HomeMy WebLinkAboutB15-0420 Structural Analysis report �"�► � ENT � RLI �IE
16360 Table Mountain Pkwy, Golden, CO 80403 / 303.993.3293
January 8, 2015
Ms. Danielle Huxtable
Sprint
RE: Sprint 2.5 Project
DN13XC415
"US WEST TOWER"
Antenna Mount Analysis
Dear Ms. Huxtable:
Centerline Solutions performed a structural review of the existing antenna mount at the
above referenced site. The existing mounts are not adequate to support the new spint
antennas. New mounts must be installed to safely support the new Sprint 2.5 Antennas
and RRU's.
All new antennas and equipment shall be placed on the building as shown in the
drawings issued by this office.
Please contact us with any questions.
Sincerely, �
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Fss��NAI ENG\���,
Ryan Guerrero, PE
ATT: Calculations
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STRUCTURAL ANl-�LYSIS REPC?RT
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Prepared for Btvesfream
1JS West Comm Tower
DN 13XC415
SS� # CO-0083-B-Mod
June 5, 2n 15 � � � 5 a � �� ;;��
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SSC Jnc. •g�
9t�(7Q W ]Oq�h St, Svite 3C�0, Overland Park, KS 662(0
Pl�: (913J 438-770Q Fax: (913) 438-777?
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Sprint
DN13XC415, US West Comrrc Tower
SSC# CO-0038-B-Mod, Page 2
TABLE OF CONTENTS
General Platform Information.. . ... ... ... ... ... ... .. . . ..... .. . ... . .. ..... 3
Introduction .. . . ..... ... ...... ...... ... ...... .... .. ... ..... ...... . ..... ...... 4
Sourceof Data.. .. ... ..... .... ...... ... .......... . . ... ... ... ...... ... ... . . .. 4
Equipment Loading...... . ... ... ... ... ... .. . ..... . ... ... ... . . .... .. .... .... 4
Platform Analysis..... .... .... ... ...... ........ .. .... ..... .. ...... ... ........ 5
Conclusion and Recommendations... ... . ..... ... ... ... .. . ... ........... 5
General Conditions . ..... . .. . ... ..... ....... ..... . .. ............. Appendix A j
Platform Modification Details ...... ..... . ..... . ............. . Appendix B �
Structural Calculations and Diagrams ....... .. ..... ......... Appendix C
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DNI3XC4I5, US West Comnz Tower
SSC# CO-0038-B-Mod, Page 3
GENERAL PLATFORM INFORMATION
Date: June 5, 2015
Site Name: US West Comm Tower
Site Location: Vail, Eagle County, CO
Proposed Carrier: Sprint
Location Code: DN 13XC415
Platform Manufacturer: Unkown
Design Standard: IBC 2012/ASCE 7-10
Risk Category: I
Structural Classification: II
Ultimate Wind Speed: l 15 mph
Converted Ult. Wind Speed: 90 mph
Snow Loading: 140 psf
Exposure Category: C
Topographic Category: 1
SSC Project Number: CO-0038-B-Mod
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Sprint
DN13XC415, US West Cofnm Tower
SSC#CO-0038-B-Mod, Page 4
Introduction
Seleetive Site Consultants, Inc. (SSC) has performed a structural analysis for the referenced
existing platform. The purpose of this analysis is to determine the overall stability and structural
adequacy of the existing structure to accommodate the proposed changed condition in
accardance with IBC 2012/ASCE 7-10.
Source of Data
Our analysis is based on information provided in the table below.
Document Remarks Date
ShelCer Mapping Report by
Platform Geometry 04/07/2015
Hi rhtower SoluCions
Existing Loading Re��. 0 Construction Drawings by 12/19/2014
Centerline Solutions
Proposed Loading CenturyLink Sp�ice/Power Ol/OS/2015
A plication
Equipment Loading
Our understanding of the equipment loading conditions is sh<�wn below.
Equip Status Qty Equipment Dimensions
(WxD, Wt)
Existing (Sprint) 1 Battery Backup Unit 27.5" x 30.5", 2550#
EYisting(Sprint) 1 NV Multimodal Base Station 27.5" x 30.5", 700#
Existing (Nextel) 1 Ladder Rack 112.5" x 18", 1407# i
Proposed (Sprint) 1 2.5 Expansion Cabinet 27.6" x 33.5", 1750#
Note:
1. Existing l�dder rack dimensions and weight assumed.
SSC, INC.
1 i
Sprint
DN13XC415, IIS West Comm Tower
SSC# CO-0038-B-Mod, Page 5
Platform Analysis
All wide flange shapes �re assumed to be A572 grade 50 steel, all round hollow sections are
assumed to be� A53 grade B steel, all other steel is assumed to be A36 grade 36 steel, and all bolts
are assumed to be gracie A325.
