Report (2) P2020-6 2/27
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FIRE PROTECTION CONSULTING
3115 NW 132"d Place, Portland,OR 97229-7037 RECEIVED
Phone 503-531-8717 e-mail dgessert@frontier.com
Letter MAY 2 0 2020
CITY OF TIGARD
Date: May 12, 2020
LDING DIVISION
HobbyKing 053
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14140 SE 72nd Ave, Suite 130 �GiN{4
To: Tigard, OR 97223 `c 9
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Sent via Email .� ��,,,.,,
Attention: Dustin Nichols -4
David Gessert, P. E. I REs'ori3afa.t 1
From: Fire Protection Engineer
High-Piled Rack Storage of Combustible Materials
Subject/Project: HobbyKing
14140 SE 72"d Ave, Suite 130
Tigard, OR 97223
Job No.: 2020-27
Total Pages: 4
Introduction
HobbyKing is planning the installation of new pallet racks at their leased facility located at 14140
SE 72nd Avenue, Suite 130, Tigard, OR. This letter addresses the requirements of Oregon
Structural Specialty Code 2019 Edition, Section 435 and Oregon Fire Code (OFC) 2019 Edition,
Chapter 32 for the new pallet racks. Shelf storage is also addressed. Both pallet rack storage
and shelf storage were found to be code compliant based on the description in this letter.
HobbyKing is an online retailer providing Radio Control (RC) planes, drones, helicopters, cars,
boats as well as batteries, chargers, radio equipment, robotics, servos, 3D printing,tools, bags,
storage, and the like. This material is consistent with a Class IV Commodity or less of a fire
hazard.
Existing fire sprinkler protection for the HobbyKing's space is 0.495 gpm per square foot over a
design area of 2,000 square feet as shown on the hydraulic data nameplate located at fire
sprinkler riser. The fusing temperature is unknown of the fire sprinklers installed at the ceiling of
HobbyKing's warehouse. The conservative approach is to assume the ceiling fire sprinklers
have an ordinary-temperature rating.
Ceiling height of the HobbyKing's space varied between 23.7 to 26.8 feet as measured with a
laser distance meter. HobbyKing has investigated the storage planned for the SE 72"d Avenue
warehouse. They have determined the maximum nonexpanded plastic weight per pallet is 5
Letter to Dustin Nichols
May 12, 2020
Page 2 of 4
percent of the total pallet load weight. Additionally, HobbyKing has determined that the
maximum expanded plastic volume is 10 percent of the total pallet volume. This material has a
fire hazard classification of a Class IV Commodity. See OSSC (2019) Figure 435.3.8(1) and
OFC (2019) Figure 3203.9(1).
Based on the above information the open rack storage has a maximum code compliant storage
height of 18. See National Fire Protection Association (NFPA) 13, 2016 Edition, Standard for
the Installation of Sprinkler Systems, Table 16.2.1.3.2 and Figure 16.2.13.2(d). For shelf
storage the maximum code compliant storage height is 15 feet. See NFPA 13 (2016) Figures
14.2.4.1 and 14.2.4.3 and part 14.2.1(2).
HobbyKing's planned maximum storage heights are 16 feet for the open rack storage area and
12 feet for the shelf storage area.
OSSC (2019) Section 435 and OFC (2019) Chapter 32 Considerations
Provisions of OSSC (2019) Section 435.2 and OFC (2019) Chapter 32 3201.3 are addressed as
follows:
1. For the floor plan of HobbyKing's space showing locations and dimensions of high-piled
storage see drawings prepared by Northwest Handling Systems.
2. Ceiling height in the HobbyKing's warehouse space varies between approximately 23.7
feet to 26.8 feet. Useable storage height varies between approximately 15 to 18 feet
based on the how material is stored and limitations of the fire sprinkler system.
3. The number to tiers within each storage rack is four and is shown on the drawings for
Northwest Handling Systems.
4. Clearance between the top of the rack storage and the fire sprinkler deflector varies
between approximately 6.7 feet and 9.8 feet based on a maximum rack storage height of
16 feet.
5. Aisle width in the pallet rack area is greater than eight feet. See drawings for Northwest
Handling Systems.
6. No solid-pile storage is planned for the HobbyKing's space that is above 12 feet in
height.
7. Material stored in the new pallet racks in the HobbyKing's warehouse is consistent with a
Commodity Class IV or less of a fire hazard.
8. No banded or encapsulated commodities are planned.
9. Since the high-piled storage area planned for HobbyKing is less than 12,000 square
feet, building access is not required. See OSSC (2019) Table 435.5.1 and OFC (2019)
Table 3206.2
Letter to Dustin Nichols
May 12, 2020
Page 3 of 4
10. Based on information on the hydraulic data nameplate at the fire sprinkler riser for the
existing warehouse fire sprinkler protection is designed to a minimum of is 0.495 gpm
per square foot over a design area of 2,000 square feet.
Fire detection is not required and none is it installed in the warehouse. See OSSC
(2019) Table 435.5.1 and OFC (2019) Table 3206.2
11. The fire sprinkler riser for the building is installed on the west side of the building closest
to SW 72nd Avenue. It accessed through that tenant's space.
12. Smoke removal (roof vents) and curtain boards are not required and they are not
installed. See OSSC (2019) Table 435.5.1 and OFC (2019) Table 3206.2
13. Provision for longitudinal flue spaces has been provided in the pallet rack design. See
the drawings prepared for Northwest Handling Systems. One of the following two flue
space options are required for double row pallet racks:
Option 1: Six-inch transverse flue space with no longitudinal flue space.
Option 2: Three-inch transverse flue space and 6-inch longitudinal flue space.
14. No additional information has been requested by the jurisdiction regarding design
features, commodities, storage arrangement, and fire protection features.
Conclusion
Both pallet rack storage and shelf storage were found to be Code compliant based on the
description in this letter.
Letter to Dustin Nichols
May 12, 2020
Page 4 of 4
Appendix— Hydraulic Data Nameplate at Fire Sprinkler Riser
............ .. flED;t0 i -
FEHr
Th. •uilding is protected
by a draulically Designed
Auto, atic Sprinkler System
Location i
No. of Sprinklers .1111111111
Basis of Design
1. DENSITY , GPM730.�T•
111111121
2. DESIGNED AREA OF DISCHARGE
System Demand
1. GPM DISCHARGE
2 RESIDUAL PRESSURE AT THE IOW
BASE OF THE RISER
--..0011410111
References
Drawing Sheet 1 —Warehouse, Hobby King (sic), 14140 SW 72"a Ave, Tigard, OR, 05/08/2020,
Northwest Handling Systems, Portland, Oregon
Email dated 5/8/2020 1:21 PM, Subject: HobbyKing, to David Gessert of Fire Protection
Consulting, Portland, Oregon, from Dustin Nichols of HobbyKing, Tigard, Oregon
Oregon Fire Code, 2019 Edition, International Code Council, Country Club Hills, Illinois
Oregon Structural Specialty Code, 2019 Edition, International Code Council, Country Club Hills,
Illinois
National Fire Protection Association 13, Standard for the Installation of Sprinkler Systems, 2016
Edition, National Fire Protection Association, Quincy, Massachusetts
End of Report