Translated user manual (EN-V1)
BENOMIC S500
23 / 57
7.3
Minimum requirements for the pipe-rail system
Stability tests have shown that with unfavourable combinations of pipe-rail type and
support spacing on the pipe-rail system, constraints must be applied for the maximum
permissible load. See 10.1 Explanation of the technical specifications.
The
BENOMIC S500
is based on a pipe-rail system as described in the Dutch ARBO
catalogue. Briefly, the following key principles apply:
-
A pipe-rail system means that each path between the crops has a track comprising two
pipes of the same diameter and with a fixed width between them (centre-to-centre
(c.t.c.) size).
-
The pipes are often used as heating pipes and are supported with fixed spacing
between them. These supports are subject to a minimum requirement of a 1.5 mm
thick steel base plate (with a stiffening profile), a minimum width of 115 mm and with
enough length to ensure that the base plate protrudes at least 70 mm from the two
upright supports that carry the pipes.
-
The pipes must be steel quality (S235) with pipe diameter and wall thickness of 51/2,25
mm or 45/2 mm respectively.
-
The pipes must be anchored into the concrete path. They must not be free-standing!
-
Regardless of the pipe-rail system, the requirement is that a maximum support spacing
of 1 metre is applied in the last 10 meters!
-
At the end of the pipes (in front of the façade), there should be a welded stop with a
height of at least 5 cm. These should be checked once for every change of season to
ensure that the stops are not flattened, bent, skewed or cracked.
-
The surface under the pipe-rail system should be sufficiently load-bearing. This is
based on a top-layer cone penetration test value of more than 0.4 Mpa (62 psi). It is
important to keep the surface dry, flat and therefore hard. Soft/wet spots must be
repaired and any subsidence must be permanently resolved.
-
The pipe-rail system must have a maximum tilt of 2 degrees, both lengthwise and
width. This makes it important to check the pipe-rail periodically.
The specifications that the-pipe rail system must meet for safe use of the BENOMIC S500
are defined in 10.1 (Explanation of Technical Specifications).
