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Gusset Plate for Redundant Bracing

Gusset Plate for Redundant Bracing

Gusset Plate for Redundant Bracing

(OP)
What criteria should I consider for the design of a welded gusset plate for a bolted redundant brace +/- 12 kips.

RE: Gusset Plate for Redundant Bracing

Not enough info for us to comment.  Please explain the situation in a bit more detail.

RE: Gusset Plate for Redundant Bracing

(OP)
The horizontal redundant brace is being added at the midpoint of a braced bay (tension rods)of an existing guy-tower.  The enginner is indicating the connection for this redundant member to be designed for a member force of +/- 12K. The angle size for the redundant is  2 1/2 x 2 1/2 x 1/4 and the gusset plate thickness is to be 3/8".  

RE: Gusset Plate for Redundant Bracing

always use at least 2 bolts.

RE: Gusset Plate for Redundant Bracing

If you are sure the brace will always be in tension, then I agree with csd72...use at least 2 bolts.  If there's a chance of compression, assuming the brace is longer than a few feet, you might have a buckling problem.  Your angle can handle 12k up to about 6 or 7 feet if continuous.  If gussetted, only about 1/2 that.

RE: Gusset Plate for Redundant Bracing

(OP)
My concern is more with the gusset connection to the tower leg.  I am using a 2-bolt connection.  The engineer chose the angle size and assume he designed properly for both tension and compression.  

RE: Gusset Plate for Redundant Bracing

If your bolts are large enough, 12k can be handled by two bolts.

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