Extending an existing decking

[maxit]

Last year I built a L shaped decking, 20 feet has a width of 10ft and other 10ft is 13 feet wide.

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• maxit
• 20 Apr 2008
• 1

My garden's level is 7ft lower than the decking.

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• maxit
• 20 Apr 2008
• 1

.
I want to extend the narrow part to make the whole deck 13ft wide. the garden end of the Beams are sitting(fixed) on the wall made of conrete blocks.

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• maxit
• 20 Apr 2008
• 1

My question is can I rest the new beam on brackets made of 4"x2" which would be bolted to the wall in 3ft intervals in order to support the joists which have to be extended by at least 3ft?

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• maxit
• 20 Apr 2008
• 1

 

[WabbitPoo]

Due to the height above ground your local BCO should be involved, so why not ask him how he'd like to see it?

 

[maxit]

thanks for the reply. I just came back from visiting a building officer, apparently they don't cover decking.

 

[Thermo]

if im reading this right your going to extends the decking out into mid air from where it is at the moment? are you looking to do this without vertical posts to support it at the edge?

 

[maxit]

I was thinking of using 4 brackets (horizontal par3' 6" and the perpendicular part 5' fixed to the wall and then use a timber to connect the ends by aid of steel plates). One end of the beam will rest on the wall and the other end on one of the above brackets. I can use a post to increase the support on the end bracket. Then I will extend the joists to sit on the beam. Do you think it will work?

 

[Thermo]

can you do a sketch? to be honest wether i think it will work is not the point, it needs to, so it might be best to get an engineer to look at it

 

[maxit]

Thanks for your response Thermo. I will draw a diagram and scan it in.

 

[Deluks]

Sounds like a right pavlova, compared to just getting some 4x4 posts concreted in down below, then braced at all angles.

 

[maxit]

Here is the diagram which I hope will help with visulisation.

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• maxit
• 22 Apr 2008
• 1

 

[megawatt]

The best advice you've been given thus far is to get an engineer to take a look.

Due to the height of the decking surface and the fact that you are not proposing to use posts in the more usual way you need someone to do loading calculations for you based on your proposed solution.

This will depend on many factors ...

1. The max expected load on the overhanging area.
2. The condition of the wall.
3. Appropriateness of fixings.
4. Spec of brackets.

Etc etc.

Don't try and shortcut the planning with this or you may end up seriously regretting it

MW

 

[Deluks]

Wouldn't catch me on it

Not with a full pint in my hand anyway