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Light Gauge Steel frames are extremely accurate (+/- 0.5mm) and tolerances are quite tight so it is important to get foundations and slabs as level as possible.
Differences in slab levels can result in the misalignment of frames.
NASH provide slab flatness tolerances of +/- 2mm and packing is required with out-of-tolerance of 3mm or more.
Packers must be used under all load-bearing studs when the slab is out of tolerance.
Packers need to have high compressive strength suitable for the purpose and made of a suitable inert material (typically plastic). The packer should cover the width of the frame and fully support the stud.
Minor undulations can be levelled using more spacers but major variations from level may need to be ground flat.
The following image shows shim packers from Uni Packers
Featured Topic
Pre Site Checklist
In this topic we look what needs to be checked prior to frames being delivered on site.