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Products / Manhole Shaft Ring Brick & Well Wall Brick Moulds

Municipal & Utility Mould Category

Manhole Shaft Ring Brick & Well Wall Brick Moulds

Curved ring brick moulds that build circular manhole shafts at inner diameters of 70, 80, 90, 110, 130 and 150 cm, plus straight and corner well wall brick moulds for rectangular chambers. The piece count per course is set by the mould arc — 7 bricks at Ø 70 cm, 11 at Ø 110 cm — so the ring closes without cutting on site.

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Dimensions verified from workshop photosPiece count matched to diameterCustom diameters from drawings
Plastic mould for curved concrete shaft ring brick, 11 bricks per 110 cm inner diameter ring, 20 cm high

Build the chamber, not just the cover

A precast manhole is two separate purchases. The cover and frame close the top; the shaft below it is built course by course from bricks. Casting those bricks yourself, on site or in a local yard, removes the freight cost of shipping heavy finished rings and lets one mould serve hundreds of chambers.

Zhihua supplies curved ring brick moulds for circular shafts and straight or corner wall brick moulds for rectangular inspection chambers. If you also need the cover and seating frame, see our manhole cover and well frame moulds.

ApplicationsMunicipal sewer and stormwater manholes, inspection chambers, valve pits, utility access shafts and drainage networks
Product scopeCurved ring bricks for Ø 70–150 cm shafts, straight well wall bricks, tongue-and-groove interlocking bricks and corner bricks
Standard course height20 cm for ring bricks; 17.3 cm and 19 cm for wall brick types
CustomizationAny inner diameter, wall thickness, course height, piece count per ring and tongue-groove profile from your drawing

Shaft Ring Brick & Well Wall Brick Moulds

Eleven verified moulds. Ring bricks are grouped by shaft inner diameter; wall bricks follow at the end. Covers and frames for the top of the shaft are on the manhole cover mould page.

Plastic mould for curved concrete shaft ring brick, 7 bricks per 70 cm inner diameter ring, 20 cm high

Shaft Ring Brick Mould · ID 70 cm · 7 pcs/ring

Curved shaft brick · 7 pieces per ring · inner Ø 70 cm · width 17.5 cm · height 20 cm

Plastic mould for curved concrete shaft ring brick, 8 bricks per 80 cm inner diameter ring, 20 cm high

Shaft Ring Brick Mould · ID 80 cm · 8 pcs/ring

Curved shaft brick · 8 pieces per ring · inner Ø 80 cm · width 18.5 cm · height 20 cm

Plastic mould for curved concrete shaft ring brick, 9 bricks per 90 cm inner diameter ring, 20 cm high

Shaft Ring Brick Mould · ID 90 cm · 9 pcs/ring

Curved shaft brick · 9 pieces per ring · inner Ø 90 cm · height 20 cm

Plastic mould tooling view for curved concrete shaft ring brick, 9 bricks per 90 cm inner diameter ring

Shaft Ring Brick Mould · ID 90 cm · 9 pcs/ring (mould view)

Curved shaft brick · 9 pieces per ring · inner Ø 90 cm · height 20 cm

Plastic mould for curved concrete shaft ring brick, 11 bricks per 110 cm inner diameter ring, 20 cm high

Shaft Ring Brick Mould · ID 110 cm · 11 pcs/ring

Curved shaft brick · 11 pieces per ring · inner Ø 110 cm · width 24 cm · height 20 cm

Plastic mould tooling view for curved concrete shaft ring brick, 11 bricks per 110 cm inner diameter ring

Shaft Ring Brick Mould · ID 110 cm · 11 pcs/ring (mould view)

Curved shaft brick · 11 pieces per ring · inner Ø 110 cm · width 24 cm · height 20 cm

Plastic mould for curved concrete shaft ring brick, 130 cm inner diameter, 23.5 cm wide, 20 cm high

Shaft Ring Brick Mould · ID 130 cm

Curved shaft brick · inner Ø 130 cm (R65) · width 23.5 cm · height 20 cm

Plastic mould for curved concrete shaft ring brick, 150 cm inner diameter, 24 cm wide, 20 cm high

Shaft Ring Brick Mould · ID 150 cm

Curved shaft brick · inner Ø 150 cm (R75) · width 24 cm · height 20 cm

Plastic mould for interlocking concrete well wall brick 30 x 15 x 17.3 cm with tongue and groove

Well Wall Brick Mould 30 × 15 × 17.3 cm

Straight well wall brick · 30 × 15 × 17.3 cm · tongue 11.5 × 4.5 / groove 10.3 × 3.3 cm

Plastic mould for straight concrete well wall brick 40 x 30 x 19 cm

Well Wall Brick Mould 40 × 30 × 19 cm

Straight well wall brick · 40 × 30 × 19 cm

Plastic mould for concrete well wall corner brick 32 x 18 x 17.3 cm for square inspection chamber corners

Well Wall Corner Brick Mould 32 × 18 × 17.3 cm

Corner well wall brick · 32 × 18 × 17.3 cm · matches 30 × 15 × 17.3 cm straight brick

Shaft Brick Mould Buyer Guide

Three numbers decide whether a ring closes: inner diameter, brick width and pieces per course. They have to come from the same drawing.

