Attaching a lean to on a engineered building

[carguyjosh01]

I've been searching for awhile for info on how to attach 6 or 8 inch c purlins to the side of my building for a 12' wide by 30' long lean to. Anyone have any experience on this? I was thinking of maybe welding a tab of some sort to the I beam. I am also curious if one could attach the purlins directly to the eave strut back to back. Attached are the plans for the building as it currently sits. I am looking to make the roof line level and change the pitch to 1:12 from the 4:12 existing pitch.

 

[PugetDude]

I've been searching for awhile for info on how to attach 6 or 8 inch c purlins to the side of my building for a 12' wide by 30' long lean to. Anyone have any experience on this? I was thinking of maybe welding a tab of some sort to the I beam. I am also curious if one could attach the purlins directly to the eave strut back to back. Attached are the plans for the building as it currently sits. I am looking to make the roof line level and change the pitch to 1:12 from the 4:12 existing pitch.

Who designed/sold/erected the building? I'd start there.

 

[carguyjosh01]

Its a Mueller building

 

[readhead]

The girts are non structural and only there to hold up the cover. When I do additions like this I treat it as a separate building with footings and columns next to the building as well as out at the new outside edge. The original building was designed to hold it's self up and that is all.

 

[carguyjosh01]

Thanks for the reply readhead, I knew that was an option, I was hoping to do away with the support posts by the building, so I would have less things to back a trailer into, not to mention less cost.

 

[readhead]

For what you are talking about the columns can probably be 5x5 tube steel so there wouldn't be much in the way.

 

[carguyjosh01]

Heard back from Mueller. They said it would need to be free standing. Seems odd to me that with that large of a beam you cant hang something off the back side of it.

 

[Farmall450]

Heard back from Mueller. They said it would need to be free standing. Seems odd to me that with that large of a beam you cant hang something off the back side of it.

Not designed to have another building and it's snow/wind load(s) pushing onto the side of it. They're not going to re-run it through their engineering dept. with various sized lean tos for you.

 

[readhead]

Sounds strange I know but without going into all the reactions involved, that column is designed for only one job. If the building was designed for the lean to from the beginning it would look different. I’ve done a lot of lean to additions on steel hay barns and it is always the same way. I usually use a straight column next to the existing wall to save space for stacking.

 

[carguyjosh01]

Thanks for the help guys.