See attached image... (not all measurements are correct, but the principle is visible)
I'm in the process of building an orangery/greenhouse and the foundation is an existing concrete slab, with about 50 cm of leca built up as low "walls." Previously, there was a wooden frame on this, but I intend to build pillars in the corners and at the doors, partly for aesthetic reasons, but also to get the right measurements with the windows we have and plan to install. The height will be a maximum of about 150 cm for the pillars, and on top of the pillars will be a wooden beam that the rafters rest on.
The question, however, is which material to choose for the pillars... I suspect brick, 2 in width, so that each pillar is about 25 x 25 cm, but when I look at the price, leca seems more appealing! However, leca seems a bit too "fragile" and unstable? What do you think? Or is there a third solution?
It will be plastered on the outside later, so aesthetics don't matter!
I have no experience in calculating brick columns in load-bearing structures, but I built a similar solution in my house, where I solved it by having a steel profile (VKR 60x60x5mm) in the middle of the brick column. The brick provides an aesthetically pleasing appearance, the steel column bears all the load, and I can sleep well at night.
Yes, I was considering putting in a beam, but it will be tricky to fit it into the existing low wall (but if I have to, I have to...).
Regardless of brick or leca, I was planning to have one or two rebar in the center of the pillar. So I definitely think brick will hold, but the question is if I can make it easier with leca.
I don't know if I've really understood how you've thought about the construction in leca.
Is leca available in the size 25x25cm? And how would you then plan to get the reinforcement bars in the center, drill straight through the lecablocks?
I also think that brick will hold if you turn every other course 90º
But I am a mechanical engineer and prefer to build load-bearing parts with steel (which I can calculate), as mentioned.
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