Stringer Techniques?

Jason Whipple

I can't believe in all the years of building I have never had to do this and now I'm stuck!

I have a set of wrap around steps to an upper level deck that has two 45 deg angles (going up on an inside corner). I was pulling my hair out today trying to figure out how to get them cut!!!

Looking for some help on this one, the way I was going to go about it would take a while and I know there must be an easier way.

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Historic House Restoration, Cincinnati, Ohio
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Jason Whipple

Just to clarify, it's the 22.5 deg. stringers I'm having difficulty with. The ideas me and the guys were coming up with seemed like a clunky way of going about it.

I'll scan in a drawing shortly.

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Jason E Whipple, General Manager
Historic House Restoration, Cincinnati, Ohio
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DavidC

Boy a pic or sketch would help here. Is there a platform landing at the turns?

Good Luck
Dave

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Dan_Watson

Pictures

Jason Whipple

OK here is one of the sketches.

My plan is to have a full stringer on each side of the 22.5's but how do I get the points to cut them? I know I need to cut the riser portion at 22.5 but it's the length of the tread that is throwing me off

There must be a mathimatical way of doing this.

Geezus!!!!!

I can't download a tiff; give me a minute!

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Historic House Restoration, Cincinnati, Ohio
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orson

Waiting for the pics, but remember...

Take a deep breath....let it out slowly.....

There is a solution, you will master it, and at the end you will stand back and wonder why you were so worried.

Breathe.

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Jason Whipple

Got it (I think)

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Historic House Restoration, Cincinnati, Ohio
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orson

The depth of the tread cut on the stringer is going to be Square route of [2 x (depth of the tread squared)] minus [2x (depth of the overhang of tread squared)]

A squared + B squared= C squared

A and B are both the same, the depth of the tread so C is the length of the mitre, but you have to subtract the overhang of the tread.

Is that what you were looking for?

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DavidC

Now I see. I would go a double stringer on each corner, with the risers cut back to match the angle of the deck. Probably easier in the long run than a compound cut on one stringer and gives you more support under the tread anyway.

I hope you get what I mean. I sometimes have trouble posting with just text.

Good Luck
Dave

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Jason Whipple

The stringers that are on an angle have to have a longer run and the tread as well in order to make the turn. The straight stingers are no problem, it's just the inside corner stringers I can't figure out.

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Jason E Whipple, General Manager
Historic House Restoration, Cincinnati, Ohio
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Jason Whipple

Exactly what I want to do, just getting the cut points is throwing me for a curve

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Jason E Whipple, General Manager
Historic House Restoration, Cincinnati, Ohio
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Ahren

Take whatever you're using as a tread, cut it at 22.5. Measure. There's your length. Subtract for nosing, riser.

Meetre

string line, levels? put something across the other stringers that will cross points and let you see where it needs to be. then, make that peice.

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Meetre

or what Ahren said

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Jason Whipple

awsome idea!

Thanks Ahren!

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Jason E Whipple, General Manager
Historic House Restoration, Cincinnati, Ohio
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Ahren

No problema.

I should add:

When you subtract for your nosing & riser, hook your tape on the edge of the board and come straight back to the angled end of the board. Don't hook the long point of the angle and come down the angle. Does that make sense?

Jason Whipple

Perfectly

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Jason E Whipple, General Manager
Historic House Restoration, Cincinnati, Ohio
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neolitic

After you get them cut,stick a 2X6
between the left hand and right hand
sides to beef them up...their gonna look
weird and scrawny.
That will also let you screw the tread
farther back from the joint.

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orson

My post was for a 45deg mitre which you probably already noticed

Since I'm a glutton for punishment(not really cuz I didn't get any yet) but more because I love math(I know, it's sick) here's how you would find the stringer tread cut depth using trig, in the example the regular stringer depth is 6 inches:

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Danno6102

A good CAD program is your friend. when you have something funky, sit down & take a couple hours to draw it up & dimension the crap out of it. Print out the drawing & cut it on site. I do this all the time. It eliminates those "been a long day" miscalculations which I have a habit of making, even first thing in the morning .

Dan