SPEL Vortceptor, Installation Manual

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12 Installation Manual
Vortceptor
TABLE 1
External Anti Floatation Ribs:
The wetwell bottom is designed to BS4994 to any
resist buckling of the wetwell bottom from external
water pressure and internal pressure, in the installed
condition with a compacted base to (Figure 1, below)
and the perimeter of the wetwell including the anti-
floatation Ribs embedded in concrete.
This table must be followed for the concrete slab
design for all wetwalls with fibreglass external ribs.
COLUMN 1 COLUMN 2 COLUMN 3 COLUMN 4 COLUMN 5
Wetwell
Dia.
mm Reinforcement REO BAR
(In Center of
Slab, Ref-Figure 1.) Required Slab
Extension
Around
Wetwell (mm) Slab Thickness
(mm) Required Ballast
Extension
Around
Wetwell (mm) Ballast Height
(mm)
1200 1 @ 1800mm Dia. N12 400 200 300 400
1520 1 @ 1920mm Dia. N12 500 200 350 500
1850 1 @ 2250mm Dia. N12 &
1 @ 2650mm Dia. N12 550 200 400 600
2200 1 @ 2600mm Dia. N12 &
1 @ 3000mm Dia. FN12 700 200 500 700
2470 1 @ 2900mm Dia. N16 &
1 @ 3300mm Dia. N16 800 250 500 800
3000 1 @ 3400mm Dia. N16 &
1 @ 3800mm Dia. N16 900 300 700 1000
3500 1 @ 3900mm Dia. N20 &
1 @ 4800mm Dia. N20 1000 300 700 1200
4000 1 @ 4400mm Dia. N20 &
1 @ 4900mm Dia. N20 1100 350 750 1400
• These slabs are designed to AS3600.
• In some cases the slab and/or reinforcing design
is controlled by temperature requirements and in
other cases by flexure.
• Use minimum 20Mpa concrete.
• Since some of the slab designs are controlled
by temperature, the slab thickness should not
be increased without the approval of a Design
Engineer.
FIGURE 1