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FML. Why do you spoil a very very attractive design with a complete disregard for basic mechanics?

Ignorant designers are no good to anybody.

just as food for thought, review Eulers work in buckling.

I’ll assume your using the strongest soft wood (C24 – 24N/mm^2), the pillars are 1/2″ (12.5mm dia), and they look about 300mm (1′) high.

so P(e) = Pi^2 x E x I(circle) /Le^2

so let E(mean) (youngs modlus) C24 = 7200 N/mm2
let Ixx = Iyy (circular) = pi x d^4/64 = 3.1415 x 6.25^4/64 = 74.9 mm^4

you have no restraint at the bottom, and all the restraint at the top, so the effective length is going to be 2 x L = 600mm.

therefore, the critical buckling load is going to be:

(3.1415^2 x 7200 x 74.9) / ( 600^2) = 5322480/360000 = 14.78 N

divide this by the gravitational constant “g” (9.81m/s^2) give us = 1.5 kg.

so that skinny little post will START to deflect and buckle at 1.5kg. you have 20 posts. 30kg.

you’ll also need to account for the increase in load under your ass when you sit down.

this requires more work to get the proportions/lines/thickness right. but have a play with those numbers and look again.

Looks cool but it looks like it would fall over also it doesn’t look too comfortable without some cushion right? Or maybe its just me?

I want to see sitting. But this is a hard material?