G'day welcome back to Buildsum and in this video. I want to talk about
stair components and some stair
Terminology, so here's a set of stairs. We're going to build and
Obviously the platform or floor whatever that we're going to go up to
So I'm going to now I'm going to get rid of this set and we'll bring it back in bit by bit
The first thing you needed a is a couple of dimensions one is the rise of flight
So obviously this is the height that the stair is going to go from now even though. I've shown it from
This point here up to this point here
That is not always the correct measurement because sometimes with the external stairs the ground is not level
So the point that the stair leaves from or starts at is
going to be different to this point back here, so the riser flight is always from the
bottom of the first step
to the top
of the last step
so you need to
just be aware of that if you're outside you need to make sure you can level
wherever the Stairs start from back to
back to the wall or the deck so you can get that rise flight
You also have the going of the flight which is from the front of the first step to the the back of the last one
so that
the
First step is going to start where that going of flight measurement comes to
We have our stringers or our support members for our stairs, they don't always have to be timber
but they support our stairway,staircase and
there called a stringer or a string
Yeah, so that's what they are
Then of course have our treads
Yeah, be careful. We don't get these mixed up with our goings
going is just a dimension, tread is a physical thing so in this case our trades are made up of three different
pieces of timber
if you do make your treads out of three different pieces or several pieces of timber
You have to have a gap between them to allow the water through them
they can't just have them, butted up as one member or
they can be one continuous source one single Wide board
The gap or in some cases the piece of timber
between our
Treads is referred to as a riser
This particular set of stairs is an open riser staircase that has no riser
But that's what that's referred to a lot of internal stairs would have a riser board in there closing that gap up
then have our newel posts to support our handrail and
in between filling in the gaps
you have our balusters
Now our balusters, handrail, and Newel post all go together to make up our balustrade
something that's commonly referred to as the handrail but it's actually a
Balustrade and it's made up of those three members Newel post hand rail and balusters
So there two main components. There are a couple of
terminology
we had the rise of flight we also have the rise of step so the rise of the step is the distance from
the top of
one step to the top of the next step or from the ground where we start
to the top of the first one so that is the rise of step it has to be a consistent measurement if
We're out by even a couple of millimeters we will get trip
problems or with our stairs, so the rise of step is always a constant
dimension
We also have the going of our step which is a measurement from the front of one step
to the front of the next one again that needs to be a constant dimension because
we can get trip hazards again if that's not constant and notice
even though I've got the going of the step comes to their tread is actually a little bit wider
That's not a problem. That's why we don't want to get our treads and our goings mixed up
So going of a step is just a dimension from front of the first step
To the front of the next one whereas the tread is
Just the actual timber itself
We also have this distance here
which is referred to as the Margin it's the distance from the edge of our stringer to the points of our stairs and
that can be anything you like you could even have no margin if you wished we could have a negative Margin but
Most of stairs I build have a 50mm margin
and
underneath we're required with external stairs to have some sort of
galvanized
Threaded Rod to tie our stairs together
You can still have the treads nailed in but we need to have tie rods placed underneath our treads
Roughly every
1350 One top one under the first
somewhere at the start under the first couple steps one under the top couple of steps and every 1350 in between
So there you go. There's our external staircase and all the components and terminology that go with it