edges, drainage channels
The concrete of passable areas intended for the foundations and back supports should correspond to the concrete quality C 20/25, for walkable areas C 16/20 is sufficient. The back support is to be made in shell form. Information on the height and design of the back support is given. Minimum pressure resistance requirements as in the old version of ATV DIN 18318 have been abolished.
Foundations should be ≥ 200 mm thick for passable areas and ≥ 80 mm thick for walkable areas.
Back supports should be 150 mm ± 20 mm thick on drivable areas and 80 mm ± 20 mm thick on walkable areas.
Curbs and edging stones should have joint widths corresponding to the unbound construction and do not have to be grouted.
The minimum longitudinal gradient of drainage channels must be ≥ 0.5%. Deviations in flatness, measured with the 4 m staff, may reach 5 mm.
Drainage channels are to be produced with joint widths of 10 mm ± 5 mm, when using rough stone pavement made of natural stone of 15 mm ± 5 mm.
The joints must be filled with grout up to at least 4 mm and at most 1 mm below the upper edges of the paving stones and slabs or up to the lower edge of any chamfers, curves and the like.
In the case of adjacent borders, these are to be made with joint widths of 10 mm ± 2 mm.
With drainage channels, expansion joints must be made at a distance of ≤ 12 m, with drainage channels used (e.g. entrance to the yard) at a distance of 4 m to 6 m, consistently through the channel and foundation and back support. Adjacent borders are to be made adequately. Movement joints must be at least 8 mm and at most 15 mm wide and resilient.
If drainage channels also serve as edging, a back support must be made as before.
If street gullies are placed in the gutter, a movement joint must also be made in front of and behind each expansion joint.
Fringe benefits and special benefits are defined in detail.
The rules for billing are described. The rules of measurement are shown.
part 4 will be published on July 28th – Stay up to date and subscribe to our newsletter.
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