Report (18) D U L L O L S 0 N WEE K E S ARCHITECTURE 4 INTERIORS + PLANNING
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DATE: March 4, 2005
TO: Dan Nelson City of Tigard
FROM: John Westfall
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PROJECT: Tigard High SchOel
COPY: Craig Marcus Cornerstone
RE: Fire sprinkler pipe chase
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Dan,
I have visited the site and have found that the installation of the fire line and the wall around it on
the west face of the new infill building has not been installed per our drawings. Our drawings show
the outside wall forming a chase around the pipe with the exterior wall being fully insulated with R-
19 batt insulation. As you noted, the contractor had installed Densglas exterior wall sheathing on the
interior wall at this location, prior to installing the chase. Robinson will be removing areas of this
sheathing which, in turn, will allow the passive transference of interior air to heat this space. This
solution meets the goal of isolating the pipe from the outside environment and will allow it to be
surrounded with an interior source of heating /cooling, thus bringing it to code. I appreciate your
bringing this to everyone's attention.
Submitted by,
Dull Olson Weekes Architects IC � x_
John P. Westfall
Project Manager
319 SW WASHINGTON ST a 200 PORTLAND, OR 97204
MEMORANDUM 503 226 6950 503 273 9192 I u u ,r.rluu u.ro,n