The Simpson screws look very similar to the Headloks. I just looked at
the Simpson SDS, and I see they are available in 316 Stainless as well.
That would be my choice near the ocean, but I'm guessing they're spendy.
R.Ray Walters
CTO, Solarray, Inc
Nabcep Certified, Licensed Contractor
808 269-7491
On 2/18/2013 11:08 AM, William Miller wrote:
Ray:
We use the Simpson 1/4 by X" "Strong Drive" (SDS series). We get
them in the hot dip galvanize version. They are readily available
locally. I think building officials like the Simpson name on
structural products. They self drill and we have had no instance of
them snapping off while being driven.
William Miller
At 09:26 AM 2/18/2013, Ray Walters wrote:
I've got a project right now on a steel roof. I was just at a trade
show last week, so I got to look at the latest gizmo from S5.
I didn't like it at all, it didn't go into the valleys like the old
mount, but drilled 4 holes into the side of the ridge, and just
counted on the roofing to hold the modules.
I wanted to use the new ZEP rack, but never heard back from them, I
guess my project is too small (4 Kw).
I'm going with SnapNRack blocks through the ridge top, and I'm going
to go through the purlins into rafters or 2x blocking as needed.
Also, a related subject, I'm using the new HeadLok Lags from
FastenMaster. They claim to be stronger than a 3/8" lag, but they
have a 3/16"D shaft.
I've had trouble with regular cheap Home Depot lags twisting off, so
at least these have actual strength ratings, and don't require
predrilling.
They also have a no rust guarantee....
Has anybody else used these? (or the similar Timberlok)?
Thanks,
R.Ray Walters
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