DIY Chatroom Home Improvement Forum

DIY Chatroom Home Improvement Forum (http://www.diychatroom.com/)
-   Building & Construction (http://www.diychatroom.com/f19/)
-   -   Deck beam splice question (http://www.diychatroom.com/f19/deck-beam-splice-question-49348/)

drtbk4ever 07-21-2009 04:08 PM

Deck beam splice question
 
1 Attachment(s)
Hey Guys,

Rebuilding my deck and have a question about my deck beam. The beam is 17 feet long and will be a double 2X10 pressure treated. Three posts with the two outside posts in about 12 to 18 inches from the end resulting in the beam being cantilevered. See below.

I cannot find any pressure treated lumber longer than 16 ft. For that matter, I can't find any dimensional lumber around town longer than 16 feet. So that means I am going to have to splice my beam. The only place to do that is on the middle post so both splices will be together sitting on that middle post. I'd like some expert comments onthat.

Is this OK or should I look for 17 foot manufactured beam. Glue lam or whatever they are called. Remember this is outside.

Scuba_Dave 07-21-2009 04:59 PM

So you are using the existing posts w/new beams?
What were the old beams?

drtbk4ever 07-21-2009 06:28 PM

Quote:

Originally Posted by Scuba_Dave (Post 305035)
So you are using the existing posts w/new beams?
What were the old beams?

Yes, I am using the old piers, new posts on the piers. And I can't remember if the beam was one piece or if it was built up. Doh...

Gary in WA 07-21-2009 08:24 PM

1. How high off the ground?

2. What is the joist span to the next bearing?

3. What size, species of floor joists?

4. What size posts?

5. Is it attached to the house?

The tension, compression on the two piece beam needs to be addressed for a Simpson post cap, possibly by an Engineer. Give us the other info. first, please. Be safe, G

drtbk4ever 07-21-2009 08:44 PM

I have answered the questions below in red.

Quote:

Originally Posted by GBAR in WA (Post 305141)
1. How high off the ground?Bottom of beam is 13 inches off ground

2. What is the joist span to the next bearing?10 feet, which is to code here

3. What size, species of floor joists?2X8 pressure treated spruce, again is code here

4. What size posts?4X4 posts.

5. Is it attached to the house?Yes

The tension, compression on the two piece beam needs to be addressed for a Simpson post cap, possibly by an Engineer. Give us the other info. first, please. Be safe, G


Gary in WA 07-22-2009 01:29 PM

I'm not an engineer. I would imagine they would recommend two post caps like this: On each side- AC: http://www.strongtie.com/products/co...E-LPCZ-LCE.asp With a flat strap as a MST27 on each side: http://www.strongtie.com/products/co...S-HST-LSTA.asp Be safe, G

Clutchcargo 07-22-2009 01:54 PM

Can't you special order a 20' 4x8? It will probably cost $100 but it may be worth it if you don't have to think about the splice.

ARI001 07-22-2009 02:28 PM

Check with 84 lumber they may have 20' in stock. I remember seeing some 20' 2x10's and 2x12's in the lumber area at one about a year ago. May have been a special order for someone though.

drtbk4ever 07-22-2009 07:00 PM

I checked with the "specialty" lumber yards around here. The owner of one store said he would have order a lift of them.

We don't have 84 Lumber stores here in Canada. I will make a few phone calls to a few other lumber places.


GBAR, I already picked up 6 of those AC Strongtie post caps. I'll look into the strapping if I can't find a 20 footer anywhere.


All times are GMT -5. The time now is 02:11 PM.


Copyright 2003-2014 Escalate Media LP. All Rights Reserved