[RE-wrenches] TJI rafters

[Lorenzo Ortiz]

It is possible according to Weyerhaeuser.



On Wed, Mar 7, 2018 at 12:50 AM, Matthew Sirum <matthewsirum at gmail.com>
wrote:

> Greetings Jerry,
>
> I believe I remember reading some Trus Joist technical documentation
> which indicated no more than one hole should be drilled or lag
> screw/bolt driven into any cross sectional area of the top flange.  If
> using the Quick Mount Q-Base with two lag screws/bolts, will you be
> orienting the Q-Base so that the two lags are in line vertically with
> each other or side by side?...  Seems like side by side (straddling
> the web) may not be a good approach.  Staggered vertically (straddling
> the web) may be alright if the size of the holes and lags are
> appropriate for the top flange dimensions and can be installed where
> allowed by the rafter/joist manufacturer's specifications.
>
> I hope you are able to accurately identify the rafter/joist
> manufacturer and the rafter/joist model so you can reach out to them
> for guidance on what are and are not acceptable attachment methods for
> their product.
>
> Other thoughts:
> If access to the underside of the roof structure allows, installing
> appropriate blocking with proper hangers and fasteners would likely be
> a more robust way to go.
> I have looked into using stainless steel j-bolts to hook the underside
> of the rafter members in situations like this as well; the rest of the
> install from the top side is just like working with hanger bolts.
> If the roof decking/sheathing and its attachment fasteners and
> schedule are all known and sufficient, a multi-fastener deck mount
> type mounting product may possibly be an appropriate and labor/time
> saving option.
>
> Best regards,
>
> ----MATT
>
> Matthew Sirum
> P.O. Box 1227
> Greenfield, MA 01302-1227  USA
> phone: +1.413.773.0611
> email: MatthewSirum at gmail.com
>
>
>     ----------  Original Message Below  ----------
>
> [RE-wrenches] TJI rafters
> Jerry Caldwell solarcowboy at yahoo.com
> Tue Mar 6 15:57:04 PST 2018
>
> Bill,
> Mineral bitumen roll roofing. 2:12 slope.
> Everyone who gave input below, thanks for the suggestions.
> I've decided to go with the Quick Mount Q-Base product. It allows you
> to get 2 lag bolts into the top chord on either side of the OSB web.
> Cheers,Jerry Caldwell
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-- 
*Lorenzo Ortiz   Commercial PV Designer*

    lorenzo at cal-solar.com*  (530) 274-3671*

-- 
 <http://californiasolarco.com/referral-program/>
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