Correspondence '..T1
•
CA "9
April 15, 2011 `
r,
y
Gail Oldham James G. Pierson, Inc.
Evergreen Pacific, Inc. 94:"
9117 SW Burnham St.
Tigard, Oregon 97223
Aman Residence
14988 SW 109 Ave. - Tigard
Dry Rot Replacement
Dear Mr Oldham:
I have reviewed the framing sketches and photos of the dry rot that was found in a 4x 10
beam and some decking at the residence located at 14988 SW 109 Ave. in Tigard.
In the space between two units, there exists a pair of 4x10 beams (one per each unit) with
a small gap between that hold up the 2x8 decking. These 4x10 beams are supported by
posts at 8 ft o/c but the beams have also been infilled with a 2x4 stud wall framing that
sits on the continuous concrete footing. The 2x4 wall framing supports gypsum boards
that create a firewall between units.
It appears that the 4x10 beams were designed and used structurally before it was
determined that at the property line, this space needed to have the fire wall between units.
As such, this area could have been framed with 2x4 stud walls full height and skipped the
4x10 beams at that location.
There are no structural issues with removing a partial section of the continuously
supported 4x 10 beam containing the dry rot and replacing it with a new section of 4x 10
(total length between 4 and 5 ft). The cut ends of the 4x10 beams (each side of the
splice) need to have 2x4 studs within 8" of the splice and every 24" as required for the
gypsum board support. There is no reason to add a steel strap across the splice of the
4x 10 beams as they are not part of the lateral system.
The 2nd part of the dry rot replacement is the 2x car decking. To not have to replace the
entire length of boards due to rot and just the ends, it is acceptable, as you have shown in
your sketches, to run a pair of 4x6 joists under the decking and then add a 4x6 header
between them to create bearing for the new joint created by removing the damaged
sections.
CITY OF TIGARD
Approved [.�]
Conditionally Approved [ ]
OFFICE COPY See Letter to: Follow [
Attached [
Permit Number: ft -- r /- 0_99 C
Adcl•ess: 1 z l � �Ss4s - 54 4) /09 Ajt
• 13 Y: A
Consulting Structural Engineers
' Date: t / - / 5 /
610 S.W. Alder Street, Suite 918, Portland, Oregon 97205 Tel: (503) 226 -1286 Fax: (503) 226 -3130
If there are any questions on my observations or recommendations, please feel free to call
and discuss.
Sincerely, DUCT
0.1)F RRO"
� ��
*G‘ N
1834 p
Peder Golberg, PE, SE OREGON co i, f
Principal °r Ch l9 ti
R. GO'
EXPIRE'= 6-30- I I
Consulting Structural Engineers
610 S.W. Alder Street. Suite 918, Portland, Oregon 97205 Tel. (503) 226 -1286 Fax: (503) 226 -3130
EVERGREEN
PACIFIC, I N+.
}� GENERAL CONTACTORS
9117 SW Burnham St.
Tigard, OR 97223
503 - 624 -1337 (Office)
CCB #41521
April 11, 2011
Robert Harp
Pinnell- Busch, Inc.
6420 SW Macadam Ave., Suite 330
Portland, OR 97239
RE: Aman Residence
14988 SW 109 Ave
Portland, OR 97224
Evergreen Pacific Inc. proposes to provide replacement of a beam, supporting structure
and sub - floor, damaged by water infiltration, for the total cost of $3,059.00.
Scope
1. Cut out a 4' — 5' section of damaged 4x10 beam and replace with new matching
beam.
2. Replace the cripple studs and plates below the beam (match existing).
3. Remove and replace the firewall gypsum as required to replace the beam and
cripple studs.
4. Remove and replace the 2x8 car - decking sub -floor where water damaged
(approximately six boards wide x 6' long).
5. Proposal includes an Allowance of $350.00 for structural engineering fees
regarding the beam.
6. Proposal includes an Allowance of $150.00 for building permit fees.
7. Proposal includes disposal of construction debris.
8. Work to be performed during the contractor's normal business hours.
Please give me a call with any questions.
oLdhawc
503 - 519 -8688 (cell)