Installation
SiEN34-705
20
General Information
3.2 Work Involved in Individual Operations and Points to be
Borne in Mind
3.2.1 Sleeve and Insert Work
!
Operational steps
Positioning of the
Pipe Holes
a) The through holes for the drain piping should be positioned such that the pipes have a
downward gradient. (The gradient must be at least 1/100. The thickness of the insulating
materials must also be taken into consideration.)
b) The diameter of the through holes for the refrigerant piping should include an allowance for
the thickness of the heat insulation materials. (It is a good idea to think of the liquid and gas
pipes as pairs.)
c) Attention should be paid to the construction of the beam themselves since there are
sometimes parts of the beam which cannot be used to accommodate through holes.
Example:
Through holes in a reinforced concrete beam
Positioning the
Insert
a) An insert is a metal tool which is inserted into a floor or a beam before the concrete is set
such that fittings such as ducts, pipes or suspension bolts for hanging units can be fitted into
place later.
The positions of the inserts must be decided early.
Example:
Steel insert
Important point:
1. The weight of the fitting to be suspended must be taken into account when choosing the
insert.
Preliminary talks
with
construction
company
Determine
position, size and
number of units
required
Carry out work
Check work
(V0957)
Pillar
D/4
(at least 150mm)
Part of beam
wich must not be piersed
Beam D
Molding box
Suspension bolt
Insert block
Nail securing
molding box
Embedding
depth h
