All, just revised this intro post to include a few thoughts on lessening the load on the 3"x12" Junior I-Beam
Due to our recent purchase of a Lance cabover camper for the wife's Ram 2500 flatbed truck I need a place to shelter it while making a few structural repairs and upgrades as well as store it when it's off the truck.
Since the truck mounted camper is 11'6" tall, and my shop is 30'x40' with 10' walls with two 8'x10' doors on the side, the camper/truck isn't going inside. The plan is to pore a 20'x40' slab and put a free standing, open sided shed on the side of the shop. Over the past couple years I've put together most of what's needed: 3 sticks of 3"x12"x20' Jr. I-beam, 8" pipe for the 6 support posts and new 23', 26 ga. PBR galvanized roofing tin. Still need to buy the 3"x8" cee purlins.
Plan; outside height, 13', then at the building 14' giving 12' clearance at the lowest point (required for the truck mounted camper, backhoe, loaded hay trailers etc.). The shed roof will have 1' of overhang on the low side and extend app. 2' over the shop roof. The rise will be 1' over 20'.
To reduce total roof height, I'll probably weld the purlins into the sides of the I-beam as opposed to sitting them on top. I did this on a 30'x60' hay shed a few years ago and it turned out well. No issues, just a bit more work.
I'd like to have 2' of rise but I'm concerned about the shed roof being taller than the shop roof. With the 1' in 20' rise mentioned above, the shed will be 1' above the peak of the shop roof.
I'm also considering angle bracing the 3x12 Jr. I-beam 2' from each 8" support post reducing the free span by 4'. The support columns will be centered 1' from the edge of the slab making for 18' of span and with the angle bracing, free span will be 14'. Is this a reasonable design for the Jr. I-beam?
Finally, just how much trouble am I asking for. This is in South Arkansas. Average annual snow is 3" or so with 6" or 7" every 3 or 4 years. However I've seen 12" plus. Say every 20 years or so.
RonR
Due to our recent purchase of a Lance cabover camper for the wife's Ram 2500 flatbed truck I need a place to shelter it while making a few structural repairs and upgrades as well as store it when it's off the truck.
Since the truck mounted camper is 11'6" tall, and my shop is 30'x40' with 10' walls with two 8'x10' doors on the side, the camper/truck isn't going inside. The plan is to pore a 20'x40' slab and put a free standing, open sided shed on the side of the shop. Over the past couple years I've put together most of what's needed: 3 sticks of 3"x12"x20' Jr. I-beam, 8" pipe for the 6 support posts and new 23', 26 ga. PBR galvanized roofing tin. Still need to buy the 3"x8" cee purlins.
Plan; outside height, 13', then at the building 14' giving 12' clearance at the lowest point (required for the truck mounted camper, backhoe, loaded hay trailers etc.). The shed roof will have 1' of overhang on the low side and extend app. 2' over the shop roof. The rise will be 1' over 20'.
To reduce total roof height, I'll probably weld the purlins into the sides of the I-beam as opposed to sitting them on top. I did this on a 30'x60' hay shed a few years ago and it turned out well. No issues, just a bit more work.
I'd like to have 2' of rise but I'm concerned about the shed roof being taller than the shop roof. With the 1' in 20' rise mentioned above, the shed will be 1' above the peak of the shop roof.
I'm also considering angle bracing the 3x12 Jr. I-beam 2' from each 8" support post reducing the free span by 4'. The support columns will be centered 1' from the edge of the slab making for 18' of span and with the angle bracing, free span will be 14'. Is this a reasonable design for the Jr. I-beam?
Finally, just how much trouble am I asking for. This is in South Arkansas. Average annual snow is 3" or so with 6" or 7" every 3 or 4 years. However I've seen 12" plus. Say every 20 years or so.
RonR
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