How to build a wooden walkway 1.2m wide?

[Rick3]

Can I get away with two parallel 90 x 45 bearers1.2m apart(the width of the walkway) supported by short posts every meter along the length. Deck will be 90mm wide Merbau deck boards. Walkway will be only slightly above grade.

 

[Rick3]

I figured out that I can’t span a decking board 1m unsupported so I will have to run another bearer and line of posts down the middle. 

[JacobZ]

Hi @Rick3,

A warm welcome to the Bunnings Workshop community and thank you for your question.

Merbau decking is designed to be supported by joists spaced 450mm apart. With your design, even with the additional bearer running up the centre, the decking is spanning more than it's supposed to.

Have a read through How to understand deck span tables for a bit more information.

If you can provide some details on the overall length of the pathway, I am happy to help with a redesign that is in line with the recommended spans.

Let me know what you think.

Jacob