an old welder (with armature)

[BukitCase]

Yeah, love the DeWalt - 4 settings of aggressiveness and a blower is nice. Used it to radius the upper end of the risers so they'd swing on a 5/8" bolt between two pieces of 3x3x1/4" angle which are bolted to the double 2x12 across the face of the mezzanine.

When the stairs are down, the lower edge of the risers also rests on ANOTHER 5/8 bolt thru the angle iron pivots. Doubt it's gonna fall anytime soon....

The treads are 3/4 ply, 10" x 36", no center riser (weight saving) - so all treads have 3-1/2" ribs under them for stiffening/span. I finished all the tread install later today, no pics yet.

There'll be a chain fall on the built in place roof truss right above the lower end of the staircase, gotta weld up a spreader that'll pin on to the stair risers so I'm not trying to pull a tread up (loose) when I raise the steps out of the way... Steve

BTW, that spreader will be welded/(polished???) so I'm only 98% off topic here

 

[Sodo]

I don't know why they call it that but railroading refers to plywood oriented to span the joists in the non-axis direction. I suppose it implies the floor is soft between the joists.

I think I have to take that back. If there was no rib you would ideally set the plywood strength axis going left/right, or spanning across to each stair horse. But with those ribs under each tread a guy could make a case that it's NOT railroaded, that the plywood strength axis supports the front & back of each tread.

OK now I understand how get into your refrigerator.:thumbsup:

 

[Big Barn]

I don't know why they call it that but railroading refers to plywood oriented to span the joists in the non-axis direction. I suppose it implies the floor is soft between the joists. I think I have to take that back. If there was no rib you would ideally set the plywood strength axis going left/right, or spanning across to each stair horse. But with those ribs under each tread a guy could make a case that it's NOT railroaded, that the plywood strength axis supports the front & back of each tread. How the heck to you get into your refrigerator?

I'm sure he took the beer out BEFORE he built the steps.

Terry

 

[Sodo]

Yep gotta keep one step ahead!

 

[BukitCase]

Yeah, that was the idea on the "ribs" or "railroads" or "spines" - my feet don't know the difference but they do know I ain't gonna break thru those treads :thumbsup:

Oh, and the frig is a dead freezer with a light bulb in the bottom, driven about half power with a HF "router speed control" - before I did that, I replaced bulbs about once a month - after, it's been just under 2 YEARS on the same bulb -

plus, what's in that box would probably keep 20 of my closest friends drunk for quite a while if they could sell it for what I have into it - several spare blades for the table saw, radial saw, and 2 chop saws - solid carbide and carbide tipped router blades for molding, box making, flooring making, cabinet door sets, extra jointer and planer blades, high end table saw miter guides, alignment instruments, pretty much anything spendy and portable is either in there or in my old studio behind double deadbolted doors. Keeps things warm, dry and still mine

I'll post more in a few days when I've actually done some polish...(er, I mean WELDING - yeah, that's the one )

 

[k0ua]

Dunno about polishing - maybe sanding, or drilling pocket holes - this pull-up staircase I'm almost done with has 527 pocket holes total, 4 full sheets of 3/4 ply, and weighs about 240 pounds total - with the 3-1/2" ribs under each tread there's zero give, and the double thickness of 3/4 glu-lammed risers flex just under 1/8" when I bounce on the middle. The mezzanine is 1-1/8 T&G ply over 2x12's, so I wanted it to not sag with me and as much as I can carry up or down - think I pulled it off :laughing:...Steve

That is pretty cool Steve:thumbsup:

 

[BukitCase]

Thanks James - besides making enough floorspace for the big saw and in/outfeed and handling full sheets of 3/4 ply alone, the angles/spacing got a little tricky - when I converted the 36x48 pole barn, I wasn't intending on it being mostly a wood shop so I had the concrete guy put a 1" in 12 foot slope toward the big door -

So I measured everything in the field, duped it in CAD and kept rise/run "gentle" to accomodate an old fart carrying more than he should :laughing:

Surprise - I only had to do one "minor" tweek and it actually fit - most of the screws are 2", they lack about 1/8" of coming thru the outsides of the risers so they reinforce the glue lam (not that it'd be necessary)

Here's a jpg of the overall cad layout, shows the top pivots. Sorry, didn't convert the details but (ahem) this DID start out being about an old welder :ashamed:.. Steve

 

[Sodo]

(ahem) this DID start out being about an old welder :ashamed:.. Steve

if you put it that way maybe its still on-topic

 

[BukitCase]

'Scuse me, but that's "old weldEr", not "old weldOr"

 

[Sodo]

yup 3-phase in the old days now lucky even finding a single phase outlet to plug into