Horizontal slatted fence, 28x45 or 28x70?

[hampus tyresgård]

Brainstorming a bit on horizontal slat fencing.
Thinking about approx. 80-100 high, cc180 with 70x70 posts.
But, the slats. 28x45 or 28x70? Thinking about approx. 8 pcs of 28x45 in height or approx. 6 pcs of 28x70?
Has anyone done either of these? Pictures?
Which holds up best in the long run?

 

[KJD]

have done it with 28x45, because 180 goes evenly with 360 and 540, but it sags a little and needs extra support halfway between the posts, adjusted to 170 in some places and there it's sufficiently straight without support after two years.

 

[hampus tyresgård]

Hmm

have done it with 28x45, for 180 goes evenly with 360 and 540, but hangs a little, and needs extra support halfway between the posts, adjusted to 170 in one place and there straight enough without support after two years.

hmm yeah, that's what I'm thinking you might avoid with 28x70 or what do you think?😅

 

[KJD]

Hmm

hmm yes, I think that might be avoided with 28x70 or what do you think?😅

probably with something as thick as 70mm - but I haven't tested it . walk around and check a bit and measure, or take photos with a reference in the picture of what works.