Minimum slab thickness 2” for 20” pans and 2.5” for 30” pans

    Advantages over ordinary beam design:

  • Requirement for stirrups in beams when Vu > ФVc/2 is waived

  • Cover requirements for joist is same as for slabs


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