The Concrete Society’s TR34 Free Movement (4th Edition) Classifications

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.

TR34

Table 3.1: Permissible 95 percentile values on Properties E and F.

Floor Class Typical floor use Property
    E F
FM1 Where very high standards of flatness and levelness are required.
Reach trucks operating at above 13m without side-shift.
4.5 1.8
FM2 Reach trucks operating at above 8 – 13m without side-shift. 6.5 2.0
FM3 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.
8.0 2.2
FM4 Retail floors to take applied screeds.
Workshops and manufacturing facilities where MHE lift heights are restricted to 4m.
10.0 2.4
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.

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The Concrete Society’s TR34 Free Movement (4th Edition) Classifications

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