When assessing surface regularity in FM areas it is not possible to survey an infinite number of points, therefore a representative sample of the floor is surveyed on a 3 metre grid.
Table 3.1: Permissible 95 percentile values on Properties E and F.
|Typical floor use
|Where very high standards of flatness and levelness are required.
Reach trucks operating at above 13m without side-shift.
|Reach trucks operating at above 8 – 13m without side-shift.
|Retail floors to take directly applied flooring. Reach trucks operating at up to 8m without side-shift.
Reach trucks operating at up to 13m with side-shift.
|Retail floors to take applied screeds.
Workshops and manufacturing facilities where MHE lift heights are restricted to 4m.
|Note: Side-shift is the ability of a truck to adjust the pallet transversely to the fork direction.
Properties E and F are checked as well as a check to datum
Property E to control levelness is the elevational difference in millimetres checked directly between fixed points 3m apart on a grid over the entire floor area. (not across diagonals)
Property F to control flatness, this is the change in elevational difference between two consecutive measurements of elevational difference each measured over 300mm.
No point on the Property E survey grid is to exceed +/- 15mm of a fixed datum plane
Table 3.1 shows an extract from the UK Concrete Society’s Technical Report 34.
If your warehouse floor needs to meet Concrete Society’s TR34 Free Movement classification, whether FM1, FM2, FM3, or FM4, contact Face Consultants today and speak to one of our concrete flooring specialists.
With many years of experience around the globe, we’re your trusted partners in delivering first-class solutions for free movement warehouses.
Measuring Property E (and Datum check) using an Optical Level and Parallel Plate Micrometer, taking readings from an Invar Staff to 0.1mm.
Measuring Property F on site with our Property II Meter.
The Concrete Society’s TR34 Free Movement (4th Edition) Classifications
can be checked to ‘BS 8204-2:2003+A2:2011’ straight edge specifications SR1, SR2 and SR3
Please contact us if you have any questions about our floor testing or design & consultancy services.
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