MANHOLE CHAMBER

Product Overview

Our precast manhole chambers are engineered solutions designed for long-lasting performance in sewer and drainage systems. Manufactured using high-grade concrete (M30–M40), these chambers are precision-cast to withstand environmental stressors and heavy loading conditions, offering consistent strength, durability, and installation efficiency.

Components
  • Base Section: Forms the foundation and connection point for pipe inlets/outlets.
  • Riser Section: Enables custom depth adjustments from ground level to the base.
  • Cone Section: Tapers the opening for access covers and ensures surface-level stability.
Key Features & Technical Specifications
  • Internal Diameter Range: 600 mm to 1500 mm
  • Cone Height: 1200 mm to 1400 mm
  • Standard Base Height: 1000 mm
  • Riser Height Options: 200 mm to 1500 mm
  • Concrete Grade: M30 to M40
Load Class Options
  • Medium Duty: Suitable for earth pressure, groundwater hydrostatic pressure, and light vehicular traffic.
  • Heavy Duty: Designed for areas with direct heavy vehicle loads and higher surcharge demands.

Note: For internal diameters exceeding 1500 mm, a cast-in-situ base is required, followed by a precast riser adaptor.

Manufacturing Process

Manufactured using mechanized steel moulds and low water-cement ratio concrete, each unit is reinforced with pre-fixed rebar. The concrete is consolidated using high-frequency vibration to eliminate voids and ensure uniformity.

Testing Includes
  • Concrete cube testing for strength
  • Slump tests for mix consistency
  • Post-demoulding inspections for surface integrity
  • Rejection of any unit with visible cracks, honeycombing, or air voids
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