| » How far can I span without a beam?
The PCI Design Handbook recommends limits on span-depth ratios for the hollowcore slabs. For roof slabs, a span-depth ratio limit of 50 is suggested. In practice, a span-depth ratio of 45 is common for floors and roofs where fire endurance, openings, or heavy or sustained live loads do not control a design.
Example: 10" Spancrete® roof with a span to depth ratio of 50
10" x 50 = 500 /N
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| 500 |
= 41.67 FT or 41'–8" |
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| 12 |
SMA Research Notes (stored as PDFs)
1021: Span Limitations - Floor Vibrations - Rhythmic Activity
1022: Span Limitations - Floor Vibrations - Heel Drop Response
1023: Span Limitations - Floor Vibrations - Flexible Supports
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