1. ESS Concrete Pit Lids

2. Pit Lids Context

3. Pit Lids Context
This is the Maintenance Cell, which has a number of pits in.
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4. Pit Lids Context
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5. Pit Lids Context
This image shows all of the Pit Lid Sections, as Pit Lid A is replicated across all. The next slide shows each in closer detail.
2.9m
4.6m
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6. Pit Lid Variants
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7. Pit Lid Construction Currently 12mm cladding stainless steel
40mm base plate stainless steel
Grapple Interface (stainless) with tie rods (D45) to base plate
Heavy concrete (Magnadense equivalent) internal
Rebar design similar to as shown
6mm profile tolerance for cladding
Up to 23T when filled
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8. Rebar construction
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9. Prototype
Single prototype of a pit lid section to be manufactured initially to check manufacturing tolerances, lifting features and load bearing capability.
RACE to have close collaboration with manufacturers to monitor challenges of assembly process
Also part of the prototype package:
Locating ring
Reinforcement bar
Grapple test piece
Concrete pour
For more information on prototype, see market enquiry.
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10. Prototype assembly The draft assembly sequence for the prototype:
Welding 12mm stainless steel plate into cladding sides
Machine 40mm base plate
Place rebar cage onto base plate
Install tie rods and grapple interface into base plate
Weld up sides of cladding to complete outer shell
Perform testing and inspection
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11. Full scope
Full scope is to manufacture all pit lids once prototype has been completed. This is a separate procurement and call for tenders to be released at a later stage.
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