Correspondence (680) / 1
INTERFACE ENGINEERING INC. Consulting Engineers
6542 S.E. Lake Road, Milwaukie, Oregon 97222
(503) 659 -6394 FAX (503) 659 -9029
May 7, 1998
Carol Gardner
Gardner Energy Management Services
P.O. Box 12549
Portland, OR 97212
RE: TRIANGLE CORPORATE PARK
Project No. 98088
Dear Carol:
The following is in response to the plans review comments for Triangle Corporate Park Building III.
Responses
1.1 The overall U- factor for the spandrel glass had been corrected and incorporated into code
comp. Code comp has been rerun.
The wall type with precast conc. has been entered into code comp. Code comp has been
rerun.
1.2 The triple pane glass was incorrect for the description; aluminum double pane glass is the
correct description and shown in code comp. The glazing assembly components and the
center of glass U -value and shading coefficient will be included in the specification Section
08800. The center of glass U -value shall be lower than the U -value used in the simplified
trade -off approach to pass code.
1.3 The slab perimeter length has been entered and the insulation R -value was entered as R =0
into code comp. Code comp has been rerun.
1.4 The energy efficiency rating for the AC -units includes all motors, fans, accessories in the
overall efficiency rating. See enclosed Form 4A. Form 4J has been filled out and included.
1.5 The exception to 1313.3.4.2, exception 2 applies here. The units are unitary. The energy
used by the fan is considered in the efficiency ratings of Table 13-land Table 13 -J of U.B.C.
Form 4A has been updated.
1.6 The AC -units are packaged, not built -up as section 1313.3.5 states. 1313.3.5 does not
apply according to our interpretation of the code.
R: \98088 \COMM\5 -7 -98. LTR
Other Offices: Salem, Oregon (503) 364 -5354 Kirkland, Washington (206) 820 -1542
r
1
11
Carol Gardner
May 7, 1998
Page 2
I
1.7 The duct insulation requirements are specified in specification Section 15250, Article 3.1,
paragraph A. It specifies the insulation has to meet state energy code. The R -value is -
stated in Section 15250, Article 3.1, paragraph D.
1.8 The last two pages of Form 5B were not included originally. The forms are included now.
See enclosed sheets.
I have included updated code comp forms (envelope and lighting) and mechanical code forms. If
you have any questions please call, thanks.
Sincerely,
William B. Grabo, E.I.T.
Mechanical Designer
WBG:cms
Enclosures
R: \98088 \COMM\5 -7 -98. LTR
r
,
,
,
,
\
\ \ _