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200 mm deep Hollowcore slab
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self weight of precast unit (without structural screed):
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3.09 kN/m2
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concrete strength at service (28 days):
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50 N/mm2
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concrete strength at transfer:
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30 N/mm2
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prestressing strands:
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7 wire 9.3 mm strand
fpu = 1700 N/mm2
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prestressing:
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70% fpu
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maximum number of strands:
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14
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cover to strand:
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25 mm
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fire resistance (BS8110:Part 1:1997; Table 4.9):
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1 hour
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| minimum required effective bearing width (BS8110:Part 1:1997; Clause 5.2): |
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on concrete:
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55 mm
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on structural steel:
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40 mm
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on masonry:
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65 mm
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