How to construct overhang in eve of pavilion

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You guys were super helpful in another thread where I'm designing a 25x30 patio pavilion from steel.   But one of my pet peeves of metal constructed buildings is that they rarely have a decent overhang.    I've designed this pavilion for the truss to come down so there is a 18" overhang on the sides, and if I put the purlins on top of the trusses, it can extend out in the front/back 18" as well.   But when looking at designs of similar buildings, everyone puts the purlins flush/even with the trusses, instead of on top, and that makes sense.    So if I move the purlins to be flush/even with the truss, now I wont have the 18" overhangs, so I'm wondering what's the best way to build out the overhang.   In wood construction, I've see a ladder of sorts built out of 2x4 and attached to the eve.  What are common ways of doing this?  The esthetic appeal of this is important, so if there are unique ways of doing this, I'm open to suggestions.  I have multiple processes for welding, CNC Plasma, etc.. so I would be open to building custom supports etc..   I'm likely going to cut some custom corbels for the corners, so something similar might be an idea.  Here's a pic with the trusses on top.  I need to update the drawing so they are even/flush.  Thanks,Mike


Reply:IMHO, overhang is there to protect the building materials. (no one wants rotted wood)If you are building steel, or "metal", there should be nothing to protect.Build it flush like everyone else, or you are gonna pay to "reinvent the wheel",,I had a sister in law that just had to have a round room in her new house, in Richmond VA.(She had seen it in Florida)Well, the cost to construct was 6X the Florida cost. No one in Richmond knew how to do it,, so they charged accordingly.
Reply:You should have ran your rafters long or your purlins long. Really not a big deal. My steel framed house is exactly as I said, rafters run long as well as purlins ran long.

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Reply:Do a Google image search for "barge rafters"
Reply:I agree most metal building are designed without overhangs and i personally like the way buildings look with overhang much better. it really is about purlin length. I you need to extend purlins you might be better adding in the middle than splicing at the eves. If dealing with pre-engineered kits you should get the manufacturer to design the overhangs. I think this was all about economy.
Reply:You can put overhang on any of them but ideal is to run the rafters out and simply put a rake angle on it.  It should have been in the plan but if I was going to add it to this would extend the purlions, just weld a chunk on and use 2 sheet metal angles as rake, eve strut even if a guy had it and sheet.www.urkafarms.com
Reply:Bob,,, I really like that, like the simple eve roof, really solves a lot of problems.  I am a fan of practical, 2 roof planes is another highlight.www.urkafarms.com
Reply:Another reason there is no overhang on many pole buildings or steel framed buildings is that it has better resistance to wind damage.  I went with a 2 foot overhang on the front of my shop, and when there is a strong gust from the south the building really shudders and creaks.  The other 3 sides have a 1 foot overhang and the wind hitting those sides have less of an effect.I wish I had more than 2 feet on the front,  or rather a covered pavilion like you are planning. With almost daily rain or snow the past month, I could have worked on quite a number of things under a cover.Century buzzbox that I learned on 40+ years ago (was Dad's)Crappy Century 110volt mig 70 amp pigeon pooper.Lincoln Idealarc TIG-300
Reply:I have some on the side, front would have been ok but it was more work and more money too.  I work out my side door and need to improve rain gutter for the early and late work.  If there is any snow it drips for a long time.  Lots of stuff is easier outside in nice weather, I dont use side door in the winter but when its above 45 or so it goes open. Daylight is so much brighter.

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www.urkafarms.com
Reply:

Originally Posted by StandarDyne

Do a Google image search for "barge rafters"
Reply:

Originally Posted by Bob

You should have ran your rafters long or your purlins long. Really not a big deal. My steel framed house is exactly as I said, rafters run long as well as purlins ran long.