How to Install Deck Joists | Trex Academy
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- čas přidán 29. 06. 2024
- Proper installation and fastening of deck joists ensures the structural integrity of your new deck. Learn how to install joists for composite decking with the Trex Academy's step-by-step video instructions.
For more information on deck joists and installation, visit: cur.lt/kg3m2wjin and start building the deck of your dreams.
Key moments in this video:
00:00 Intro
0:18 Crowning of Joists
1:11 Installing the Rim Joist
3:10 Installing First Beam Block
4:45 Installing Joist Hangers
8:46 Joist to Blocking Connection
10:27 Joist to Beam Connection
10:42 Installing Beam Blocking
12:35 Breaker Board Framing
13:37 Planning and Cutting the Cantilever
18:38 Front Rim Joist Install
21:01 Checking for Flatness - Jak na to + styl
Glad to see you treating all the cut ends. So many people skip that step and try to blame premature failure/rot on something else.
Seems like there are a lot of opinions here. I find these videos to be extremely helpful and thorough. Thank you so much for putting these together!
When framing for a picture frame border with facia overhang, need to subtract one of the .25" gaps, subtract 1.25" for the facia/overhang and subtract 1.5" for the rim joist when cutting the end joists.
It would be nice if you could include list of hardware like fasteners etc used in the description in all your videos. That would really help DIYers. Thanks
There is not a list but as I watched each video I wrote down what connectors were being used as well as the fasteners....
Great videos... I can't count the number of times I have watched each one... The only thing that I did not see in the video was how the inner joist for the breaker board are connected or attached to the ledger board... I improvised using H2.5AZ hurricane ties at the beams and overlapped standard LUS28Z joist hangers with a wider joist hanger that encased both joist... May not be as pretty but I was in a pinch and had to get the connected... As a DIYer I appreciate all the detailed information..... Well done Devin
This is very thorough. It should have more views. Especially with calling out the hardware. Nice job. I'm impressed.
Love your video. Very helpful
Good info. IMO I’d also recommend grading your joists when checking crowns. Measure and group the joists by size and install them from shorter to taller to help avoid a wavy deck.
That's high tech
"Roughly a quarter" gap is right. I did a 14 foot deck, calculated 29 boards, did 5 3/4 as the width and ended up with a 2" gap at the house because the actual gap created with the universal clips was 1/16th less than that, compounded by 29 boards , ended up way off.
Dudes never watched Larry Haugn before.
Yea I’m not sure Devon learned any of Larry’s work in his three years Theater Acting or Jazz Tap
I do lol
Since you are blocking as you install each joist, isn’t there a problem with the joists running outside of 90 degrees from the ledger? (Due to differences in blocking length - no matter how careful you cut them).
Did you account for the overhang and facia in your calculation when you figured how many boards?
How do you handle the Trex RainScape sheeting where blocking interferes with the run in each bay?
Very well done videos.
Thank you - we appreciate you taking the time to watch!
Yeah i would use a concealed joist hanger for that rim joist and 2.5 inch screws in the ledger.
by using the breaker board how would you go about using the trex rain escape so the water doesn't seep thru the small gap at the breaker board?
I see you are using .220 x 8" Simpson structural screws to attach the rim board. What size drill bit are you using for pre-drilling?
1/8” x 12” long.
Another way to ensure you don't have high joists is to grade them by size (where they land on the beam).
I'd check with the AHJ and make sure that the blocking being described here isn't to be installed at mid-span. I know it's that way in my county.
When you cut the length of the joists shouldn’t you have subtracted the width of your facia and the overhang of the first deck board?
Thanks for the video. Shouldn't the front rim joist be installed bark side out?
Hi Steve. Thank you so much for reaching out to Trex with your question. The lumber used during this installation does not have any bark/wane present. The bark/wane on a board does not affect the strength of lumber. Please let us know if you have any additional questions or concerns. Someone from our Customer Care Team will be more than happy to assist. Kind Regards. -Trex Customer Care 800-289-8739 | customercare@trex.com
You should really have the long side of the shoe against the square, so that you'll have a straighter cut. You don't want to cut so that she long side of the shoe is hanging over the part of the stock that is being cut off.
