Prestressed Precast Concrete
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Types and Durability
| Description
Pre-stressed Precast Concrete |
Expected Lifespan
(Years) |
Adjustment Factors |
| General | ||
Prestressed precast concrete floor slab complying with BS 8110: Parts land 2 or CP 81:1999, with cover to steel complying with Table 4.8 and specified to match the appropriate exposure category selected from Table 3.2. Minimum nominal cover to all reinforcement of 20mm. Minimum cement content 300kg/m³.
|
35+ | Structural members subjected to ‘very severe’ exposure conditions to Table 3.2 of BS 8110: Part 1, without additional surface protection: -30% years. |
| Unclassified, ie floor slab not complying with BS 8110: Parts 1 and 2 or CP 81:1999. | <35+ |