The URL can be used to link to this page

Home My WebLink About2012-03-20 Planning Board Supplemental Materials (134) Hudson Design Group= February 12, 2012 Mr. Greg Knight MetroPCS 285 Billerica Road Chelmsford, MA 01824 RE: Structural Assessment Letter Site Number: BOS0380C Site Name:Trinitarian Congregational Church 70 Elm St. North Andover, MA Dear Mr. Knight, Hudson Design Group LLC (HDG) has been authorized by MetroPCS to provide a structural Assessment of the existing site located at Trinitarian Congregational Church, 70 Elm St., North Andover, MA. Based on our evaluation,we have determined that the existing site is capable of supporting the MetroPCS antennas and equipment. This determination was based on the following information provided: 1. Structural analysis provided by Hudson Design Group, LLC, dated 10-07-08. If you have any questions about this project, please contact our office. Respectfully Submitted, HUDS DESI N GROUP, LLC � jµof4(4�c 9 o� DANIEL P. yG HAMM tL N Daniel P H m P No.a0720 Preside t 9ForST��Ga Hudson Design Group, LLC. fWVAL 1600 Osgood Street Building 20 North Suite 2-101 p:978.557.5553 f:978.336.5586 a: 1600 Osgood Street, Building 20 North,Suite 2-101, N.Andover,MA 01845 p:413.588.8139 f:413.517.0590 a:116 Pleasant Street,Ste 302, Easthampton,MA 01027 STRUCTURAL ANALYSIS REPORT For BOS0380C 70 Elm Street North Andover 70 Elm Street North Andover, Massachusetts Antennas in the Steeple and Equipment on the Ground Floor Prepared for: MetroPCS WIRELESS 285 Billerica Road, Third Floor Chelmsford, MA 01824 ca F- A C ^^r��"�4�'�"�.SF Dated: :�'�.3.�t# October 7, 2008 �,Fo 4n Iw�! S4' Prepared by: HUDSON DESIGN GROUP, LLC. 1600 Osgood Street Building 20 North, Suite 2-101 North Andover, MA 01845 Phone: (978) 557-5553 Hudson , Design Groupuc SCOPE OF WORK: Hudson Design Group LLC (HDG)has been authorized by MetroPCS to conduct a structural evaluation of the existing roof structure supporting the proposed MetroPCS equipment located in the areas depicted in the Hudson Design Group Lease Exhibit dated 10-02-2008. This report represents this office's findings, conclusions and recommendations pertaining to the support of MetroPCS's proposed BTS,Battery and PPC cabinets. This office conducted an on-site visual survey of the above areas on September 26, 2008. Attendees included Michael Cabral (HDG-Project Engineer),Andrew Powers(HDG-Associate). CONCLUSION SUMMARY: No design documents were available for our use. A limited visual survey of the structure was complete in or near the areas of the Proposed Work. Based on our evaluation, we have determined that, in general, structural designs to support the proposed MetroPCS Equipment within or near the Proposed Lease Area can be completed and components installed with NO STRUCTURAL UPGRADES REQUIRED to the existing structure. The proposed antennas are to be secured to pipe masts attached at the top and bottom with lag screws to the existing wood structure directly behind the existing louvers. The louvers are recommended to be replaced with an FRP material. A summary of the proposed support types and attachment locations are as follows: Proposed BTS (wt=734 lbs) ...Located at inside an existing closet supported at the ground level. Proposed Battery Cabinet(wt=2210 lbs)....Located at inside an existing closet supported at the ground level. Proposed Galaxy Power Cabinet(wt=2720 lbs)....Located at inside an existing closet supported at the ground level. Proposed PPC (wt=200+/-lbs)....Located at inside and existing closet secured to the wall. Proposed (8)Antennas............Mounted directly behind the existing louvers supported on pipe masts directly below the clock tower. , Hudson Design Groupuc r Calculations and referenced documents are attached. DESIGN CRITERIA: 1. Massachusetts State Building code, latest edition. Wind Analysis: (N/A due to Antennas being enclosed with the steeple) Reference Wind Speed, q(z): 110 mph [780CMR 1604.10] Exposure: C Category: II [ASCE 7-05 T1.1] Gust-effect Factor, G: .85 [ASCE Sect 6.5.8.1] Force Coefficient, C(f): varies [ASCE Fig 6-21] F= q(z) x G x C(f)x A(f) [ASCE 7-05 Eq 6-281 Snow Loading: Basic Ground Snow Load: 55 psf [780CMR 1604.10] 2. EIA/TIA -222-F Structural Standards for Steel Antenna Towers and Antenna Supporting Structures County: Essex Wind Load: 90 mph 3. Approximate height above grade to antennas: 80'-0" Hudson Design GrOUPLLC EQUIPMENT SUPPORT RECOMMENDATIONS: HDG recommends that the proposed equipment be located inside the existing closet below the stairs supported by the existing concrete slab. ANTENNA SUPPORT RECOMMENDATIONS: HDG recommends the antennas be located directly behind the existing louvers(See photos attached). The antennas will be supported by new pipe masts secured at the top and bottom with standard lag screws attachments to the existing wood structure. The existing louvers are recommended to be replaced with an FRP material painted to match the look of the existing louvers. Lag screws will be designed and furnished in the construction drawings I H udsan Design Group ��c LOCATION OF PROPOSED EQUIPMENT: Iowa r 3931 ■1 Ong 1� Photo 1: Sample photo of the existing closet located at the ground level below the stairs where the equipment is proposed to be located. Hudson Design GroupLLc f F E 4 l� E' Photo 2: Sample photo of the existing closet below other stairwell on opposite end of proposed equipment location. Be advised of the concrete floor shown above similar to what is supporting the proposed equipment. Hudson 00 Design GroupLLc LOCATION OF PROPOSED ANTENNAS WITHIN THE CHURCH STEEPLE. T r' Ir-41 rr rr j 1 Photo 3: Sample photo of where new MetroPCS antennas are proposed to be located behind the existing louvers shown above. These louvers are recommended to be replaced with an FRP material. e Hudson Design Groupuc PROPOSED PRELIMARY SKETCHES TOP OF EXISTING SPIR E ELN. 1567-6"± (AGL) PROPOSED ANTENNA (TYP. OF 8) BEHIND FIBERGLASS LOUVERS TO MATCH EXISTING PROPOSED ANTENNAS (TOTAL 8) EXISTING BELL _4 TOWER----TEE� 6;± (AGL) PROPOSED COAX RUN FROM EQUIPMENT TO ANTENNAS EXISTING CHURCH FLOOR LEVEL ELEV. = 37'-0" (AGL) PROPOSED 12'-10"X7'-0" LEASE PROPOSED AREA UNDER STAIRS POWER/TELCO (APPRX. 120 SQ* Fl) GROUND CONDUITS \ INSIDE CHURCH GROUND LEVEL 0' EAST ELEVATION ELEV. = -0" (ACL) REV 2: 10/02/08 REV 1: 09/29/08 SITE NO: BOS0380C Metrop �S SITE TYPE: CHURCH DATE.. SITE NAME: TRINITARIAN CONGREGATIONAL C& . 09/25/08 CHURCH UnUmR Youmeff. ADDRESS: 70 ELM STREET 285 BILLERICA ROAD-THIRD FLOOR NORTH ANDOVER, MA 01845 CHELMSFORD, MA 01824 DRAWN BY: PG SCALE: NTS PROPOSED INDOOR BATTERY CABINET PROPOSED INDOOR POWER CABINET 3'-0" r PROPOSED INDOOR MODCELLJ .� CABINET o i LOW CEILING EL.=6'-8" EXPAND INTO SLOPE UP DEAD AREA IF + + AVAILABLE EXISTING WALL EXISTING TO BE REMOVED PIPE HIGH CEILING EL=10'-5' _ 30" EQUIPMENT PLAN CLOSET UNDERNEATH STAIRS @ GRADE LEVEL REV 2: 10/02/08 REV 1: 09/29/08 SITE NAME: TRINITARIAN CONGREGATIONAL metroPC��). SITE TYPE: CHURCH DATE: CHURCH Unokm Ymme�f, 09/30/08 ADDRESS: N ELM STREET 285 CHELMSF ROAD—THIRD D MA 01824L00R DRAWN BY: PG SCALE: NTS NORTH ANDOVER, MA 01845