A four-pile group supports a 500 mm square column which carries a factored load of 2800 kN. The piles are 450 mm in diameter and spaced at 1350 mm centres.
Assume a pilecap depth of 800 mm. Allow the pilecap to extend 150 mm beyond the edge of the piles, to give a base 2.1 m square as shown in Figure 7.7.
For components in non-aggressive soil and/or water, exposure class is 2(a).
Minimum concrete strength grade is C30/37.
For cement content and w/c ratio refer to ENV 206 Table 3.
Minimum cover to reinforcement is 30 mm.
Use 100 mm nominal bottom cover over piles and 50 mm sides
Table 4.1 ENV 206 Table NA.1
NAD Table 6
Type 2 deformed reinforcement with f = 460 N/mm2 NAD 6.3(a) Concrete strength grade C30/37 with maximum aggregate size 20 mm.
184.108.40.206 Element classification
A beam whose span is less than twice its overall depth is considered a deep 220.127.116.11(2) beam.
With the effective span, I taken to the centre of the piles: 18.104.22.168.2
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