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OHD framing baseplate detail

OHD framing baseplate detail

OHD framing baseplate detail

(OP)
I often have the situation where a 2-8” channel columns frame the opening of overhead doors. Sometimes the channels have to be right at the edge of the concrete slab/wall. In this situation, the anchors have a very small edge distance and end up with highly reduced side breakout capacity.

Using Annex D, it appears that a single, larger anchor rod (usually a HILTI KWIK Bolt 3) has more capacity than 2 smaller anchors because by the time you space them out, the one anchor closest to the edge ends up reducing the capacity of the group too much.
My question is, how do you typically deal with anchoring steel channels close to the concrete edge? Is there an easy way to tackle this that I’m not aware of?

I’ve attached a section for clarification.

RE: OHD framing baseplate detail

I usually do two anchors but in a line and check them for the eccentrically applied load. Located in the middle of the wall/upstand to maximize breakout capacity for both pressure and suction.

RE: OHD framing baseplate detail

(OP)
Thanks jayrod12.

Anyone else?

RE: OHD framing baseplate detail

2 anchors in a line as jayrod says.

Otherwise what resists the channel's proclivity to twist?

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