Sustainability seating bench

[Mattias_Jo1]

Hello
Built a bench with 45-195. It is 180cm long with steel square profile legs that will be positioned about 20cm in on each side. How concerned should one be about deflection if a 100kg person sits in the middle?

Best regards, Mattias

 

[Rickard.]

Here is a great tool for this if you want to get an idea, otherwise the best way is to experiment.

https://woodbin.com/calcs/sagulator/

 

[Mattias_Jo1]

Here is a good tool for this if you want to get an idea, otherwise the best is to test it out.

[link]

Thanks for this. It feels like there might not be a problem.

 

[justusandersson]

Provided that 100 kg is evenly distributed on the two boards and that the wood is C24 class, the deflection is 1.7 mm.

 

[Mattias_Jo1]

Assuming that 100 kg is evenly distributed on the two boards and that the timber is of C24 class, the deflection will be 1.7 mm.

Ok..yeah that's not much.