Design of connector spacers for Double Angle
Design of connector spacers for Double Angle
(OP)
Hi all,
We have a project regarding retrofitting of communication towers wherein I'll add an aditional angle bar to an existing diagonal member which is an angle bar as well of the same size. So the resulting section is a double angle. Now regarding the spacers to be place along the length of this double angle, of course after computing the required spacing base on AISC, I am planning to connect the spacers to the double angle section by means of bolts. The question is how will I know the right size of spacer and bolt/s to apply (i.e. the dimension and thickness of the spacer and the diameter of bolt to use)?
Thanks in advance to those who can enlighten me on this matter.
We have a project regarding retrofitting of communication towers wherein I'll add an aditional angle bar to an existing diagonal member which is an angle bar as well of the same size. So the resulting section is a double angle. Now regarding the spacers to be place along the length of this double angle, of course after computing the required spacing base on AISC, I am planning to connect the spacers to the double angle section by means of bolts. The question is how will I know the right size of spacer and bolt/s to apply (i.e. the dimension and thickness of the spacer and the diameter of bolt to use)?
Thanks in advance to those who can enlighten me on this matter.






RE: Design of connector spacers for Double Angle
BA
RE: Design of connector spacers for Double Angle
Regards
RE: Design of connector spacers for Double Angle
The article is available at: http://msc.aisc.org/globalassets/modern-steel/arch....
The brackets in the equation do not appear correctly in the on-line version of the article. The equation should read:
Fs = (α2/α2+1)*Py*(1-Pcr/Py)
RE: Design of connector spacers for Double Angle
RE: Design of connector spacers for Double Angle
When calculating the capacity of the double angle member by CSA S16, replace the actual length with an equivalent length Le which accounts for the slenderness of the component angles between connectors.
Le = rx or y√[(KL/rx or y)2 + (KS/rz)2]
where L is the length of the double angle and S is the spacing of connectors; Le is the equivalent length for design purposes.
BA
RE: Design of connector spacers for Double Angle
@Hokie93, thanks for the response as well. That's a direct equation for computing the shear force, the only problem is to determine the critical buckling load. Any reference on this one how to get the Pcr (critical buckling load)?
@BAretired, thanks for the useful information.
RE: Design of connector spacers for Double Angle
(Ref. AISC E6.2)