7114 All pipes and conduits for services shall be laid and arranged so that the

7114 all pipes and conduits for services shall be

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7.1.1.4 All pipes and conduits for services shall be laid and arranged so that the required concrete cover to the reinforcement is maintained. 7.1.1.5 Sub-clause 7.1.2 gives requirements for slabs on grade. Clause 7.1.3 deals with two types of suspended slabs: solid slabs and joist and block slabs; Figure 7-1 gives typical beam and slab arrangements. 7.1.2 Slab on grade 7.1.2.1 Slab support 7.1.2.1.1 The concrete floor shall be a minimum of 100 mm thick and supported on a minimum of 200 mm of compacted hardcore, gravel or selected granular material. The fill shall be compacted in layers of 100 mm and the total compacted depth shall not exceed 1 m. Where a total compacted depth greater than 1 m is required, the floor shall be constructed as a suspended reinforced concrete slab; this will prevent cracking of the slab due to imperfectly compacted fill. See Figure 5-2 for details. 7.1.2.1.2 A 50 mm layer of sand blinding shall be applied over compacted hardcore to prevent damage to the damp proofing membrane. 7.1.2.2 Damp proof course 7.1.2.2.1 A damp proof course shall be provided to prevent ground water rising through the floor slab and load bearing walls. 7.1.2.2.2 Where polythene is used it shall be at least 0.15 mm thick and shall be laid over the final layer of compacted fill, or sand blinding where used. This material shall be used with caution as it easily broken. Laps in the damp proof membrane shall not be less than 150 mm. NOTE While polythene is the most commonly used damp proofing material used, other applications include asphalt and concrete screed.
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PCTTS 599: 20XX 120 Figure 7-1 Typical arrangement of s labs and beams Beam #1 Beam #1 Beam #1 Beam #1 Beam #2 Beam #3 Beam #4 Beam #3 Beam #4 Beam #3 Beam #2 Beam #2 Beam #1 Beam #1 Beam #2 Beam #4 Beam #3 Beam #3 Beam #3 Beam #4 Beam #3 Beam #3 Beam #3 Beam #6 Beam #5 Beam #6 Beam #8 Beam #7 Beam #7 Beam #2 Beam #4 Beam #2 Beam #4 Beam #4 Beam #1 Beam #1 Beam #1 Beam #1 Beam #1 Beam #1 Beam #1 Beam #1 Beam #1 Beam #3 Beam #3 Beam #3 Beam #4 Beam #4 Beam #2 Beam #4 Beam #4 Beam #2 Beam #8 Beam #8 Beam #6 Beam #6 Beam #8 Beam #8 Beam #6 Beam #8 Beam #8 Beam #8 Beam #6 Beam #8 Beam #8 Beam #8 Beam #6 Beam #5 Beam #7 Beam #7 Beam #5 Beam #7 Beam #7 Beam #6 2 way supported slab 1 way supported slab (e.g. joists & blocks) See Tables 6-2 and 6-4 See Tables 6-1 and 6-3
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PCTTS 599: 20XX 121 7.1.2.3 Reinforcement 7.1.2.3.1 The floor slab on grade shall be reinforced with welded wire mesh 150 mm × 150 mm × 3 mm. The mesh shall be located 25 mm below the top surface of the slab and care shall be taken during pouring that this location is maintained. 7.1.2.3.2 The mesh shall be tied to the ground beams where such beams are used. Minimum laps in the mesh shall be 150 mm. 7.1.3 Suspended Slab 7.1.3.1 Solid concrete slab Suspended slabs shall meet the span, thickness and reinforcement requirements given in Table 7-1 .
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