Origin of the 2% Bracing Rule
Origin of the 2% Bracing Rule
(OP)
Engineers often brace compression members with bracing elements capable of resisting 2% of the axial force in the compression member.
Does anyone know how this rule of thumb was derived? Is it based on an assumed amount of misalignment / load eccentricity perhaps?
Given how universally this rule of thumb seems to be applied, I would find if comforting to know how it was developed.
Any insight would be greatly appreciated.
Thanks,
Kootenay
Does anyone know how this rule of thumb was derived? Is it based on an assumed amount of misalignment / load eccentricity perhaps?
Given how universally this rule of thumb seems to be applied, I would find if comforting to know how it was developed.
Any insight would be greatly appreciated.
Thanks,
Kootenay






RE: Origin of the 2% Bracing Rule
RE: Origin of the 2% Bracing Rule
RE: Origin of the 2% Bracing Rule
Clansman
If a builder has built a house for a man and has not made his work sound, and the house which he has built has fallen down and so caused the death of the householder, that builder shall be put to death." Code of Hammurabi, c.2040 B.C.
RE: Origin of the 2% Bracing Rule
Mike McCann
MMC Engineering
RE: Origin of the 2% Bracing Rule
Natural material variations and out-of-straightness in real beams generate small P-delta effects - the 2.5% (or 2% in the US) restrains against these.