Printed from the blog of Lori Greene, AHC/CDC, CCPR, FDAI
Allegion
Email: lori_greene@allegion.com, Blog: www.idighardware.com or www.ihatehardware.com


Aug 17 2018

FF: Mag-Lock TJ Mount

Category: Electrified Hardware,Fixed-it FridayLori @ 12:13 am Comments (1)
Share

Casey Cohorst from Allegion sent me this Fixed-it Friday photo of an electromagnetic lock that was recently installed on a current project.  Typically, mag-locks are mounted on the push side of the opening under the frame head, with the steel armature mounted on the face of the door.  When the mag-lock must be mounted on the pull side of the opening, top-jamb brackets are used to change the position of the armature.

I’m not a huge fan of the TJ mount (it’s not the most beautiful application), but especially with the particleboard that was added to this installation because of the frame condition.  This will surely weaken the holding force of the mag-lock.

Don’t miss a Wordless Wednesday or Fixed-it Friday post!  Click here to receive daily or weekly email notifications from iDigHardware!


Aug 16 2018

Dwelling Unit Clarifications

Category: Egress,Locks & KeysLori @ 9:32 am Comments (2)
Share

As I have written many times, most doors in a means of egress are required to unlatch with one releasing operation – turning the lever handle, pushing the touchpad or crossbar on panic hardware, etc.  In a past Decoded article and other posts, I addressed an exception to the 1-operation rule – dwelling units and sleeping units in multi-family residential buildings.

Entrance doors to these units – hotel rooms, apartments, condominiums, dormitories, and similar spaces – are allowed by the model codes to have an additional lock such as a deadbolt, security chain, or door guard, and two releasing operations are acceptable.  Based on some recent questions, I’d like to clarify a couple of things.

1) The International Building Code (IBC) limits the exception for two releasing operations to multi-family dwelling units with an occupant load of 10 people or less.*  The occupant load factor for residential occupancies is 200 gross square feet per occupant (this Decoded article explains how to calculate the occupant load), so a 2,000-square-foot dwelling unit has an occupant load of 10 people.**  The IBC exception would not allow a dwelling unit larger than 2,000 square feet to have entrance doors with hardware that requires two operations to unlatch, so a mortise lock with a deadbolt would be the recommended application for those doors.  These large dwelling units are not uncommon, so it’s important to keep this limitation in mind when specifying or supplying hardware.

2) This exception is limited to residential occupancies – as defined by the applicable code.  What looks like a residential occupancy may actually be a different occupancy classification or use group.  For example, a residential board and care facility for 5-16 residents is classified by the IBC as Group R-4, a residential occupancy.  Entrance doors serving the individual units in these buildings could have hardware that requires two releasing operations.  But a residential board and care facility with more than 16 residents is classified by the IBC as Group I-1, an institutional occupancy.  The exception for hardware with two releasing operations does not include institutional occupancies, and these dwelling units would require hardware that will unlatch the door with one operation.  Be sure to verify the occupancy classification/use group before selecting the hardware for dwelling unit entrance doors.

Any questions?

*Note: 1- and 2-family dwellings are covered by the International Residential Code (IRC), not the IBC.  The requirements of the IRC differ from the IBC; the above information applies to multi-family buildings that are required to comply with the IBC.

**Also Note:  It may be possible for a 2,000 SF unit to have an occupant load of less than 10 if the pantry/closet/storage areas are considered accessory storage areas (300 gross square feet per person) and rooms containing mechanical equipment are considered mechanical equipment rooms (300 gross square feet per person) for the purposes of calculating the occupant load.

Photos:  Shutterstock/foamfoto, PDC Midwest Inc.


Aug 15 2018

WW: Mortised PA Shoe

Category: Door Closers,Wordless WednesdayLori @ 12:38 am Comments (0)
Share

This Wordless Wednesday photo was posted on the ClearStar Security Network discussion forum, by Douglas Schneider of Bay Cities Lock and Safe (he was not responsible for this installation).

I’ve never seen this particular closer mounting before…how about you?


Next Page »


This website or its third party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to the use of cookies.

This website or its third party tools use cookies, which are necessary to its functioning and required to achieve the purposes illustrated in the cookie policy. If you want to know more or withdraw your consent to all or some of the cookies, please refer to the cookie policy. By closing this banner, scrolling this page, clicking a link or continuing to browse otherwise, you agree to the use of cookies.