At the moment I'm just sketching my staircase in a 3D modelling program before I turn it into a real thing. It's a wide U shape, and a double winder.. but I'll just focus on one of the winders for now
The main stair angle I'd like to be 30 degrees, but this cannot be maintained around the winder as the stringers wouldn't mitre. Most of the drawings and kits I look at for ideas have a shallower angle at the winder part..
Is ther a mathematical relationship between the two stringer angles, I wonder? should the winder stringer angle be half, a third etc? How do the factory boys pick it?
Also, am I correct in thinking that it's really hard to mitre two stringers at a 90 degree angle if the two are also sloped at 30 degrees? If a plain 45 degree mitre was cut at a complementary 30 degree angle so the two would mate, I end up with a a pyramid of wood sticking up/ just a mess:
View media item 93933
Is there any technique to make a mitre where two of the angles are not multiples of 90 degrees? would a butt join of one plank against the face of the other be preferable?
The main stair angle I'd like to be 30 degrees, but this cannot be maintained around the winder as the stringers wouldn't mitre. Most of the drawings and kits I look at for ideas have a shallower angle at the winder part..
Is ther a mathematical relationship between the two stringer angles, I wonder? should the winder stringer angle be half, a third etc? How do the factory boys pick it?
Also, am I correct in thinking that it's really hard to mitre two stringers at a 90 degree angle if the two are also sloped at 30 degrees? If a plain 45 degree mitre was cut at a complementary 30 degree angle so the two would mate, I end up with a a pyramid of wood sticking up/ just a mess:
View media item 93933
Is there any technique to make a mitre where two of the angles are not multiples of 90 degrees? would a butt join of one plank against the face of the other be preferable?