One mould equals one diameter

Each ring brick mould is cut to a single arc. That arc is what makes the course close into a true circle, and it is why the piece count is not a choice:

  • Ø 70 cm — 7 bricks per course, 17.5 cm wide
  • Ø 80 cm — 8 bricks per course, 18.5 cm wide
  • Ø 90 cm — 9 bricks per course
  • Ø 110 cm — 11 bricks per course, 24 cm wide
  • Ø 130 cm — 23.5 cm wide (R65)
  • Ø 150 cm — 24 cm wide (R75)

A Ø 90 cm mould will not build a Ø 110 cm shaft. If your project mixes diameters, you need one mould per diameter — that is normal, and mixed-SKU shipments are standard for us.

Inner diameter is not excavation width

Every diameter on this page is the inner diameter — the clear bore a worker climbs down. The outer diameter is the inner figure plus twice the brick width:

  • Ø 110 cm bore + 2 × 24 cm walls ≈ 158 cm outer
  • Ø 70 cm bore + 2 × 17.5 cm walls ≈ 105 cm outer

Trench and shoring width comes from the outer figure. Buyers who size excavation from the bore end up short by roughly half a metre on the large diameters.

Course height and reinforcement

Ring bricks here are 20 cm high, so a 3 m deep shaft is 15 courses. We do not publish load or depth ratings: those depend on your concrete mix, any vertical reinforcement threaded through the wall, and the surrounding backfill — not on the plastic mould.

MouldShaft inner ØPieces per courseBrick widthCourse height
Ring brick mould ID 7070 cm717.5 cm20 cm
Ring brick mould ID 8080 cm818.5 cm20 cm
Ring brick mould ID 9090 cm9—20 cm
Ring brick mould ID 110110 cm1124 cm20 cm
Ring brick mould ID 130130 cm (R65)—23.5 cm20 cm
Ring brick mould ID 150150 cm (R75)—24 cm20 cm
Well wall brick, interlockingStraight wall—15 cm17.3 cm
Well wall brick, largeStraight wall—30 cm19 cm
Well wall corner brickRectangular chamber corner—18 cm17.3 cm
Related: Manhole Cover & Well Frame Moulds Related: Drainage Channel Moulds Related: Cable Trench Moulds Related: Hollow Block Moulds

What to send for a fast quote

Shaft brick moulds are dimension-driven. Four figures let us confirm whether a catalogue mould fits or whether the arc has to be cut new.

  • Shaft inner diameter, or the chamber length × width if it is rectangular
  • Wall thickness (brick width) your design calls for
  • Course height — 20 cm is our standard for ring bricks
  • Whether you need interlocking tongue-and-groove or plain faces
  • Corner bricks required, and how many chambers in total
  • Quantity, destination country and whether diameters are mixed

Need shaft or wall brick moulds for a manhole project?

Send the shaft drawing or a photo of the brick you want to reproduce with its dimensions. We will confirm the arc, piece count and demoulding before quoting.

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Shaft Ring & Well Wall Brick Mould FAQ

How many ring bricks do I need per course, and how is that decided?

It is fixed by the mould, not by you on site. Each ring brick mould is cut to one arc, so a Ø 70 cm shaft takes 7 bricks per course, Ø 80 cm takes 8, Ø 90 cm takes 9 and Ø 110 cm takes 11. The pieces only close into a circle at their own diameter, so a Ø 90 cm mould cannot be used to build a Ø 110 cm shaft.

Is the diameter you quote the inner diameter or the outer diameter?

Inner diameter — the clear bore of the finished shaft. Add twice the brick width for the outer size: a Ø 110 cm shaft with 24 cm wide bricks measures about 158 cm across the outside. Excavation width is sized from the outer figure, so always confirm which one your drawing uses before ordering.

What is the difference between shaft ring bricks and well wall bricks?

Ring bricks are curved segments for circular shafts and only fit one diameter. Well wall bricks are straight rectangular units, used for square or rectangular inspection chambers and for straight wall runs; the 30 x 15 x 17.3 cm unit has a tongue and groove so courses interlock, and the 32 x 18 x 17.3 cm corner brick turns the corner while keeping the same course height.

Can you make ring brick moulds for a diameter that is not listed?

Yes. Give us the inner diameter, the wall thickness you want and the course height, and we set the arc and the piece count so the ring closes exactly. Odd diameters are routine work; what matters is that all three figures come from the same drawing.

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