finding those rafters... [RE-wrenches]

[William Miller]

Here's how we do it:

We locate carefully where we THINK the rafter is.  We draw an outline of
the mounting foot.  Within (hopefully) that outline, we drill a series of
3/16 pilot holes to locate both edges of the rafter.  The middle of the
rafter, curiously, is halfway between those edges!  (It is sometimes
difficult with that small a pilot bit to actually discern if you are
drilling into a rafter or experiencing resistance from the bit against the
roofing and sheeting.  If in doubt, a small piece of wire can plumb the
hole to determine if there is air or wood at the bottom of it.)

William Miller


At 07:01 PM 3/24/2003 -0800, you wrote:
>Yes... hitting rafters ON CENTER is the predominate thing when mounting
PV's on a
>roof. Does anyone have any special tricks in locating them other than
meticulously
>measuring from the end of the roof? Stud finders are pretty useless on roofs.
>

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William Miller
Miller Power and Communications
PO Box 50, Santa Margarita, CA 93453
Voice :805-438-5600     Fax: 805-438-4607	
email: wrmiller at slonet.org
http://millerpowerandcomm.com
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