Hello.
I am constructing an extension and will have a gable roof with a glulam beam at the ridge. The beam is supported by two supports in the form of glulam columns with dimensions 140x135mm.
The foundation wall is built up with leca on a concrete footing.
Where the glulam columns meet the "floor," how is it usually done there? Do you place them on the sill (45x170) or on top of the standing floor joists? (if I place 3 side by side, 3x45mm = 135mm) however, that would require 4 "extra" floor joists each measuring 7m.
Could it be a good idea to place a strong plate (10x200x200mm) under the sill to distribute the point load if the columns are placed directly on the sill?
Or do you skip the sill where the columns stand and use the aforementioned plate directly on the leca?
In short, what is usually done?
Best regards, Dennis
I am constructing an extension and will have a gable roof with a glulam beam at the ridge. The beam is supported by two supports in the form of glulam columns with dimensions 140x135mm.
The foundation wall is built up with leca on a concrete footing.
Where the glulam columns meet the "floor," how is it usually done there? Do you place them on the sill (45x170) or on top of the standing floor joists? (if I place 3 side by side, 3x45mm = 135mm) however, that would require 4 "extra" floor joists each measuring 7m.
Could it be a good idea to place a strong plate (10x200x200mm) under the sill to distribute the point load if the columns are placed directly on the sill?
Or do you skip the sill where the columns stand and use the aforementioned plate directly on the leca?
In short, what is usually done?
Best regards, Dennis
I don't think that's something that's "usually done". It's designed by an engineer for each specific load case. It may be necessary to chip up the slab and cast a reinforcing beam.
Depending on how large your roof is, the point load can be up to 5 - 10 tons.
Depending on how large your roof is, the point load can be up to 5 - 10 tons.
The point load per column is 3.6 tons. (I assume, the support reaction on the central beam is 3.6 tons. So it's either 3.6t per column, or 1.8t per column)
No slab. The bottom floor rests on a lecamur which in turn rests on a cast foundation foot (150x500mm)
No complex thing, just wondering how one usually places the columns.
3x upright and possibly screwed together 45x220 should be able to distribute the load relatively well on top of the sill?
A masonry lecamur (4x 600x190x190) on a solid foundation should handle this, right? In my head, it feels overdimensioned, but what do I know, just asking for help
No slab. The bottom floor rests on a lecamur which in turn rests on a cast foundation foot (150x500mm)
No complex thing, just wondering how one usually places the columns.
3x upright and possibly screwed together 45x220 should be able to distribute the load relatively well on top of the sill?
A masonry lecamur (4x 600x190x190) on a solid foundation should handle this, right? In my head, it feels overdimensioned, but what do I know, just asking for help
Can leca withstand such a load? I don't know, but there have been discussions that, for example, Byggmax leca blocks are said to have a slightly lower load class, which limits how high a wall can be built with them (not sure if it's true). But IF there are such limitations, it shouldn't work with a large point load on Leca.
According to Weber, their Leca can withstand 3N/mm2. My column is 135x140mm = 18900mm2
3N = 0.3 kg (approximately)
18900x0.3 = 5670kg max load for the area one of my columns takes.
Max load on my post 3600kg.
Am I thinking wrong?
http://www.weber.se/leca-registred-produkter/produkter/leca-reg-block/leca-block-200.html
3N = 0.3 kg (approximately)
18900x0.3 = 5670kg max load for the area one of my columns takes.
Max load on my post 3600kg.
Am I thinking wrong?
http://www.weber.se/leca-registred-produkter/produkter/leca-reg-block/leca-block-200.html