Warnings - Marcegaglia Buildtech Realpont system 75 Instruction Manual

Tie anchorage
CHECKING THE ANCHORAGE SUBJECT TO AN F
Checks to be carried out are the following:
• joint creep check:
F < R
1
• tensile strength check of the anchorage tube:
F
1
σ = _____ < σ1
A
• compression strength check of the anchorage tube
L = the free length of the anchorage tube
L
λ = _____
i
The value of ω in relation to λ is determined according to regulations in
force.
• instability check
F
1
σ = ω _____ < σ1
A
Should the instability check not pass the test, the anchorage tube must
be sectioned making use of tube-couplers or the anchorage tube must be
doubled.
CHECKING THE ANCHORAGE SUBJECT TO AN F
The whole scaffolding's F load can be absorbed by a number of C type
2
anchorages strategically distributed on the scaffolding façade, but prefe-
rably, barring any obstacles, along the scaffolding outer piers.
Placing n the number of C type anchorages on the scaffolding, the acting
load on each will be: F*= F /n.
2
Load acting on a single anchorage tube with an inclination of α:
F*/2
Fd = _____
cos α
L= the free length of the anchorage tube
L
λ = _____ from which is determined ω
i
F
d
σ = ω _____ < σ1
A
LOAD

WARNINGS

1
When using tie anchorages, it is recommended to carry out the fol-
lowing:
• check the correct hold of the anchorage joints to ensure creep resistan-
ce;
• connect the anchorage tubes in line with the structural nodes of the
scaffolding;
• insert wooden planks as load distributors between the tie anchorage
tube side/edge and the structure of the building being worked on to
avoid contact stress peaks (Hertzian pressure), which could otherwise be
damaging to the structure.
LOAD
2
Instruction manual
38
Prefabricated frames
•