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September 30, 2001

                   Northwest NICET Newsletter 
================================================================
Volume 1 Issue 14                                      9-30-2001
================================================================

        News for Fire Protection Engineering Technicians
        ------------------------------------------------

Contents:
---------
- News
- Tech Stuff
- Test Dates
- Class Schedule
- Administrivia

================================================================
NEWS
================================================================

The WBFAA Trade Show is scheduled for Friday, November 2, 2001 in
Spokane, WA. For more info visit http://www.washingtonbfaa.org.

================================================================
TECH STUFF
================================================================

'either-or' proof
---------------
When laying out a system of detectors in the real world, we find
irregularly shaped areas that are difficult to work with, unless we use
the '.7 times listed spacing' requirement. It is easy to use an
inexpensive compass set to .7 times listed spacing to determine detector
spacing and placement.

The .7 requirement can be illustrated using Pythagorean's Theorem;

a^2 + b^2 = c^2

Imagine a hallway, which is 10 feet wide and has a smoke detector (x)
located near one end. Superimpose a triangle over the hallway and assign
a, b, and c to describe its sides.

x = smoke detector
a = height
b = base
c = hypotenuse

|    x    |
|   /|    |
|c / |    |
| /  |a   |
|/   |    |
+----+----+
  b

Substitute one-half listed spacing (.5S) measured perpendicular from the
perimeter walls to the detector for a and b;

a = .5S
b = .5S

Then subtitute these values for a and b in Pythagorean's Theorem;

a^2 + b^2 = c^2

(.5S)^2 + (.5S)^2 = c^2
  
.25S^2 + .25S^2 = c^2

.5S^2 = c^2

sqrt(.5S^2) = sqrt(c^2)

.707S = c

Now work back through the formula to determine dimension 'a' for the
hallway. The hallway is 10 feet wide (b = 5').

Substitute .707S for 'c' where listed spacing (S) is given as 30';

.707S X 30' = 21.21'

Then substitute this value, 21.21', for 'c', and substitute 5 feet for
'b' (which is one half the width of the hallway) in Pythagorean's
Theorem, then solve for S;

a^2 + b^2 = c^2

a^2 + 5^2' = 21.21^2'

a^2 + 25' = 450'

a^2 = 450' - 25'

a^2 = 425'

sqrt(a^2) = sqrt(425')

a = 20.61'

Furthermore;

if a = 20.61'

and a = .5S

then .5S = 20.61'

.5S / .5 = 20.61' / .5

S = 41.23' for a smoke detector with a listed spacing of 30 ft!

================================================================
TEST DATES 
================================================================

Oregon
------
PCC Sylvania, Portland;
Test 11/19/01. Postmark deadline 9/29/01.

Clackamas Community College, Oregon City;
Test 11/19/01. Postmark deadline 9/29/01.

Washington
----------
Bates Technical College, Tacoma;
Test 11/19/01. Postmark deadline 9/29/01.

Walla Walla Community College;
Test 12/14/01. Postmark deadline 10/27/01.

Spokane Community College;
Test 10/20/01. Postmark deadline 9/1/01.

Idaho
-----
Boise State University;
Test 11/17/01. Postmark deadline 9/29/01.

Ricks College, Rexburg;
Test 12/15/01. Postmark deadline 10/27/01.

Montana
-------
Rocky Mountain College, Billings;
Test 10/20/01. Postmark deadline 9/1/01.

Montana Tech, University of Montana, Butte;
Test 11/16/01. Postmark deadline 9/29/01.

MT State University, Bozeman;
Test 12/15/01. Postmark deadline 10/27/01.

Flathead Valley Community College, Kalispell;
Test 11/17/01. Postmark deadline 9/29/01.

For a complete list of all test centers and test dates, point your http
client to --> http://www.nicet.org/tests.shtml

================================================================
CLASS SCHEDULE 
================================================================

Clackamas Community College is sponsoring a 16-hour Saturday Seminar(r)
in October:

--> 10-20-2001 8am - 5pm NICET Certification application process and
Fire Alarm Systems Level I Element Review

--> 10-27-2001 8am - 5pm Fire Alarm Systems Level II Element Review

Visit http://www.lerc.org for more information and to register.

================================================================
ADMINISTRIVIA 
================================================================

Send your contributions, suggestions, comments, and questions to -->
mailto:TheBakerGroup@home.com

To unsubscribe, click the reply button and type 'unsubscribe' in the
subject line.

Good luck and have fun!

Mike  http://go.to/baker

================================================================
NW NICET Newsletter Copyright (c) 2001 Michael B. Baker
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