There are one less space than deck boards, so the length of the joists would be one space shorter unless you include a space the first deck board away from the house.
I caught that as well.
Never install blocking over the beam. It may not dry properly
Good Morning, I'm new to your channel and must say, Great Videos! Quick question, what size drill bit are you using to pre drill the holes to accommodate the 8 inch timber screw?
5/32 from deck post video
So….nice video series, but you are obviously in an area that requires hurricane mitigation. Spent all this time and additional cost for the hangers and screws and bolts yet you didn’t attach the posts lower foundations in the ground🤷 in a wind event the only thing keeping the deck, somewhat, from lifting up are the ledger boards. As we all know that is a temporary thing, as the pressure upwards will lift that beautiful deck and the structural ledger of the house to Kansas. Did I miss a step where you secured the posts to the footing in the previous video?
Are you using standard 16 inch on center for the joist spacing or is 12 inch on center recommended to reduce any warping?
16 inch on center is what Trex recommends for deck board installation for deck surfaces. 12 inch on center for stairs. If you are doing diagonal decking or special shapes you would need to adjust to 12 inch maximum.
Our spanning for joists and stringers will vary on angle of boards and the line of board being used. We have a chart in our install guides on pages 17 and 24 with our recommend spans. Trex Customer Care 1-800-289-8739
What is the measurement of the blocking?
Materials list? Wood sealer info and fasteners, screws etc?
Hi, Thank you for your feedback. Materials required are going to vary with projects and local codes. Please reach out to us at 1-800-289-8739 if you have any further questions.
Trex Customer Care
What is the spacing for the joists you use for the breaker board? Thanks.
Hello Paul, thank you for reaching out. The maximum joist spacing for our 1x6 boards would be 16" on center. You could have them closer at 12" for example, just not past 16" on center. Kindly, - Trex Customer Care Team
I know municipalities codes vary. But. Does the maximum cantilever increase when using 10”or 12” boards?
Yes it does, and the codes usually give you a table to read from based on both joist span/size and beam span/size combos. In any case, the max overhang must not exceed the joist span divided by 4!
I searched everywhere and finally found one 5/32" x 8" drill bit for the 8" .220 Simpson Strong Tie Timber screw to attach the inner to rim joist. However, it snapped in half with my first test. And another test also split the 2x8 without a pilot hole. How is everyone successfully drilling a pilot hole for the 8" .220 Timber Screw?
You don't need to drill that deep. Standard drill length should suffice. Use "peck drilling" for deep holes.
What drill bit size you use to predrill for 8 in timber screws ?
5/32" drill bit is for 8" timber screws
A similar question to what I am asking here was made a couple months ago, but I do not see an answer. For the four joists that are spaced close together below the breaker board, I see what looks like an L70Z bracket supporting the outer 2 joists at the ledger board, but it is not clear what is supporting the inner 2 joists at the ledger board. Can you please elaborate on that?
Same question. I swapped out the LU26's I used on the rest of my joists with LUC26Z's for the breaker boards that are spaced closed together. The concealed screw placement seems to do the trick, but the inside connections aren't reachable to place screws to the actual joist. Suggestions are appreciated.
Hi Andrew, thank you for reaching out! L70Z’s were used in this application. We started by attaching the L70z to the joist and then attaching the joist to the ledger. Then cut the next joist slightly shorter to clear the screws on the L70z of the first joist. This is just an 1/8” shorter. Attach the L70z to the joist. Place the joist in its proper position against the ledger and next to the first joist. Then attach the joist to the ledger. With the L70z’s facing away from each other and starting from the inside joist is how we accomplished this. If you have any additional questions, please let us know. 1-800-289-8739. Thank you, Trex Customer Care Team
@@TheTrexCo Sorry, this is not clear at all. If the two LZ0Z connectors are facing away from each other why are they not visible in the video that shows nothing there on the inside? Are you saying that they both are on the same side with the inside joist installed first then the outside joist cut ⅛" shorter to clear the first one?
How are you attaching the breaker board joists to the ledger board. Does not look like there is enough space to use the normal joist hanger.
I have the same question. I also wonder how you are spacing the two joists. They clamped together, but with a space between them.
