Timeline for Need help reinforcing a pergola
Current License: CC BY-SA 4.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Apr 17, 2020 at 16:38 | comment | added | Ack | The moment connection can be either location, or both. Consider a standing lamp for a moment connection at the bottom and a table for a moment connection at the top. I am concerned that the fin will be a toe stubber or tripper. | |
| Apr 17, 2020 at 16:05 | comment | added | Ziggystardog | My framer who built the pergola is suggesting adding steel brackets (an angle with a fin), 2 each at the base of the four corner columns. Would that work? or does the lateral bracing need to be at the column to roof connection? | |
| Apr 16, 2020 at 1:30 | comment | added | Ack | Yes, but it's a complected yes. Moment joints in wood just don't work very well for many reasons. Putting in a steel corner bracket will likely help, if nothing less then you are effectively taking a two bolt connection and making a four bolt connection (in a given direction) with the related benefits. Note that the bracket can be internal or external, the bolts could be pins etc. Note also that there will ALWAYS be movement, we're simply looking to reduce it below a level that is acceptable to you or even unseen by eye; it helps to think of it that way, there is no 100% | |
| Apr 16, 2020 at 1:23 | comment | added | Ziggystardog | Also, as an even more unobtrusive lateral bracing solution, I wonder if we could reinforce the existing two bolt connection between the column and beams by adding custom steel brackets or angles? I see all sorts of modern wood pergolas online that do not have knee braces or tension rods. Our framer probably could have used a different connection and we'd be fine, right? Is there any way to solve this in a minimal way? | |
| Apr 16, 2020 at 1:04 | comment | added | Ack | The footing connection is fine for it's purpose which is to hold the post in place and resist against uplift. While the base does create a bit of a moment connection (the post would likely stand up on it's own after installation) there is not really enough to consider it as part of the lateral resistance. There are some really nice looking architectural / structural rod / cable items out there and something will fit nice with your beautiful pergola and house. For example: cableartinc.com/archRodSystem_index.php | |
| Apr 16, 2020 at 0:55 | comment | added | Ziggystardog | Thank you for clarifying the terms. I will look into tension rods to increase the depth of the moment connection. The framer who built it for us, tells me he used 2 1/2" redheads drilled 4 1/2" into the concrete. I wonder if that connection is also a bit weak. The concrete was thickened at all four corners of the slab, although not under the two middle columns that we added in order to decrease the joist depth. Anyway, I do hope adding some tension rods will solve our problem. Thanks for the advice | |
| Apr 15, 2020 at 23:18 | history | answered | Ack | CC BY-SA 4.0 |