Clear Opening
The clear opening is the unobstructed opening inside the frame, see Figure 6. The clear opening of the frame must be equal to or larger than the clear opening of the pit.
Dimensions
Dimensions are given as width (W) by length (L). Refer to ACO Access brochure for the complete dimensions of all the Urbanfil & Pavermat covers available.
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Figure 6 - Clear Opening
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Rebate Dimensions
To support the anticipated loads, the rebate must be cast according to Figures 7, 8 & 9. For ACO’s standard installation recommendations, click here.
Figure 7 – Class A Rebate
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Figure 8 – Class B Rebate
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Figure 9 – Class C Rebate
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Concrete Specification
- Minimum compressive strength of 32 MPa at 28 days
- Minimum cement content of 400 kg/m3
Load Class
Select the correct Urbanfil galvanised steel access cover to suit the required load class and application, refer to pages 6-9 in the ACO Access brochure for further details.
Covers & Frames
Covers and frames are a matching pair and should never be mixed with other covers and frames as the seal may be compromised.
Urbanfil Lifting Keys
It is important that the Urbanfil lifting key and locking (14mm allen) key are used, see Figure 10 and 11. To remove an Urbanfil cover, remove the locking bolts using the locking key from each corner and insert two short handle lifting keys in adjacent corners and rotate clockwise a quarter turn. Then lift both lifting keys and slide the cover out. Note square covers will fit diagonally through the frame so care should be taken not to drop the cover through the clear opening.
Figure 10 – Short Handle Lifter
Part No. 84306
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Figure 11 – Locking (14mm Allen) Key
Part No. 84313
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Decorative Edging
A strip of brass can be fixed to the edge of the cover and frame for an attractive finish, see Figure 12.
For these applications, keyhole bosses will also have extensions to match the decorative edge. The top of the decorative edge corresponds with the finished floor level of the cover.
Infill Materials
For Urbanfil covers, a maximum tile depth of 25mm is recommended.
For Pavermate covers, a maximum paver depth of 40mm is recommended.
Tiles or pavers positioned on the cover and in the first course outside the frame must be fully restrained and bonded to the concrete bed. An epoxy mortar is recommended. |
Figure 12 –
Decorative Edging
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Site Support
Dependent on the location of the installation, ACO can provide supervisory support if requested.