Standard Waste Water Manholes of precast concrete elements
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This document provides specifications for precast concrete manholes used for waste water. It lists the materials used to construct the manhole, including the bottom slab, blinding, channel/gutter, landing, concrete shaft rings, taper shaft ring, support ring and leveling course. It specifies the class and standards for the concrete, reinforcement and cement mortar. All joints must be sealed with rubber seals or waterproof cement mortar. Support rings of up to 28cm in height can be used under the manhole cover, along with a leveling course of up to 5cm thick concrete.
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Standard Waste Water Manholes of precast concrete elements
- 1. STANDARDWaste Water MANHOLES OF PRECAST CONCRETE ELEMENTS Materials: The manhole consists of: Bottom Slab: C35/45 DIN EN 206, DIN 1045 Blinding: C12/15 DIN EN 206, DIN 1045 Channel / Gutter: precast, half-round element or in-situ concrete rendered with cement mortar Landing: in-situ concrete Concrete Shaft Ring: DIN V 4034/DIN EN 1917 Taper Shaft Ring: DIN V 4034/DIN EN 1917 Support Ring: DIN V 4034/DIN EN 1917 Leveling Course: in-situ concrete C 25/30 DIN EN 206, DIN 1045 Manhole Cover with Ventilation Openings: DIN 1229 and DIN EN 124, Class D Step Irons: Made of cast iron as per DIN 1211, DIN 1212 and DIN EN 13101 or of plastic-coated steel Reinforcement: DIN EN 206, DIN 1045, BSt 500M Reinforcement for Handling: DIN 488/ DIN EN 10080, reinforcing steel BSt 220/340 RU Cement Mortar: DIN EN 206, DIN 1045
- 2. MODULAR UNITS MODULAR UNITS, BASES, RINGS & CONES
- 3. Prefabricated manholes All joints are to be sealed with special rubber seals or watertight cement mortar as per DIN EN 206, DIN 1045, made from a mixture of cement (DIN 1164-10; DIN EN 196; DIN EN 197), concrete aggregates up to a maximum of 4 mm (DIN EN 12620), and proper, suitable water. Mixing proportions: Cement: aggregates = 1:3. A support ring is to be installed between the taper shaft ring and the shaft cover. If more than one support ring is used, the total height of the rings may not exceed 28 cm. In principle, no more than two support rings should be used. Since the support rings alone generally do not allow for exact adaptation to the terrain height, a leveling course of in- situ concrete is also envisaged, the maximum thickness of which will be 5 cm. The maximum height of the support rings (as a rule, two rings) and the leveling course is 28 cm. The step irons should be fixed by the manufacturer of the concrete elements.
- 4. RUBBER SEALING GASKET RUBBER SEALING GASKET
- 5. RUBBER SEALING GASKET CORRUGATED PE PIPE