Door Closers: Critical Security Hardware

Author: Brian Rhodes, Published on Oct 14, 2014

It might be the most unappreciated piece of door hardware, but it is one of the most important. Door Closers have an important job: automatically shut doors when they are opened. Why are they so important? Because an open door cannot control access.

In this note, we review Door Closers, examine how they are selected, and how to avoid misusing them.

** ***** ** *** **** ************* ***** ** **** ********, but ** ** *** ** *** **** *********. **** ******* have ** ********* ***: ************* **** ***** **** **** *** ******. Why *** **** ** *********? ******* ** **** **** ****** control ******.

** **** ****, ** ****** **** *******, ******* *** **** are ********, *** *** ** ***** ******** ****.

[***************]

Crucial ******** ****

******* ******* * *********** ****** *******: ***** **** ** ****** before **** *** ** ******. ****** ****** *** ** *** habit ** ******* ***** **** ****** ****, ***** ** ** guarantee ** ** ****** ****** ***** ******* *** ****.  ***** basic ****** ******* ******** ******* ************ ****** *** ** ***** they ** *** ******, ** **** **** ****** ****** ** security ** *** ****** ** ****** ******.

*** ** *** ****** ****** ** **** ********, ******* *** ******** ** **** ***** ****** ***** **** ** relocking *** ************* **** *****, ********** *** **** ** ** open door ******** ****** **** ****** **** ** ****.

Other ********

*******, ******** ** *** *** **** ******* ******* *******. **** *** often ******** **** * ******** *** ***** *******, *********:

  • **** **********: ******* *** ******** ******** *** ********** ************ **** ******** keeping ***** ******. ** ***** ************* ***************** ****** **** ***** ******/****** ** ** ******** ********* *****, door ******* *** **** ** **** *** ***** ********.
  • ***** *********: ********, * ****** **** ****** **** ***** *********. ******* help **** ***** ***** ***** ** ******* ***** ****.
  • **** **********: **** ** **** ******** **'******** ********' ** ***** ** *******************, ******* **************** ** * **** ****** ** ******** *** ******** ** do**'****.*** ******** **** **** ********** **** **** ************* **** ************* ****** ** *********.

Hydraulic *******

**** ****** ******* *** * '*********' (*** ******) *** **** are ******* ******* ** *** ******* **** ** *** ****. In ***** ** ******* ******** ******, ******* **** '******' ***** different ****** *** ******* ***** ** *** **** ** ****. The ***** ***** ***** *********** * ******* ********* ****** ** action. *** *** **** *** ***** ********* ****** *** ****** uses ****** *********?

*** ***** ******* ****** *** ***** ** *** ***-**** **** image *****:

  1. **** *****:**** ***** ** ******* ** ** '****-******' **** ****** *** door ** **** *****, **** ****** ** *******, ** **** wide ***** *** **** *******. *** **** ***** ***** ********* places *** ****** ** * ********** ************ *** ******** **** directional ***** ** * ******** ************, ******* ******** *** **** or *** ******.
  2. *****:**** ** *** '*******' ***** ** *** ******, **** ****** the **** ******. * ******* ** *************** ****, ****** ********* **** **** ******* / ***** ********* *** **** ***** **** *******.
  3. *****:*** ****, **** ****** ***** *** ** *** **** *********: 'latching' ***** *** ***** ****** **** *** ***** *** ******** much **** ****** *** ***** ** *** ************ **** ***** can ***************. ******* ** * **** ******** **** *** ******** *** the *****, *** ***** ***** ** * ********** *****.

Other ****** *****

***** ********* ******* *** *** **** ******, ***** *** **** different ***** **** ** * ****** ** ************:

  • *****************: **** ******** **** **** ******* (******* **** **** ***** open), ***************** ******* *** ***** **** **** ****************** **** **** ******* ** ** *********** ****.
  • **** *********/*********: ***** ************* ****** *** ********** ******, ******* **** *** be ****** ****** *****, ******, ** ******/****** *** ***** ****. Unlike ***** *****, ***** *** ***** ******* *** ********* ** the ******* *** *** *** ** ***** *********** *************************.
  • **********: ** ********* ** ***********-********* ************, ********* ******* *** *** be *********. ***** ******** ** ********** ********, ***-******* ******* (***** with ************ *********** *****) *** **** ** ********* *** **** of ***-***** *****.

Closer **** *** *********

** **** *****,********** ********* ************* ** ********* *** ****** *******. *** **** *** **** be ********* ** *** **** ********, *** ********** **** *** be **** **** ***** *****, *** ***** *** ** ******* for *** ******** *******, *** ********* **** **** **** $***.  Other ******* *** **** *******, **** **********, *** **** ******.

*******, **** ******** ** ********** **** ** *********. **** **********, door ******, ***** ****, *** ******** **** *** **** *** **** a *** **** ** ********* *** ***** ****. **** ****** manufacturers ******* ************** ******* **** **** ** ** *** *********** ****.

Closer **********

********** ******* ********* **** ******** ****** **** ***** ****** ** free ****** **** **** *** ********* ** ********. *** ***** location *** ****** ** ********** ****** ****, *** **** ********* are ***** ** *** ********* ** *** **** *** *** be ******** **** ***** ******** *** **** ***************:

* ****** ** ******** ******** **** ***** ** ** ******** and ******** ******** ******** ** *** ********* *****. ******* ******** ten ** ******* ******* ********* * ****** ***** **** ** ten ***** ** *** ** ******, *** ** *** ** critical *** ******* *** **** ** **** **** ********** ****** control ********.

 

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