Chamber Rings

Milton Precast standard chamber rings are manufactured with tongue and groove joints and comply to BS EN 1917:2002/BS 5911-3:2010 and are designed to hold a flexible jointing strip such as tokstrip and are supplied with three nominal 50mm diameter holes for lifting purposes

Milton chamber sections can be supplied with or without double steps/rungs or an integrated ladder system as well as with holes or cut-outs.

For safety reasons, all chamber sections are loaded and delivered chimney fashion, when offloaded they should never be stored on their side (on the roll), but should always be laid flat.

Lorries with crane off load facilities are available for manhole units up to and including DN3000, upon request. Suitable lifting bolts for offloading and handling purposes can be purchased from Milton Precast and come with appropriate test certificate.

Designers and users should ensure that they have taken into account the current requirements for manhole access as detailed in the Health and Safety Code of Practice, Regulations and Guidance issued by the Health and Safety Executive under the Confined Spaces Regulations 1997 and other relevant requirements.

Tongue and groove joint DN Available depth of section Approx wall thickness mm O.D. mm Approx weight/m depth kg
0.25m 0.5m 0.75m 1.0m
900 70 1040 530
1050 80 1210 710
1200 90 1380 912
1350   95 1540 1080
1500   105 1710 1330
1800   115 2030 1760
2100   125 2350 2140
2400   140 2680 2740
2700   150 3000 3400
3000   165 3330 4140
3660+     185 4030 5300
4000+     200 4400 6360

+ DN 3660 and DN 4000 are not covered by the British Standard (not kitemarked), but comply with all the relevant provisions of the European Standard. DN4000 is supplied in 2 halves.

Chamber Ring Capacity

Nominal Internal Dimeter
  900 1050 1200 1350 1500 1800 2100 2400 2700 3000 4000
Litres/metre depth of chamber ring 656 894 1167 1478 1824 2544 3464 4524 5725 7069 12566

1Litre = 0.001m³

Recommended minimum chamber diameters to suit pipe sizes

Largest Pipe
DN
Chamber
DN
Less than 375
375 - 450
500 - 700
750 - 900
1200
1350
1500
1800

Jointing

Tongue and groove joint provided can be sealed using a joint can be made using Miljoint butyl resin sealant available from Milton Precast.

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

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