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Grab iron clearance
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Schuyler Larrabee
Roof grabs, specifically.
For a very long time, I've set grab irons mostly by eye, and if there were a group of them, such as on a corner ladder, I'd use a spacer to get them all the same, at least on that one car. I'd use a spacer about *so* thick, to get them all about *that* far from the car side. So, I'm putting on roof grabs on some Plano boards, and I'm about to space them as I have before, but I take a break and while reading Mont Switzer's article on his MP cars, he says "use a piece of .040" to space the corner grabs from the walk . . . " Hmmmm. .040" is 3.5" in HO. Is that right? It seems large to me. I don't think there's anything significantly unusual about this particular aspect of those MP cars . . . . I checked my '31 and '46 Car Builders' Cycs, but there's nothing dimensioned on the couple dozen pages I looked at. I may have missed something . . . So, what's "correct?" I've been using .025, or 2", which looks pretty good to me. And while I'm asking: How do other people go about making and securing these corner grabs to the Plano boards? I've developed a repeatable technique, but I'm curious how others do it. Mine might not be the easiest or best way. SGL |
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Richard Hendrickson
On May 20, 2006, at 9:26 PM, Schuyler Larrabee wrote:
Roof grabs, specifically. I checked my '31 and '46 Car Builders' Cycs, but there's nothing dimensioned on the couple dozenSee the SAFETY APPLIANCES: AAR Standards sections in your Cycs. "Minimum clearance two (2), preferably two and one half (2-1/2) inches." Richard Hendrickson |
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Schuyler Larrabee
On May 20, 2006, at 9:26 PM, Schuyler Larrabee wrote:Thanks, Richard. So, my spacers should be .030", but my .025" have been OK . . .Roof grabs, specifically.I checked my '31 and '46 Car Builders' Cycs, but there's nothinghave missed I'll examine that reference. SGL |
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Brian Paul Ehni <behni@...>
Westerfield kits say .030, IIRC.
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-- Brian Ehni From: Schuyler Larrabee <schuyler.larrabee@...> |
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Andy Sperandeo <asperandeo@...>
Hi Schuyler,
I looked at the 1940 CBC, and while there are no minimum clearance dimensions in the drawings for the corner grabs, the text of the safety appliance section on page 1093 gives 2 inches and preferably 2-1/2 inches as the minimum clearance for "roof handholds." The same minimum clearance applies to side and end handholds, with the note that ladder rungs are handholds within this specification. Two-and-a-half inches in HO scale is .0338", so a .030" spacer would be about right for the minimum. But the Cyc doesn't give a maximum clearance for these handholds. So long, Andy Andy Sperandeo Executive Editor Model Railroader magazine asperandeo@... 262-796-8776, ext. 461 FAX 262-796-11142 |
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Andy Sperandeo <asperandeo@...>
My apologies for an earlier error in arithmetic: 2-1/2 inches in HO is
actually .0287 inches. - Andy |
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Frank Greene <fgreen01@...>
The standards don't have to state a maximum handhold spacing, which will be
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established by the width and height clearances. Frank Greene Memphis, TN fgreen01@... ----- Original Message -----
From: Andy Sperandeo To: STMFC@... Sent: Monday, May 22, 2006 9:44 AM Subject: Re: [STMFC] Grab iron clearance Hi Schuyler, I looked at the 1940 CBC, and while there are no minimum clearance dimensions in the drawings for the corner grabs, the text of the safety appliance section on page 1093 gives 2 inches and preferably 2-1/2 inches as the minimum clearance for "roof handholds." The same minimum clearance applies to side and end handholds, with the note that ladder rungs are handholds within this specification. Two-and-a-half inches in HO scale is .0338", so a .030" spacer would be about right for the minimum. But the Cyc doesn't give a maximum clearance for these handholds. So long, Andy Andy Sperandeo Executive Editor Model Railroader magazine asperandeo@... 262-796-8776, ext. 461 FAX 262-796-11142 SPONSORED LINKS Train travel Train travel uk Train travel in usa Train travel vacation Freight car Canada train travel ------------------------------------------------------------------------------ YAHOO! GROUPS LINKS a.. Visit your group "STMFC" on the web. b.. To unsubscribe from this group, send an email to: STMFC-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. ------------------------------------------------------------------------------ |
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Larry Grubb <larry450sl@...>
Schuyler,
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I was given the gift of an old grabiron off of a wood-sheathed box car (Exact type unknown) that is sitting on my desk. The clearance is 2-1/2 inches, the diameter is 3/4 inch, the inside width (clearance) is 16-1/4 inches, the mounting holes are on 20 inch centers, the thickness at the mounting hole is 1/2 inch and the outside diameter around the mounting hole is 1-3/4 inches. Whether this is "standard" or not, I cannot say, but it seems typical in my experience. Larry Grubb ----- Original Message -----
From: Andy Sperandeo To: STMFC@... Sent: Monday, May 22, 2006 9:44 AM Subject: Re: [STMFC] Grab iron clearance Hi Schuyler, I looked at the 1940 CBC, and while there are no minimum clearance dimensions in the drawings for the corner grabs, the text of the safety appliance section on page 1093 gives 2 inches and preferably 2-1/2 inches as the minimum clearance for "roof handholds." The same minimum clearance applies to side and end handholds, with the note that ladder rungs are handholds within this specification. Two-and-a-half inches in HO scale is .0338", so a .030" spacer would be about right for the minimum. But the Cyc doesn't give a maximum clearance for these handholds. So long, Andy Andy Sperandeo Executive Editor Model Railroader magazine asperandeo@... 262-796-8776, ext. 461 FAX 262-796-11142 SPONSORED LINKS Train travel Train travel uk Train travel in usa Train travel vacation Freight car Canada train travel ------------------------------------------------------------------------------ YAHOO! GROUPS LINKS a.. Visit your group "STMFC" on the web. b.. To unsubscribe from this group, send an email to: STMFC-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. ------------------------------------------------------------------------------ SPONSORED LINKS Train travel Train travel uk Train travel in usa Train travel vacation Freight car Canada train travel --------------------------------- YAHOO! GROUPS LINKS Visit your group "STMFC" on the web. To unsubscribe from this group, send an email to: STMFC-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- --------------------------------- Sneak preview the all-new Yahoo.com. It's not radically different. Just radically better. |
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Andy Sperandeo <asperandeo@...>
Way to go, Larry. That's a source that few could argue with. - Andy
Andy Sperandeo Executive Editor Model Railroader magazine asperandeo@... 262-796-8776, ext. 461 FAX 262-796-11142 |
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Schuyler Larrabee
Schuyler,Geez, Larry, you're really raising the bar here . . . .8^) Thanks a lot. SGL |
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I was given the gift of an old grabiron off of aWhat a forehead slapper! As Jimmy Buffet would say, it was so obvious it plumb evaded me. I have a grab iron here that came from the Milwaukee shops in Deer Lodge. I don't know what it's off of, but it's black with boxcar red on the ends where it bolts to the car side. Here are the comparable dimensions. Clearance is 2 �", diameter is 5/8", inside clear width is 23", mounting holes on 24" centers and offset 1�" from center of grab bar to center of bolt hole, �" mounting hole with square head bolts, and 1�" diameter around the mounting holes. Dan Stinson Helena, Montana |
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