Two story deck with splice post only.. 1

[scpanchal]

Folks,
I have started building two story deck with dimension

total - 36x10'8"
level 1(18" below level 2) 19x10' 8"
level 2 17'x10'8"

Following are limitations.

1) I have a grading way from home there is difference of 4-5 feet between highest and lowest point of deck.

2) I have created 12 concrete columns(12" diameter) comes to first floor of deck, beams can literally be rested on this columns.

3) I have used double 2x12 beams and 2x8 for joist. span between columns are no more than 8 feet depth or width either way.

4) Beams are going to rest on concrete column and I need to connect post for second floor. How do I do it?

 

[MikeHalloran]

Ask the engineer who sealed the plans.



Mike Halloran
Pembroke Pines, FL, USA

 

[scpanchal]

Thanks for valuable suggestion. Any technical suggestion/solution? I would have done if possible.

 

[Retrograde]

One option would be to use a steel bracket fixed to the top of the column. The beam passes through the "U" shaped section.

 

[pete600]

scpanchal,

How do you plan managing the horizontal forces (ie. wind, seismic, nominal loads)?

"God grant me the serenity, to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference" -Reinhold Niebuhr

 

[scpanchal]

For the horizontal forces
1) diagonal bracing to beams
2) bracing the post to beams
Do you think this would enough? If not,
I could put the ledger board for second floor.

 

[Ron]

Please provide a sketch of your intent.

 

[JStructsteel]

What Mikes response said, what does the plans show? Hopefully its not wood right on concrete.

 

[scpanchal]

This is how the plan says...

 

[Once20036]

Personally, I would attach the post to the top of the concrete (not directly on the concrete as others have commented) and find a way to attach the beams into the side of the post.
It seems as though there's no reason that the concrete pier needs to be at this elevation - it will be much easier to build if you hold the concrete down a foot and set the correct elevation by cutting you posts, rather than hoping for a really precise concrete install.

 

[pete600]

Is this a free standing structure? Or is it attached to another structure?

What do the columns bear on? Is the a pad footing?

If it is freestanding, then base will likely need to support a lateral load. Assuming that there is not a footing, 3' to 4' embedment into the soil is probably not enough to make the columns stable. This is assuming the top of the columns are pinned. Looks like a house of cards to me, unless you are attaching the structure to something else to manage the lateral loads or there is some type of foundation not shown on the sketch.

"God grant me the serenity, to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference" -Reinhold Niebuhr

 

[scpanchal]

So in that case, I can do one thing.

1) Connect the post to concrete with :

http://diy.stackexchange.com/questions/44028/how-wide-does-a-6x6-concrete-post-footing-needs-to-be

on the one of the hole of this post base I connect following on both side.

http://www.essentialhardware.com/si...m_medium=cpc&gclid=CP-fv8iz0cgCFVcSHwodkz4EAQ

Would this hold the post and beam together on column?

Only problem with this would be one post in middle. where two beams from two side comes together with post. How do I do that?

 

[scpanchal]

Hi Pete600,
Lateral load:

If I connect the entire structure with ledger board should that be enough to handle lateral load?

House external wall is on both side of this structure. I can connect this structure with ledger board to house on back and on one side as well.

 

[scpanchal]

 

[pete600]

Assuming that you are attached to a building on at least one side (2 is better) and the floor diaphragm is nailed well, then it should be okay.

Regarding the connection of the middle post. You maybe able to find one piece to span all 3 columns OR you will need to splice it.
Using 1 piece is better and, I believe, 18' to 20' is available in most regions.

"God grant me the serenity, to accept the things I cannot change, the courage to change the things I can, and the wisdom to know the difference" -Reinhold Niebuhr

 

[jayrod12]

you should be able to easily face mount beams to two sides of columns provided the beams are narrower than the column face. Simpson strong-tie has a vast assortment of concealed flange beam hangers that would suit such a construction. If the beam is wider than the column (unlikely if you have a 6x6) then you may have to go to some sort of custom steel beam hanger that bolts to the column and provides the beam seats required.

 

[scpanchal]

Hi Everyone, THANK you so much for the help and precious input.

Hi Pete600,
THank you specially. Just one last thing, Does the fitting works fine with Anchor and Side braces in above link?

 

[JStructsteel]

How will you attach the ledger board to the house, and get it waterproofed correctly?

Just to be curious, how are you getting a building permit for this?

 

[scpanchal]

Hi Jayrod12,
1) I will cut the sliding where I need to put ledger.
2) Put vinyl thin sheet tuck up side into existing sliding.
3) Put weather proof sealant top of the board.
4) put Vinyl Window and door cap on top
5) Once leg bolts are in place put sealant around them as well.

Thanks,

 

[scpanchal]

Yes. I have got the building permit for this.