Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
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Jan 17 2017

Reference Books & Resources

Category: General InfoLori @ 1:51 pm Comments (5)

As I have mentioned before on this site, I LOVE Adon Brownell’s books about hardware!  Even though they were written way before I was born, I have them all in hard copy; I especially love the illustrations.

Because these books are long out of print they can be difficult to find, so imagine my excitement when an iDigHardware reader posted links to some of Adon’s books in an online archive!  They’re a great slice of hardware history, and some of the information is still valid today.  You can check them out here:

Hardware Age Builders Hardware Handbook
Taking the Mystery Out of Builders Hardware

And speaking of old hardware, Michael Chusid is offering up some antique door and window hardware to anyone who will make a $100 (minimum) donation to the CSI Foundation + pay for shipping.  If any of you are collectors, send Michael an email.


Someone new to the industry recently asked me what books she should read in order to learn about doors and hardware more quickly.  Scott Tobias wrote Illustrated Guide to Door Hardware: Design, Specification, Selection, which is available in bookstores and on  This book was a huge undertaking, and includes comprehensive information as well as photos and details to help clarify the key points.  Here’s a paragraph from the description on Amazon:

When designing, specifying, creating, and reviewing shop drawings for door openings, there are many elements to consider: physical items, such as the door, frame, and hanging devices; the opening’s function; local codes and standards related to fire, life safety, and accessibility; aesthetics; quality and longevity versus cost; hardware cycle tests; security considerations; and electrified hardware requirements, to name a few. Until now, there hasn’t been a single resource for this information.


Where else do you find information about doors and hardware?  I’d love to compile a list of reference books and other resources here, so if there is a publication, booklet, or website that you use, please leave a response in the reply box!

Jan 16 2017

QQ: What is the minimum GWB penetration for a fire-rated frame?

Category: Fire Doors,Quick QuestionLori @ 10:58 am Comments (15)

This question has come up a few times lately…many of us have been taught that sheetrock/drywall/wallboard has to penetrate at least 1/2 inch behind the returns on a fire-rated frame, but where is that stated?

I found the graphic below in NFPA 80 (all recent editions) with a line in Annex A stating that frames should be installed following the general guidelines shown in this figure.  These details don’t cover all applications, and there are some additional details in NFPA 80 which show frames butted to existing walls, without wrapping the GWB.  When in doubt, check with the frame manufacturer to see what is allowed by their listings (and refer to this post regarding existing wall anchors).

I also asked UL what is stated in their requirements, because of an architectural detail in question, which showed one layer of GWB penetrating the frame on each side of the wall, and a second layer butted to the frame.  The representative from UL said that having the frame wrap one layer on each side is acceptable, and the additional wall finish is not required to be wrapped by the frame.

As one of the commenters on this post mentioned, if the rating of the wall requires two layers of GWB on one or both sides, there should not be a gap between the end of the second layer of GWB and the return on the frame, as this leaves a space with less protection than what is required.  I have worked on several projects where the architect wanted a “shadow gap” (AKA “shadow line”) around the frame (like this).  In some cases, a special frame profile with a couple of extra bends may be needed so the extra layer of GWB can butt up to the custom return while maintaining the aesthetic shadow gap.

Got a Quick Question?  Leave it in the reply box!

Image: National Fire Protection Association – NFPA 80

Jan 13 2017

FF: Fire Door Signage

Category: Fire Doors,Fixed-it FridayLori @ 12:05 am Comments (11)

If you read my recent article on code requirements pertaining to signage, you’ll be able to identify the problem with this creative Fixed-it Friday signage on a fire door assembly. Thank you to John Lozano of Allegion for the photos!


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