Trench Sheets (Trenching & Shoring) / 21
Manhole Shutters Pre-formed steel shutters for forming concrete surrounds to manholes. • Each manhole shutter is made up of a combination of the modular panel components listed in the table below (A, B & C) • Two panel heights of 900mm and 1800mm • Three panel sizes combine for manhole ring diameters from 675mm to 2700mm • Rapid assembly using simple pin-and-wedge systems
Thickness of Concrete Surround (mm)
Manhole Ring Wall Thickness (mm)
External Dia. of concrete (mm)
Modular Panel Components
Vol. of concrete required (m 3 )
Normal Int. Dia. of Manhole (mm)
A
B
C
900
1800
675 900 1050 1200
2 2 3 3 3 3 4 4 4 5 5 6 6 6
1
- - 1 1 - 1
1171
183 159 160 169
0.51 0.54 0.63 0.75 0.68 0.90 0.79 1.02 0.96 1.03 1.33 1.33 1.31 1.69
1.02 1.09 1.25 1.50 1.36 1.80 1.58 2.05 1.93 2.05 2.66 2.66 2.62 3.38
65
2
1368 1541 1738 1855 1935 2028 2107 2342 2632 2712 3002 3316 3396
75
-
85
1
100
2 2
141 181
1350
112
- -
1 2
150 189 156 146 186 166 146 186
1500
115
1800
2
- - 1 1 - 1
115
1 1 -
2100
120
2400
135
2 2
2700
162
Panel height
Panel Reference
Panel Width (mm)
Panel Weight (kg)
1800 1800 1800
1530 620 250
66 36 27
A
B C
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