@@jimvee4528 Simpson makes a joist hanger that is double the thickness of a 2x8, so you can hang a doubled joist.
@@markledyard Thanks Mark. I considered that, but it wasn't quite what I wanted.
@@jimvee4528 That's been bothering a few people.
The lag bolts are preventing the double joist from being tight...that is a problem. The gap between that divider will get big and it will be flimsy.
Hi Deeeps, This is a possibility. We recommend laying out the ledger board first with all joists and blocking elements. Then the lag bolts or engineered fasteners can be installed in between the joists in the open areas and keep them within proper specifications. If you have any additional questions, please let us know. Thank you, Trex Customer Care Team
If you space your joists 12 inches on center, and can't fit your circular saw between the joists to cut the ends, is there another alternative?
21:06 Hand saw or use a sawsall or use a saber saw
Today, I was trying to install the front rim board to my joists, but most of the joists sit too high. Some joists are a half an inch higher than the rim board. This is ridiculously too high to be planing them down. What do I do and why did this happen? These joists vary between 9-1/4 - 9-1/2 inches in width. I was very unhappy with the quality of these pressure treated boards.
Hello Henry, when installing Trex, you want the joist to be as level as the Trex forms to the substructure. We would recommend planing the high part of the joist down until it's level across the top. Thank you, -Trex Customer Care
@@TheTrexCo Yes, thank you for answering. I knew I had to plane down any joist high spots, but I was not expecting so many joists with high spots. It was ridiculous. Those 2x10`s were horrible. Junk. They were either cupped, bowed, or cracked. And the width variations were all over the place. I made about 4 trips to Home Depot to exchange the lumber. And I did check for the best pieces, but still I had to fight with the boards. I will never buy any structural lumber from Home Depot again. Anyway, I got all the joists finished now.
Hi can I use western red cedar 6 by 6 post
Hi Mike, We would recommend reaching out to your local code official or building inspector, as this can vary according to local code. Please let us know if you have further questions. You can reach us at 1-800-289-8739 Trex Customer Care.
You should size the joists first because they are not the same width and will cause waves in deck as like the crown
When you say size the joists, how? Run them through a table saw?
Concerning the breaker boards… couldn’t you have treated those like a beam, lagged then together & only used hurricane ties on one side?
Interesting. That caught my intention as well. He did not show how he worked the joist hangers on these breaker board joists. However, looking closely at the video it looks like he used a corner bracket only on the two outside joists and nothing could be seen on the inside joists. I would have liked to see what he did there. I understand his thought on the gap but personally, I think I would use double joist hangers and screw the two joists on each side together as you suggest.
@@StanHallett I think you can see it at @ 13:34, he's connected an H2.5AZ to each board. The 1/2" gap between the boards has enough clearance for the bolt heads, so that third joist has the hardware mounted in the small gap.
Where's Lindsey? I can't install a deck without Lindsey.
Don't get me wrong, Devin is great, but his natural talent tells me he should be a famous baker.
What BS Code Approved is for decks! That home the deck is fastened to is no way constructed nearly as secure as that deck! The house will be long gone while the deck is still standing if you follow all those code requirements!
Hurricane ties used on the blocking are totally useless! THINK ABOUT IT??
Hi Jack. Thank you so much for reaching out to Trex with your inquiry. Would you mind providing us with the time slot that hurricane ties were used during the installation? We look forward to hearing back from you. Kind Regards. -Trex Customer Care
@@TheTrexCo My apology! Your question forced me to review the video and on doing so I confess I must have misunderstood something that was said. I've been working 4 trades for over 60 years and at 80 I'm starting to lose it. "Live long and prosper"
Hi Jack. Thank you for taking the time to reach back out. No worries at all. I just wanted to make sure I was able to answer your questions and address your concerns appropriately. In the future if you have any questions, please let us know. Someone from our Customer Care Team will be more than happy to assist. Kind Regards. -Trex Customer Care 1.800.289.8739 | customercare@trex.com
@@TheTrexCo 2.00
They are not attached to the blocking but are attached with 1½" connector screws to the beam and the joists. There are no holes provided to attach them to the blocking