
System assembly instructions | Letterbox A-625
10 I English
The assembly set shown in Table 13 and the corresponding tools are required to assemble the system with the
Terzoposts.
Table 13: Assembly set for connecting the system to the Terzo post
Complete the following steps to connect the pre-assembled
system and the crossbar to the Terzo post:
1. Hand-tighten the cylinder screw and rivet nuts on the
system and the crossbar. For this purpose, use the holes
drilled on the system and the Terzo post in accordance
with Table 12 in Step 5.1.2. Optionally, a crossbar can be
attached to a system in accordance with Table 12. In this
case, repeat these steps for the crossbar as well.
2. Place the pre-assembled system carefully on its upper surface. We recommend covering the oor with board/
cardboard beforehand to protect the system from scratches and damage. Screw the Terzo posts and, if installed,
thecrossbar to the system as shown. Tighten screws, be careful not to over-tighten!
Over-tightening can damage parts and considerably impair the retention force.
Note: The assembly is carried out with a crossbar in the illustrations below. If you do not want to use a crossbar,
please skip the corresponding steps.
When assembling the system with Terzo posts, it is essential to rst screw the system together and then t the Terzo posts
to the system.
• Continue to Step 5.1.4 to install the system with the optionally available Terzo bases on a concrete foundation.
• Continue to Step 5.1.5 to assemble the system by casting the Terzo posts in concrete.
The following steps refer to the assembly of the system using the optionally available Terzo bases, which connect the
system to a concrete foundation.
Plan an area of at least 500 x 500 mm for the concrete foundation with a depth of at least 800 mm for each Terzo post,
depending on the local frost threshold. The foundation size is to be increased depending on the local condition of the soil.
It is recommended to spread a layer of crushed stone underneath the concrete foundation. Backll the excavated area
with concrete and compress. Note the minimum period of time for the hardening of the concrete before the foundation
and the system is fully loaded. Concrete with a minimum compressive strength class of C25/30 is recommended.
Assembly of the system on an insecure foundation is not permitted. When laying the foundation, ensure that it is
horizontally level. Check the evenness of the foundation with a spirit level before assembly. If the foundations are
separated, also ensure that the levels are aligned with each other.
1. Mount the Terzo bases using the three M8 countersunk screws supplied:
2. Set up the system with at least two people. Do not lift/carry using the Terzo posts when setting up!
Note: Align the system vertically and horizontally using a spirit level.
Then mark three boreholes per base on the concrete foundation and place the system to one side again. Ensure that
the system cannot fall over, otherwise lay the system on its back wall again (on cardboard or similar). Drill the marked
holes at least 10 mm deeper than the dowel length. Insert the dowels so that they are ush with the surface.
3. Use at least two people to align the system over the drilled holes. Ensure that the system cannot be tilted or twisted.
Tighten both bases rmly using three of the M8 cylinder screws supplied.
Tighten the screws alternately to prevent tilting.
Step 5.1.3: Assembly of the system with the Terzo posts and optional crossbar Step 5.1.4: Assembly of the system with Terzo bases on a concrete foundation
Assembly set Necessary tools
8x 8x Wrench size 3 / M4
Crossbar (optional)A-letterbox
8x
Assembly set Necessary tools Assembly of the Terzo bases
with the Terzo post
3-4x
Ø12.0 mm
3x 3x 3x
3x 3x
PH 4
Wrench
size 6 /
M8
3x