Anyone know the issue with the measurement for laying out winders?…The gist was how to layout “even” treads, in thirds, ….that idea? TIA,Phil.
“If ’tis to be,’twil be done by me.”
Anyone know the issue with the measurement for laying out winders?…The gist was how to layout “even” treads, in thirds, ….that idea? TIA,Phil.
“If ’tis to be,’twil be done by me.”
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Replies
May 1991 - Building an L shaped Stair by Larry Haun
Regards,
Dennis
I'm not sure if the code that applied to Larry's stairs hasn't changed. Most of the country now requires a minimum 6 in. tread width at the narrow point of the wedge shaped treads. That complicates things. Jed Dixon had a great article on this topic in JLC within the past year.
Andy
Andy
Never try to teach a pig to sing. It wastes your time and annoys the pig.
Thanks, guys, I found the issue number, I don't have that issue, I started getting FHB later that year
He recently had a tip/article on spacing for winders, kind of an update allowing for the 6" (5" here in B.C.) safe tread depth.....can't locate it either...Thanks again,Phil."If 'tis to be,'twil be done by me."
When in doubt, ask the inspector. That is what we pay them for.Andy
Never try to teach a pig to sing. It wastes your time and annoys the pig.
When in doubt, ask the inspector. That is what we pay them for.That's a very valid point as when push comes to shove he's the guy that has the final say. Several years ago I approached the inspector with a real can of worms staircase. I showed him my drawings and he could see I was pretty much stuck with a borderline none conforming winder he suggested I call it a spiral instead of a winder and it would pass with honors since it met the criteria for a spiral staircase. Had I built it without consulting him I rather doubt I would have been so lucky.
I appreciate all views,... here, in B.C., spirals are No-Go except as secondary stairs, and I need to layout the numbers/dimensions to trial fit some options for the owner, ,I had hoped, before the inspector meddles/muddles.
I am probably going to be able to fit a base at the bottom of the newel to give me my clearance required...and still not impede travel...thanks,Phil."If 'tis to be,'twil be done by me."
Here's Haun on "Laying Out the Winders:"
"Start with a 36-in. square of 3/4-in. plywood. . ." Then begin "with a line snapped from corner to corner. . .Multiply the lengths of plywood by .52 (36 x. 52 = 18.7). In this example, therefore, the distance in from each corner of a 36-in. square is 18.7 in, or about 18 3/4 in. Snap lines through the points you find to determine the winder layout." This formula will work with any size platform.
Once this platform is laid out, "simply build three boxes and stack them one on top of another."
-"Building an L-Shaped Stair" (By Larry Haun) in For Pros By Pros: Building Stairs.-T
Many thanks,cheers,Phil."If 'tis to be,'twil be done by me."
Ya lost me. Do they come to a point, winders can't, by code, come to a point on the small end.
Right . . .the code issue.
Yes, the winders in the formula above do come to a point. However, in the Taunton book (2004), Larry Haun continues:
"Building codes frequently call for a winder tread with a width of at least 9 in. or 10 in. at the line of travel. If this is the case, you'll need a 40"-in.-square piece of plywood to make the platform for a 36-in.-wide flight of stairs. You'll have to project the inside corner point far enough out diagonally so there is enough tread width at the line of travel."-Italics and underlining mine.
"Establish the 36"-in. width of stairs on the plywood . . . Then proceed to lay out the line-of-travel radius and divide it into three equal arcs. Connect points on the arcs with lines leading to the inner corner of the layout to complete the winder layout. This will provide a 10 1/2-in. tread at a 14-in. line of travel."-For Pros By Pros: Building Stairs p. 24; 1st and 2nd pars.
My apologies for any confusion.-T
Makes sense now. thanks
Your code might also require a minimum tread depth 12" out from the narrowest point or at a specified "walk line" distance from the narrow side of the winders.Woodroe