Don't use a stainless steel bolt (crevice corrosion). SS needs air.

Roger

http://home.insightbb.com/~derbyrm

"Bob" wrote in message
oups.com...
Option 3:

Over drill holes maybe 3/4 inch diam. When drilling do not not go
through the bottom layer of glass. In other words, drill down into and
through the glass layers of the roof....then the balsa core... then
stop.

take a 1/4 or 5/16 inch machine screw/bolt and put head first into the
hole.

pour in epoxy and "pot" the bolt with threads up. When epoxy hardens
now you have a stud sticking up out of your house roof.

Slide your had rail on the studs. Apply goo 4200 or Sikaflex 291etc and
torque down nut... But do not forget the 1/8 inch spacer between the
rail and the roof. I use nickles. cheeper than washers and can use as
money when finished with project. Let goo cure. Torque down.... then
plug.

Ta da........

Other options??

Option 4:
Tear off and throw away. Hand rails are for wimps.

"derbyrm" wrote
Don't use a stainless steel bolt (crevice corrosion). SS needs air.

Not necessarily true. Crevasse corrosion requires a lack of oxygen AND an
electrolyte like salt water. If the rail is properly bedded as recommended
the bolt will remain dry. If it does leak the damage to the interior
headliner will force rebedding long before the bolt is damaged to any
significant degree.

--
Glenn Ashmore

I'm building a 45' cutter in strip/composite. Watch my progress (or lack
there of) at: http://www.rutuonline.com
Shameless Commercial Division: http://www.spade-anchor-us.com

OK. I haven't broken any bolts, but, the theory is that the portion of the
bolt below the line is deprived of oxygen. The same as a keel bolt. The
salt spray and humidity is there for the exposed portion. I don't think
it's a question of leaks.

Roger

http://home.insightbb.com/~derbyrm

"Glenn Ashmore" wrote in message
news:E4%8g.23482$iF3.17843@dukeread01...

"derbyrm" wrote
Don't use a stainless steel bolt (crevice corrosion). SS needs air.

Not necessarily true. Crevasse corrosion requires a lack of oxygen AND an
electrolyte like salt water. If the rail is properly bedded as
recommended the bolt will remain dry. If it does leak the damage to the
interior headliner will force rebedding long before the bolt is damaged to
any significant degree.

derbyrm wrote:
Don't use a stainless steel bolt (crevice corrosion). SS needs air.

Roger


Would bronze or............. be a better choice?
Bob

????

I'd go with double dip galvanized steel, but ...

Bronze is too pricey and weak.

Roger (I don't plan on having lifelines either.)

http://home.insightbb.com/~derbyrm

"Bob" wrote in message
oups.com...

derbyrm wrote:
Don't use a stainless steel bolt (crevice corrosion). SS needs air.
Roger

Would bronze or............. be a better choice?
Bob