Plans ;out- 60 3d',
44mmi' W
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CITY OF TIGARD
OREGON
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December 12, 2001
Michael M. Platt
ASK4 Engineering, Inc.
39084 Proctor Blvd., Suite C
Sandy, OR 97055
RE: Bonita Villa Apartment Fire Repair
/ - 76 , ---
PROJECT INFORMATION
Address: 580 Bonita Road Number of Stories: 2
Permit Number: BUP2001 -00389 Sprinklered: No
Occupancy Group: R -1 Fire Alarm: Required
Type of Construction: V One -Hour Rated Corridors: Yes
Floor Area:
The City of Tigard Building_ Division has reviewed the submitted building plans for the
above referenced address in accordance with the Oregon Structural Specialty Code
(OSSC), 1998 edition. The following information is required prior to issuance of the
permit.
General Review Comments
1. ASK4 Engineering has provided the City of Tigard with a lateral analysis of the
affected portions of the damaged building. We are assuming that they will be the
engineers of record for the rest of the design of the project including the fire & life
safety portions. If this assumption is incorrect, please let us know whom the architect
or engineer of record will be in accordance with OSSC 106.3.2.
2. This building is required to have an automatic and manual fire alarm. If this is going
to be by deferred submittal it shall be identified as such on the plans. Deferred
submittals shall be reviewed by, the engineer or architect of record prior to submittal
to the City of Tigard to ensure that the plans are in general conformance with the
design of the building. OSSC 106.3.4.2.
13125 SW Hall Blvd., Tigard, OR 97223 (503) 639 -4171 TDD (503) 684 -2772
3. Hard -wired smoke detectors are being installed throughout the entire building in -lieu
of sprinkling the three affected units. We have a letter on file requesting this
alternate method of construction. Smoke detectors shall be located in each separate
bedroom and in the hall adjacent to the bedrooms in all apartment units in this
building. The detectors shall be equipped with a battery backup in the event of a
power failure and the detector shall emit a signal when the batteries are low. Wiring
shall be permanent and without a disconnecting switch other than those required for
over current protection. OSSC 310.9.1.3 and 310.9.1.4.
Fire & Life Safety Review Comments
1. This building is required to be of one -hour construction throughout. Please submit
the approved listings of the fire assemblies that will be used for the walls,
floor /ceilings and roof /ceilings for review.
2. The common exit system for the units shall be constructed as required for a one -
hour fire - resistive corridor. The doors of the lower two floors shall be self - closing fire -
assemblies having a three - fourths -hour fire - protection rating. The top story doors
may be listed and labeled doors having a fire - protection rating of 20- minutes. All of
these doors shall bear an `S' label. OSSC 1003.3.3.10 and 1004.3.4.3.2.1. Please
reflect this on the plans.
3. The stairways shall be constructed with a maximum rise of 7 inches and a. minimum
run of 11 inches and shall have handrails on both sides. OSSC 1003.3.3.3 and
1003.3.3.6.
4. The laundry room shall be completely separated from the rest of the building by a
one -hour fire- resistive occupancy separation. This includes walls and floor /ceilings.
Openings into this room shall have a fire - protection rating of not Tess than one -hour
and be self - closing. withOSSC 310.2.2 and 302.3. Please detail this on the plans.
5. Any other penetrations of this laundry room occupancy separation such as, pipes
and conduits shall be protected by penetration firestops in accordance with OSSC
Section 709.6 through 710.3. Dryer exhaust ducts shall be enclosed within a one -
hour -rated shaft.
6. There shall be a method of firestopping the wiring above the electrical panels in the
laundry room to maintain the required one -hour fire - resistive construction. Please
show how this will be accomplished.
7. Electrical boxes and other openings on opposite sides of the dwelling unit separation
walls and the walls of the exterior exit stairways shall be separated horizontally a
minimum of 24 inches. OSSC 709.7.
8. The entire building shall be provided with attic draft stops above and in line with the
dwelling unit separation walls. Draftstopping materials shall not be less than '/2 -
inch gypsum board, 3 /8 - inch wood structural panel, 3/8 - inch Type M -2 particle
board or other approved materials adequately supported. Self- closing doors shall
protect any access openings in these draft stops with automatic latches constructed
as required for the partitions. OSSC 708.3.1.2.1 and 708.3.1.3.
9. Attic access doors in the one -hour ceilings shall be a minimum listed and labeled
one -hour access door approved for horizontal installation. OSSC 710.1.
10. The gas vent on the existing hot water tank shall be enclosed in a one -hour fire -
resistive shaft from the room it is located to its termination point outside the building.
Please provide details of the shaft construction for review. OSSC Table 6 -A.
11.AIl bedrooms shall be provided with at least one operable window that provides a
clear opening height of 22 inches and a width of 20 inches. The overall size of the
opening shall be not Tess than 5.7 square feet and shall be openable from the inside
without the use of a separate tool. Maximum sill height from the finished floor shall
not exceed 44 inches OSSC 310.4.
12. Bathroom exhaust ducts penetrating the fire - resistive floor /ceiling and roof /ceiling
assemblies shall be provided with fire dampers listed and labeled for a fire - protection
rating of not less than 1 -hour of enclosed in a shaft. Other alternates may be
approved based on maintaining the fire - resistive membrane. OSSC 710.
13. Walls and floors separating dwelling units and the stairwells shall be provided with
sound transmission class (STC) insulation rating of 50. OSSC 1206.
Structural Review Comments
1. The plans indicate on Sheet S3 that the floor sheathing is part of the resisting
diaphragm with a reference note on Detail SP1 /S3 stating, "Floor sheathing (with
panel edge nailing per typical notes). The floor nailing condition is unknown since it
is covered in gyperete. Please clarify how the floor diaphragm will be accounted for
in the design.
2. Please detail how the two upper story shearwall forces will be transferred to the
foundation. Most of these walls are shown without any diaphragm connections.
3. During a site visit on December 10, 2001, the required holdowns were not installed
on the basement north walls. These are detailed on the plans and will be required to
be installed.
Energy Conservation Review Comments
1. The insulation in the exterior walls may be provided with R -15 insulation but the attic
must have a minimum of R -49 insulation installed. This is a trade off using Path 8 of
Table 13 -A of the OSSCC.
Chapter 11, Accessibility Review Comments
1. Alterations to existing multi- family dwelling units are exempt from the accessibility
requirements of OSSC Chapter 11. No upgrades for accessibility will be required for
this project. OSSC 1112.1 and 113.1.
Please submit four (4) revised sets of drawings to the City of Tigard Building Division
addressing the comments in this letter. Please include the permit number and address
when making this submittal.
If you have any questions regarding this review, please contact me at (503) 369 -4171 '
ext. 311.
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Sincerely,
Gary Lampella
Building Official
c. Stefan Boros
Hap Watkins, Supervising Inspector
Jim Hendryx, Director of Community Development
Eric McMullen, Deputy Fire Marshal, TVF &R
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Jeff Grunewald, Fire Marshal, TVF &R
Bldg. File