A structural analysis was perfarmed utiliaing RISA 12.0 software. The calculations were
performed in accord�nce with IBC 2012/ASCE 7-10. See Appendix C for structural calculations.
The an�ilysis of the platform with the existing and proposed loads indicates no overstressing in
the modified pipe columns loc�ted on the west side of the structure, also the replaced suppart of
the walkway in the southwest corner is adequate.
Conclusion and Recommendations
The conclusion of the following structur�l analysis is that the rrcodified eq�iipment platform will
be adequate for the proposed Sprint equipment installation provided the following modific�ti�ns
��re implemented:
• The addition of bracing to the pipe columns. See Appendix B for details.
• Bolting the existing W 10 with 4" wide flanges to the existing W 10 with 8" wide
flanges. See Appendix B for details.
• The addition af stiffeners ro the existing W 10 with 8" wide tlanges. See
Appendix B far details.
• Replace the existing porch support in the southwest carner witl� a full height pipe
column. See Appendix B for details.
The foundation and shelter framing were not analyzed; therefore, no conclusion of the structural
capacity and integrity of the foundation and shelter framing can be made without further
investigation.
If the proposed loading conditions are different or ch�inge from those analyzed, this report shall
be deemed obsolete and further investigation will be req��ired.
If you have any questions or comments, please do not hesitate to call.
Sincerely,
�z�, i��.�, �.?
Drew Hayes, E.I.
SSC, INC.
� f
APPENDIX A
General Conditions
Please note that SSC malces no warranties, expressed or implied in connection with this report
and disclaims any liabiliry arising from original design, material, fabrication and erection
deficiencies for this platform.
It is the responsibility of the Client to ensure that information provided by the Client to SSC and
used in this analysis is correct This information is �ssumed correct unless notified otherwise by
the Client.
T�his analysis assumes the platform steel is in its orig�inal state wiCh no deterioration due to
improper erection procedures or field modificatians �nd does not consider fabrication qaality.
The recommendations, conclusions, and opinions contained in this report pertain only to the
analysis of the platform structure and the load carrying capacity of its members.
This analysis assumes any suggested modifications are installed as recommended and is not
intended to address temporary conditions of the platform as modificadons are being performed.
It is strangly recommended that the Installer of any platform modification thoroughly assess
installation procedures �nd how temporary conditions present ��hile modifications are being
performed influence platform members. Installer is responsible for sequence of operation and
any required temporary bracing ar sCrength�ning of platform during modificatic�n operations.
SSC is not responsible for the conclusions, opinion, or recommend�Cions made by others based
on the information we supply.
ssc, rNe.
# �
APPENDIX B
Platform Modification Details
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From: Albert Schmidt
To: Derek Blake:street?ndsons(alaol.com
Cc: D�• $p-��m-n h�-son M'ireless•rich(alm�son��ireless com•"Erika S�ienson.Mason Wireless"
Subject: RE:MOD WEST COMM
Date: Thursday,September 03,2015 1:38:37 PM
Attachments: imaaeOQl.ioo
MARK UP Paaes from Bluestream Vail CO �SC#CO-0083-B-Mod Platform.odf
The alternate weld instead of the bo�ts is acceptable. The weld size should be 3/16 Fillet x 2" in
center of beam flange.
Thanks,
Albert Schmidt P.E. � SSC � Director Tower Structures Group
9900 West 109th Street, Suite 300
Overland Park, KS 66210
Corporate Woods Building#70
Office: 913.438.7700
Fa�c: 913.438.7777
Cel I: 816.868.9652
w�nnr ssc us.com
From: Derek Blake [mailto:derek@masonwireless.com]
Sent: Thursday, September 03, 2015 2:04 PM
To:Albert Schmidt; streetandsons@aol.com
Cc: Duke Spackman, Mason Wireless; rich@masonwireless.com; 'Erika Swenson, Mason Wireless'
Subject: MOD WEST COMM
Gentlemen,
After phone conversations with both parties, engineer and weld fabricator, please review attached
doc and confirm new application as discussed.
Reply all please.
Thank you.
r
Derek Blake
720.301.5734 � � ,��
derek�mason wrre�ess.com
�I rL'.�� tltlpClS Lt+d
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AS�B[�ILT
Mason Wireless Solutions
240 Wyandot Street ��,,.�t�� ,���
Denver, CO 80223
303.777.7075 / Fax:303.777.5505
wta�w�masonwire/ess.com
This message is a confidentiaf and privileged cor�munication and is intended fior the recipient{s) only.
Should you reeeive this message in error, piease contact me immediately as indicated above and deiete
#he message. Any other use of this message is prohibited.
. •
APPENDIX C
Structural Calculations and Diagrams
SSC, INC.
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