Beam / column framing details for an elevated deck with a pergola on top
dinomof
| Posted in General Discussion on
I am building an elevated deck with a pergola, and the columns will support both the deck and the pergola. I am having a really hard time figuring out how to detail the connection of the 3-2×12 beam to the 6×6 glulam column. I understand the best way to support the beam is directly on top of the post by notching the post, but I don’t want to weaken the columns as the pergola is large (10’x20′). I’ve had the sizes/spans reviewed by an engineer, but he doesn’t do a lot of deck detailing. Which is better, supporting the beams with bolts or notching the column? Neither seem ideal. Are there solutions or suggestions as to how to do this affectively?
Replies
Neither one.
bolt a shorter 6 x 6 to the long one, and set the beam on it. (or nail up three 2 x 6 side to side) Use a couple thru bolts to secure the beam to the long glulam.
The sketch shows doubled columns at the transition to the lower deck as well.
3 ea 2x 12 seems pretty hefty. how many of these are you putting in? Have you put together a birds-eye view of the framing?
I did consider something like that, but I’m not sure I like the aesthetics.
I do have engineered plan, I just didn’t upload it. This was just to illustrate the pergola over the deck. The doubled columns have been changed to one column.
I checked the design against the couple load charts on this website, and the outer beam is picking up a 10’ span so I think 3-2x12 is probably necessary.
Again the main question is the best way to attach beams to columns when you can’t put them on top of them. And thank you BTW
“[Deleted]”
Where I live, attaching beams to columns with bolts is not to code.
That said, you don't have to fully notch the post to 1 1/2 inches. A small notch of perhaps 1/2 inch might suffice.--and then through bolt. The beams should fit tightly within the notch, though. Speak to your building inspector.
https://www.strongtie.com/essentials_outdooraccents/aphh_hanger/p/aphh
If you want to keep the visual, you can consider an engineered joint. something like the above. make sure to double check the capacities. might want to run it past your engineer.
I wasn't aware of these, that seems like a great solution. THANK YOU!
Make sure you get them specified to hold a beam on a post.
might be able to contact strongtie for some help.