Checking Instability; Bracing Anchorage - Marcegaglia Buildtech Realpont system 75 Instruction Manual

Bracing anchorage

λ = _____ from which ω is derived from the tables of existing
standards and regulations.
i

Checking instability

F
1
σ = ω x _____ < σ1
A
• compressive strength check of the regulating screw
Limit the screwing out of the screw within a maximum of 15 ÷ 20 cm in
order to omit factors of instability and only carry out resistance checks.
F
1
σ = ω x _____ < σ1
A
• check the wooden planks distributors
Place a wooden plank underneath the base of the regulating screw to act
as a load distributor
S = 5 cm plank thickness
A L = 400 cm² 20 x 20 cm plank
σL = 60 daN/cm² permissible stress on the wooden plank
Resistance check:
F
1
σ = _____ < σ L
A l
WARNINGS
For bracing anchorages, it is recommended to carry out the following:
• check the correct positioning, the quality and the efficiency of the
wooden planks under the base acting as the load distributors
• limit the screwing out of the regulating screw to never exceed 20 cm
• check the proper dismantling of the joints so as to guarantee creep
resistance.
Instruction manual Prefabricated frames
42
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