HomeMy WebLinkAboutEngineeringTRC wide Engineering, Inc.
1011 South ouch 25 25'" Street, Suite 211
Fort Pierce, FL 34947-4748
Phone: (772)466-3773 F: (772)468-3700 WORLDWIDE ENGINEERING
www.treww.com CA No. 27322
November 6, 2012 ST. LUCIE COUKW,
Mr. Robert Ettswold PLAN REVIEW
St. Lucie County Central Services p�
2300 Virginia Ave.
Ft. Pierce, FI 34982 ELDG:
DATE:
RE: Mets Minor League Clubhouse RTU Replacement ELEC:
650 NW Peacock Blvd., Port St. Lucie, FL DATE:
Dear Mr. Ettswold: PLUMB:DATE:
The proposed work involves the replacement of 3 existing roof top air conditioning 11niffv�.''r//
above reference building. The units are located on the roof at the west side of the I ruim1 FRQ�~6�
weights and sizes of the new units are listed in the table below, but in all cases the iew tit rc� arm
smaller in size than the existing units. The weights of the existing units are not known. It is our
understanding that the units to be replaced are original to an addition to the minor league
clubhouse complex that was completed in early 2004. We have been retained by St. Lucie County
to determine if the existing roof structure has adequate capacity to support the loads from the
_replacement units. The weights and sizes of the new units are listed in the table below.
We were not provided with the existing design drawings but we were able to measure the existing
roof structure. In general the roof framing consists of 24" deep steel barjoists spanning
approximately 38 feet between load bearing masonry walls and spaced 48" center to center. There
is an existing steel angle frame spanning between the existing steel joists and supporting the roof
top cur. The new units will be supported on the existing roof top curbs by means of a curb adaptor.
Wind loading on the units is based on the Florida Building Code 2010 and ASCE 7-10. Design
ultimate wind speed 160 MPH, 3 -second gust, building risk category II and exposure category`C'.
The attachment of the curb adaptor to the existing curb and the new curb to the curb adaptor shall
be with #12 TEK screws 4" from unit corners and at 16" etc maximum along all 4 sides.
Based on our investigation and analysis the existing roof framing has adequate capacity to support
the loads from the new roof top mechanical equipment, and the curbs attached as directed above
provide the required resistance to the design wind loading.
Sincerely:
TRC orldwide Engineering, Inc.
Jeffrey D. McGee, P.E. 45944
Principal/Division Manager
S E R V I C E I N N 0 V A T I O N Q U A L I T Y
I
Length
Width
I
Height Weight f
Mark
Tag
I Model
(In)
(In)
(In46.875 ) I (Lbs)
Al
10 ton
TSC120F3EOA 1
88.625
53.25
960
A2
4 ton
TSC048E3EOA 1
69.875
44.25
36.25 511
A3
6 ton
TSC072E3EOA 1
88.625
53.25
40.875 720
Wind loading on the units is based on the Florida Building Code 2010 and ASCE 7-10. Design
ultimate wind speed 160 MPH, 3 -second gust, building risk category II and exposure category`C'.
The attachment of the curb adaptor to the existing curb and the new curb to the curb adaptor shall
be with #12 TEK screws 4" from unit corners and at 16" etc maximum along all 4 sides.
Based on our investigation and analysis the existing roof framing has adequate capacity to support
the loads from the new roof top mechanical equipment, and the curbs attached as directed above
provide the required resistance to the design wind loading.
Sincerely:
TRC orldwide Engineering, Inc.
Jeffrey D. McGee, P.E. 45944
Principal/Division Manager
S E R V I C E I N N 0 V A T I O N Q U A L I T Y
TRC Worldwide Engineering, Inc.
2011 South 25" Street, Suite 211
Fort Pierce, FL 34947.4748
Phone: (770466-3773 F. (772)468-3700
www.trcww.com CA No. 27322
November 6, 2012
Mr. Robert Ettswold
St. Lucie County Central Services
2300 Virginia Ave,
Ft. Pierce, 17134982
RE: Mets Minor League Clubhouse RTU Replacement
650 NW Peacock Blvd., Port St. Lucie, FL
Dear Mr. Ettswold:
�i
WORLDWIDE ENGINEERING
The proposed work involves the replacement of 3 existing roof top air conditioning units at the
above reference building. The units are located on the roof at the west side of the building. The
weights and sizes of the new units are listed in the table below, but in all cases the new units are
smaller in size than the existing units. The weights of the existing units are not known, it is our
understanding that the units to be replaced are original to an addition to the minor league
clubhouse complex that was completed in early 2004. We have been retained by St. Lucie County
to determine if the existing roof structure has adequate capacity to support the loads from the
replacement units. The weights and sizes of the new units are listed in the table below.
We were not provided with the existing design drawings but we were able to measure the existing
roof structure. In general the roof framing consists of 24" deep steel bar joists spanning
approximately 38 feet between load bearing masonry walls and spaced 48" center to center_ There
is an existing steel angle frame spanning between the existing steel joists and supporting the roof
top cur. The new units will be supported on the existing roof top curbs by means of a curb adaptor.
Wind loading on the units is based on the Florida Building Code 2010 and ASCE 7-10. Design
ultimate wind speed 160 MPH, 3 -second gust, building risk category it and exposure category `C'.
The attachment of the curb adaptor to the existing curb and the new curb to the curb adaptor shall
be with 912 TEK screws 4" from unit corners and at 16" clo maximum along all 4 sides.
Based on our Investigation and analysis the existing roof framing has adequate capacity to support
the loads from the new roof top mechanical equipment, and the curbs attached as directed above
provide the required resistance to the design wind loading.
Sincerely:
7TAo,1,1dwide Engin, Inc.
Jeffrey D. c ee, P.E. 45944
Principal/Division Manager
S E R V I C E I N N 4 V A T 2 0 N Q U A L I T Y
82.LE:a6pd 81029b:01 CH 8 9NI1H3H SEWIN9:w0u
d B2:£S £T02-80-NtJf
I
Length
I
Width
Height I
(
Weight
Mark
Tag
Model
(In)
(In)
(In)
(Lbs)
I Al
110 ton I
TSC120MOA
1 88.625 1
53.25
1 46.875 1
96o j
f A2
4 ton
I
TSC04BE3EOA
69.8751
44.25
36,25
511 i
1 A3
i 6 ton
T80072E3EOA
88,625 I
53.25 1
40.875-1
7201
Wind loading on the units is based on the Florida Building Code 2010 and ASCE 7-10. Design
ultimate wind speed 160 MPH, 3 -second gust, building risk category it and exposure category `C'.
The attachment of the curb adaptor to the existing curb and the new curb to the curb adaptor shall
be with 912 TEK screws 4" from unit corners and at 16" clo maximum along all 4 sides.
Based on our Investigation and analysis the existing roof framing has adequate capacity to support
the loads from the new roof top mechanical equipment, and the curbs attached as directed above
provide the required resistance to the design wind loading.
Sincerely:
7TAo,1,1dwide Engin, Inc.
Jeffrey D. c ee, P.E. 45944
Principal/Division Manager
S E R V I C E I N N 4 V A T 2 0 N Q U A L I T Y
82.LE:a6pd 81029b:01 CH 8 9NI1H3H SEWIN9:w0u
d B2:£S £T02-80-NtJf