HomeMy WebLinkAbout4380 ZIEGLER RD - CORRESPONDENCE - 4/2/20123
April 2, 2012
Mr. Mike Gebo, Chief Building Official
City of Fort Collins, CO
Building Services
281 North College Avenue
Ft. Collins, CO 80522-0580
CH2M HILL
2020 SW Fourth Ave.
Third Floor
Portland, Oregon, USA
97201
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Subject: Avago Technologies, Inc.
4380 Ziegler Road, Fort Collins, CO 80525i�-
New Solvent Storage Building
Request for Variance to City of Fort Collins Commercial Building Code Green Amendments
Dear Mr. Gebo,
CH2M HILL is preparing construction documents for a new Solvent Storage Building for Avago
Technologies, Inc (Avago). The new Solvent Building will be a pre-engineered metal building constructed
on the existing foundations east of Building 4 on the Avago campus.
On behalf of Avago Technologies, CH2M HILL requests a variance to Items 5, 7, and 15 required by the
city of Fort Collins Commercial Building Code Green Amendments (Green Amendments).
CH2M HILL submits the following for your consideration.
Item 5 - Building Envelope; Air Barrier: Requires continuous air barrier system with air tightness testing
per city of Fort Collins standard. Leakage must not exceed 0.25 cfm/sf at 75 Pa (0.3 inches WC).
The Green Amendments require 'Building Testing the completed building and documenting that the air
leakage rate of the building thermal envelope does not exceed 0.25 cfm/sf under a pressure differential
of 0.3 in. water (1.57 Ib/sf) (0.02 L/s-m2 under a pressure differential of 75 Pa) in accordance with
ASTM E779 or an equivalent approved method."
CH2M HILL requests a variance to meet the requirement for continuous air barrier and air leakage
testing.
Justification:
• The Solvent Building is an H2/H3 Occupancy. The building code requires the building
mechanical system exhaust the building at a nominal 6 air changes per hour or 14,000 cfm
(2.25 cfm/square foot of building area) to prevent the accumulation of flammable solvent
fumes.