Correspondence 06/08/00 THtT 15:24 FAX 503 581 8294 E/D ASSOC, 14,11,0140V0 _ O00`J-' 002
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EPPING /DEFFENBAUGH ASSOCIATES, P.C.
• Architecture • Planning • Interior Design
June 8, 2000
Bob Poskin
City of Tigard
Building Department -
13125 SW Hall Boulevard
Tigard, OR 97223
RE: High -Piled Storage - Smoke and Heat Removal, Section 8102.7
7400 SW Landmark Lane
Building Permit #2000 -0175; Comments from Letter Dated May 17, 2000
This letter is to follow up on your letter of May 17, 2000 regarding ;;Mechanical" (last item, unnumbered)_
Your May 17 statement was surprising to me since during our numerous conversations in the past year about
smoke and heat evacuation for this project, you have not expressed any objection to the proposed method.
As you recall, initially we thought high -piled storage would remain in the "existing building." We discussed
(with Jim Funk) how this would occur. The area required for gravity ventilation would have meant extensive
penetration to the existing standing seam roof. Retrofitting is very difficult in the standing seam metal roof.
The issue of heat loss was also a concern. Power ventilation fans retrofitted into the existing building walls
were discussed at that time as an alternate, with no objection from Jim Funk or you.
Due to company acquisitions and market conditions, the building tenant, Bonita Products, delayed
commitment on renewing or leasing any space. The property owner was committed to constructing this new
building based on expenditures to that point. The new building matches the construction of the existing
building. At that time it was probable that Bonita would not occupy any portion of the new building_ As the
project neared completion, Bonita did commit to occupying the entire building. It was determined that the
best use of the entire facility was to place all high -piled storage in the new building. Since high -piled storage
has always been part of our discussions for Bonita, no objection to mechanical ventilation had been
expressed, and since the new construction matched the existing, it seemed logical to proceed as we had
•
previously discussed. Approval by the fire chief was not previously discussed.
All the parties involved urgently want to put this project in the "closed out" stage. Please clarify in writing
(fax) your objection to the proposed smoke and heat evacuation systems at the earliest possible time.
Sincerely,
EPPING/DEFFENBAUGH ASSOCIATES, P.C. ARCHITECTURE
Lonny D4fenbau h, Presidl
c: Glenn Hayter, Owner
Jack Wright, Bonita Products
Don Sheets, Elliott - Sheets Construction
Ron Melott, Melott & Associates, Inc.
200 HAWTHORNE AVENUE S.E. SUITE A -102 SALEM, OR 97301 (503) 585 -1500 FAX 581 -8294
" - en, °9,Z,
Melott and Assoc Inc.
Fire Protection Consulting
April 26, 2000
Memorandum
To Whom It May Concern:
From: Ronald K. Melott, PE, Fire Protection Engineer
RE: Curtain Boards and Smoke and Heat Venting
Bonita Products Addition
7400 SW Landmark Lane
Tigard, Oregon
Under Unifoim Fire Code (UFC) Sections 8102.7, 8102.8 and Tables
81 -A and 81 -B, smoke and heat removal and curtain boards are
required in areas for high -piled combustible storage. The
exception to UFC Section 8102.7.1 allows for alternate methods to
be approved by the chief. Because of the ineffectiveness of roof
ventilation and that this fact is recognized by UFC Standards 81 -1
and 81 -2, Sections 3 -2 and 3 -3 respectively, and that fire
protection design parameters in these standards are developed
without consideration for provision of draft curtains and smoke
vents, it is proposed to not provide roof vents in this building
addition. Tests have shown that roof vents are not able to
function as intended in buildings equipped with automatic fire
sprinklers. If the vents operate before the sprinklers, the
effectiveness of the sprinkler system is lessened and if the vents
operate after the sprinkler system, there is not enough of a
thermal plume left to lift the heavy moisture laden smoke up
through the sprinkler discharge. It is also desirable to put
ventilation practices under the control of the fire officers on-
scene.
Therefore, it is proposed to provide four 30,000 cfm mechanical
fans in the side walls of the building for smoke removal instead of
the code required roof vents. The fans will be operable by manual
switch at the fire control room and therefore under the control of
Bonita Products, Tigard OR
Epping Deffenbaugh Associates
bptrdOml.eda
4/26/2000 1
11650 S.W. Bel Aire Lane • Beaverton, Oregon 97008 -5908 • (503) 643 -5608
FAX 643 -5608 • Pager 295 -4684 • e -mail rkmelott@juno.com
the fire officers. Make -up air will be provided by opening
appropriate overhead doors on the opposite side of the building for
make -up air. This provides the fire department the option of the
specific direction of air flow according to the specific fan(s)
operated. Overhead doors can be manually operated and secured in
the open (or partial open) position according to the ventilation
procedures. (See UFC Standard 81 -2 Section B -3 -3)
With today's sprinkler head technology, the need for curtain boards
to control the number of operating sprinklers has become passe.
Tests have shown that often curtain boards interfere with sprinkler
operation causing sprinklers to be less efficient or to
unnecessarily open more sprinkler heads than necessary. It is
proposed to not provide curtain boards with this sprinkler design
of 0.495 gpm per square feet over 2000 square feet using K =11.4
heads.
RKM /mm
PRO .
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Bonita Products, Tigard OR
Epping Deffenbaugh Associates
bptrdOml.eda
4/2672000 2