Reducing Slabs

Milton Precast reducing slabs are manufactured to suit up to and including 4000mm chamber sections are generally manufactured with a 900mm, 1050mm or 1200mm circular reducing section.

1500mm to 3000mm reducing slabs are Kitemarked to BS EN1917/BS 5911-3, the 3660mm and 4000mm are not covered by the British Standard but comply with all the relevant provisions it contains.

Type 1 Reducing Slabs

Nominal Size
(mm)
Access DN
(mm)
Slab Depth
(mm)
Overall Depth of Upstand
(mm)
Slab Diameter Depth of overhang from bottom
(mm)
Weight per Unit (tonne)
Top Bottom
(mm) (mm)
1500 900 175 250 1920 1860 25 1.030 *
1500 1050 175 250 1920 1860 25 1.060 *
1800 900 175 250 2230 2170 25 1.430 *
1800 1050 175 250 2230 2170 25 1.460 *
1800 1200 175 250 2230 2170 25 1.500 *
2100 900 178 250 2515 2515 25 2.120 *
2100 1050 178 250 2515 2515 25 2.150 *
2100 1200 178 250 2515 2515 25 2.190 *
2400 900 178 250 2870 2870 25 2.865 *
2400 1050 178 250 2870 2870 25 2.890 *
2400 1200 178 250 2870 2870 25 2.930 *
2700 900 203 250 3175 3175 25 3.940 *
2700 1050 203 250 3175 3175 25 3.975 *
2700 1200 203 250 3175 3175 25 4.005 *

Type 2 Reducing Slabs

Nominal Size
(mm)
Access DN
(mm)
Slab Depth
(mm)
Overall Depth of Upstand (mm) Slab Diameter Depth of register
(mm)
Weight per Unit (tonne)
Top Bottom
(mm) (mm)
1500 900 135 250 1710 1760 15 0.660
2100 900 178 250 2370 2370 15 1.620
2400 900 178 250 2700 2700 15 2.180
2700 900 203 250 3020 3020 15 3.110
3000 900 225 250 3350 3350 25 4.490
3000 1050 225 250 3350 3350 25 4.731*
3000 1200 225 250 3350 3350 25 4.768*
3660 (2-piece) 900 275 275 3960 3950 15 7.635
3660 (2-piece) 1050 275 275 3960 3950 15 7.480*
3660 (2-piece) 1200 275 275 3960 3950 15 7.296*
4000 (2 piece) 900 275 275 4500 4490 15 10.000*
4000 (2 piece) 1050 275 275 4500 4490 15 9.760*
4000 (2 piece) 1200 275 275 4500 4490 15 9.580*

Please note that all weights are estimated

Tel: (01795) 425191
Fax: (01795) 420360
E-Mail: sales@miltonprecast.com

Milton Pipes Limited, Milton Regis, Sittingbourne, Kent. ME10 2QF