HomeMy WebLinkAboutCBPR-6-11-11217 Mech Engineers Repotr.tif y
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GEORGE O. BROWN & ASSOCIATES, PLLC P.O. BOX 3423
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CONSULTING ENGINE�RS HICKORY, NC 28603
OFFICE (828) 3244002
FAX (828) 3244012
January 12, 2011
William Jenkins
Hickory, N.C. 28601
Attn: William Jenkins
Subject: WILLIAM JENKINS BUILDING
Hickory, N.C.
Dear Mr. Jenkins:
This letter is in reference to an existing 23,000 sq. ft. building to be used as an Event Center. The following analysis is based on
1,000 sq. ft. for the stage and 15,900 sq. ft. spectator space and a total of 1,300 occupants. The remaining 7,000 sq. ft. will be used
as office, toilets, lockers, concess ions, etc. and was not included in this analysis.
According to the N.C. State Plumbing Code, Building Classification A4: 650 male occupants = nine (9) water closets and four (4)
lavatories. Instead of the nine (9) water closets, five (5) urinals may be used with the remaining water closets being four (4). 650
female occupants = sixteen (16) water closets and four (4) lavatories. In addition, two (2) drinking fountains are required.
The outside air requirement is hoed a total of thirteen hundred (1,300) people x 15 cfm/person = 19,500 cfm of outside air to be
delivered to the space continuously during occupied periods.
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The estimated total cooling load is estimated to be one hundred twenty (120) tons. Energy recovery ventilators will be required by
the N.C. State Energy Code, thereby reducing the net cooling load to around eighty (80) tons. There are presently six (6) nominal
10 -ton roof - mounted heating & cooling units for a total of sixty (60) tons existing capacity.
The estimated cost of the new plumbing system is approximately $30,000. The new heating and air conditioning system cost based
on eighty (80) tons — sixty (60) tons = twenty (20) tons additional capacity + energy recovery ventilator(s) to supply nineteen
thousand five hundred (19,500) cf n outside air is in the neighborhood of $130,000.
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If you have any questions, or need further clarification, please let us know.
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Sincerely, Ra C
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GEORGE O. BROWN & ASSOCIATES, PLLC P.O.BOX3423
CONSULTING ENGINEERS
HICKORY, N.C. 28603
OFFICE (828) 324 -4002
FAX (828) 324 -40
June 30, 2011
Catawba County Plan Review
76 North Center St.
Hickory, N.C. 28601
Attn: Bill Rogers
Plan Reviewer
Subj: William Jenkins Building
Hickory, N.C.
Dear Bill:
The building cooling load, based on 582 people at 15 cfin per person (8,730 cfin), is approximately 73.1
tons. At the present time, there are six (6) nominal 10 -ton rooftop gaspacks serving the existing building,
for a total existing capacity of 60 tons. Approximately 1,455 cfm would have to be provided through each
of the six (6) gaspacks, or 36% outside air, which is the upper limit of the outside air these systems could
handle. My professional opinion is that the existing rooftop gaspacks have adequate capacity for the
anticipated occupancy of 582 people. However, one hundred percent outside air economizers with
enthalpy control and CO2 sensors would need to be added to each of the gaspacks to provide the required
amount of outside air.
If ou have any y questions or need further assistance, please let us know.
Sincerely,
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6/30/11
GEORGE O. BROWN, P.E.
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GEORGE O. BROWN & ASSOCIATES. PL
CONSULTING ENGINEERS LC P.O. BOX 3423
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HICKORY, N.C. 28603
OFFICE (828) 324 -4002
FAX (828) 324 -4012
June 30, 2011
Catawba County Plan Review
76 North Center St.
Hickory, N.C. 28601
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Attn: Bill Rogers
Plan Reviewer
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' Subj: William Jenkins Building
Hickory, N.C.
Dear Bill:
The building cooling load, based on 582 people at 15 cfm per person (8,730 cfin , is approximately tons. At the present time, there are six (6) nominal 10 -ton rooftop PP
oximately 73.1
' for a total existing capacity of 60 tons. My understanding is, that he roofto serving the existing building,
outside air economizers. Approximately 1,455 cfin outside air would have o be are p rovided th e quipped with
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the six (6) gaspacks, or 36% outside air, which is the u r rough each of
handle. My professional opinion is that the existing rooftop limit of the outside air these systems could
anticipated occupancy of 582 people. My recommendation is to add CO2 sensors to each r oftor the
to track the outside air in direct proportion to the amount of people actually in the space at any given ti
This would save energy and energy cost to the Owner.
If you have any questions or need further assistance, please let us know.
Sincerely,
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6/30/11
GEORGE O. BROWN, P.E.
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