We have received an initial proposal for building a staircase to the roof terrace as follows:
Now that the house is built and we are about to construct the staircase, our construction contractor wishes to build 4 pillars instead of 1 as in the original proposal
The builder claims that it is not technically possible to build with less than 4 pillars with a wooden structure. No attachment points have been prepared in the house for the staircase, which could have been a smart idea. Does anyone know how to build this staircase with fewer pillars in some way?
Is wood the only option in construction? Glass and steel railings would suit the house well, considering how one imagines the house looks based on the drawings.
In steel, the staircase could be cantilevered if something is found to attach to the wall. Someone will surely fill in here, but the shearing of the screws needs to be kept an eye on. It doesn't require enormous joists and screws to handle the tension in the staircase.
However, the landing at the exit might pose a challenge. It's hard to avoid two columns there without getting wobbling. Perhaps placing a diagonal brace from the column to the underside of the landing, but then you'd likely need a cross brace.
Difficult
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The outermost column feels a bit redundant, isn't there something in the wall to anchor the staircase? Or is a landing needed there as well?
Is wood the only material used in the construction? Glass and steel railing would fit well with the house, considering how one imagines the house looks from the drawings.
The construction is planned to be in wood with a glass railing.
smedbror said:
In steel, the staircase could be cantilevered, if you find something to attach it to in the wall. Surely someone will fill in here, but the shear of the screws is something to keep an eye on. It doesn't require massive beams and screws to handle the tension in the staircase.
It's an interesting idea to use steel, if we knew it could be made cantilevered, that would be an option, but we might need to hire someone who is more skilled with steel.
smedbror said:
The pillar at the far end seems a bit redundant, isn't there something in the wall to anchor the stairs? Or is there supposed to be a landing there as well?
You mean the long pillars? Yes, there is supposed to be another landing at the top because he thought it was difficult to build a curved staircase.
Contact a forge/stair builder and get a quote. Your builder can't have any objections since he doesn't want/can't build the stairs.
To avoid pillars for the landing up there, it might be an option to place brackets out from the wall (think shelves). The position of the brackets has to be adjusted so they are attached to the house's frame. Maybe an alternative to still be able to retain the wood construction.
If it can be anchored somewhere in the house's frame, you can make columns from there instead, so you don't have to have them all the way down to the ground. Judging by the pictures, it is a house with a wooden frame, and then there should be plenty of anchor points.
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