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A small low-level boardwalk

Adam_W
Valued Contributor

A small low-level boardwalk

IMG_0675.jpegAs low decks seem to be a constant subject of interest I thought this was worth sharing as a slightly different situation.


We needed an elevated entry to a new door into our house from the driveway. Being a very level block and having high rainfall it had to provide a dry entry. There is a very small amount of slope in the area so the gravel ensures water can easily flow.


I wanted the deck to be at the same level as where the first step-tread should be on the stringers. That meant I needed to install the first step-tread upside down (underneath).


Due to its position beside the drive in an area that is used for 3-point turns I didn't want to put the edge of the deck right on the edge of the drive as I knew it would be reversed into hence the setback.


Not finished yet as I need some merbau treads & they are impossible to find at the moment and once I have them in I'll dress the side to conceal the stringers & I'll fill the riser gaps too.


I just thought the stages of ensuring clearance may be of interest.

External frame and posts in.External frame and posts in.Cleared away soil beneath frame.Cleared away soil beneath frame.Lay drainage mat & add gravel BEFORE finishing frame. Much easier that way. If you don't add drainage mat then gravel will, over time, sink into soil.Lay drainage mat & add gravel BEFORE finishing frame. Much easier that way. If you don't add drainage mat then gravel will, over time, sink into soil.Framing finished. For the main supports I used stirrups in concrete. For the secondary I used Tuff Blocks as the gravel gave a perfect base.Framing finished. For the main supports I used stirrups in concrete. For the secondary I used Tuff Blocks as the gravel gave a perfect base.Drainage gravel in.Drainage gravel in.Deck laid. 140mm boards. This is same size as bearers so can also be used to conceal them on exposed faces. Another layer of drainage mat laid onto drainage gravel around edges and then dressed with river pebbles.Deck laid. 140mm boards. This is same size as bearers so can also be used to conceal them on exposed faces. Another layer of drainage mat laid onto drainage gravel around edges and then dressed with river pebbles.

MitchellMc
Bunnings Team Member
Bunnings Team Member

Re: A small low-deck boardwalk...

Many thanks for sharing this process with us @Adam_W. It's beneficial in visualising how the soil should be prepared and adequate clearance established on a low-level deck. 

 

The river gravel looks fantastic and is a nice finishing touch. Make sure to update us once those Merbau step treads are in.

 

Great work.

 

Mitchell

 

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redracer01
Trusted Contributor

Re: A small low-level boardwalk

Hello @Adam_W 

 

It's always a treat to see your handy work! For me it's always a learning experience as I did not imagine you could build a small low level deck in this manner. Looking forward to the next build and learning more! 

 

Cheers, 

Red


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Adam_W
Valued Contributor

Re: A small low-level boardwalk

Thanks @redracer01  😎

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th-DIYER
Junior Contributor

Re: A small low-level boardwalk

Hey @Adam_W @can you show a photo of what stirrups you used and how they are concreted? Many thanks 

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Adam_W
Valued Contributor

Re: A small low-level boardwalk

Hi @th-DIYER I didn't get any close-ups of them.
I had to use these, centre-fix stirrups, as for some inexplicable reason my local Bunnings doesn't stock half-stirrups.
Very rudimentary diagram below of how I fixed them in.

stirrups.jpg

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shauny
Junior Contributor

Re: A small low-level boardwalk

@Adam_W  Just a quick question about those stirrups and the footings you put in. How deep and wide did you go with the concrete, anow how much clearance do you have to your timber?

I am about to do a deck partially over a slab, but part is on the ground and I am trying to work out how to do my frame up. Will start my own thread shortly, but just looking at your pic there, I might actually be ok with running a bearer with a bracket like that cemented in, and just dig away a little earth to give enough clearance to my timber.

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Adam_W
Valued Contributor

Re: A small low-level boardwalk

Hi @shauny ,
the holes were only around 3 to 400mm wide and around 400mm deep. Our soil is quite stable so don't need to go much larger. Each took about 1.5 bags of quickset.
As it's a level area the concrete really just becomes a stabilising dead-weight. It's not a structural footing as it's not taking a major load or on a slope etc.

And a note on concrete... I feel confident using these smaller footings as I've switched to using a high MPa concrete mix as it doesn't crack or crumble like the lower grade stuff.
The lowest point of clearance above the finished gravel was about 50mm and there was around 40mm or so of gravel above the soil.

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MitchellMc
Bunnings Team Member
Bunnings Team Member

Re: A small low-level boardwalk

Welcome to the Bunnings Workshop community @shauny. It's a pleasure to have you join us and fantastic to hear about your upcoming decking project.

 

I'm pleased to see @Adam_W has already assisted with your question about his project.

 

We'll be looking forward to you starting a discussion and sharing your decking project with us. Be sure to check out our Top 10 most popular deck projects for some inspiration.

 

Please let us know anytime you need assistance with your projects around the home or garden, as our knowledgeable members are always willing to lend a hand.

 

Mitchell

 

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