Anchorage With Force Screw; Ancoraggio A Sbadacchio; Bracing Anchorage - Marcegaglia Buildtech Realpont system 75 Instruction Manual

Anchorage with force screw

ERECTION PLAN
Effected according to the following layout
metal
decking
In special cases, when other types of anchorages are not permitted, force
screws can be used, provided their working is checked and monitored
while in use.
The risk in using these types of anchorages lies in the difficulty of deter-
mining the resistance that such anchorages can guarantee.
The resistance of the anchorage is in proportion to the force that the
screw is able to ensure and to the friction coefficient lying between the
wall and the force plate.
To correctly define the load of force, load cells placed the bases may
be used. However, such a solution is costly and only justifiable for very
particular types of work.
An alternative solution consists of determining whilst work is in pro-
gress the actual resistance RR on a trial anchorage and using a calcula-
tion of permissible resistance: R
WARNINGS
It is recommended to connect the anchorage tube as near as possible to
the force screw or at the extremity of the tube in order to avoid bending
the tube itself.
scaffolding frame
=R R /2.
c

Ancoraggio a sbadacchio

ERECTION PLAN
A monolateral constraint, resistant only to erected compression as laid
out in the following diagrams.
metal
decking
LOADS
The bracing anchorage may only take orthogonal compression loads
on the façade. The F load acting on each orthogonal anchorage on the
1
scaffolding façade is determined in accordance with the calculations
detailed in the project and the regulations in force. The F
made up of two addends:
F = F + F
1 1a 1b
F = compression component on the anchorage caused by orthogonal
1a
wind pressure on the scaffolding façade
F = compression component on the anchorage arising from the structu-
1b
ral geometry. For example, the horizontal component of the load carried
by the brace of the jutty, shown in 'Erection plan - Bracing anchorage".
CHECKING THE ANCHORAGE SUBJECT TO AN F
The checks to be carried out are the following:
• joint creep check:
F < R
1
• compressive strength check of the anchorage tube:
L = free length of the anchorage tube
L
Instruction manual Prefabricated frames
41
•
scaffolding frame
load can be
1
LOAD
1