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@...
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