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0001 POWDER HOUSE LANE - BPA-13-14 Powder House Lane Project# 13-288 McBrie, LLC 160 Sylvan Street \ \ /\—Z\ / ! Telephone: 978-646-0097 Danvers, MAO 1923 Structural Design & Sales Fax: 978-646-0087 www.mcbric.com November 22, 2013 Mr. Michael Lutrzykowski Assistant Building Inspector City of Salem, Inspectional Services 120 Washington Street, 3`d floor Salem, MA 01970 RE: Visual Structural Inspection - Deteriorated concrete on light pole Bertram Field Salem, MA McBrie, LLC Project# 13-288 Dear Mr. Lutrzykowski: Per your request, McBrie, LLC performed a visual structural inspection of the above referenced location on November 21, 2013. The inspection was performed to evaluate cracking of a concrete light pole. A subject light pole top of pole 13-288 report Pagel of 3 Project# 13-288 McBrie, LLC 160 Sylvan Street Telephone: 978-646-0097 Danvers, MA 01923 Structural Design & Sales Fax: 978-646-0087 www.mcbrie.com Ef Y v w .t- cracks and r loose j concrete s cover A R bottom of pole deterioration at base efflorescence While on site, we obtained information on the manufacturer and their job number and we contacted them to determine if there was a concern. Below is the photograph and a line item summary of McBrie, LLC's conversation with the manufacturer. StressCre 7P-= .131l.d='r e` manufacturer's project/name tag 1. The mounting height of the subject pole is approximately 20' higher than the adjacent pole yet the poles were the same 79' overall length. This means the pole has either been direct buried 29' (no visible name tag indicates this) and concreted in or has been cut and "socketed" in to concrete/ledge. 2. If the pole was cut, the structural integrity of the pole has been compromised. 3. Their recommendation/opinion is that this pole should be replaced in the near future. 13-288 report Page 2 of 3 Project# 13-288 McBrie, LLC 160 Sylvan Street /'�. Y Telephone: 978-646-0097 Danvers, MA 01923 Structural Design & Sales Fax: 978-646-0087 www.mcbrie.com 4. There is no danger of immediate or concern of a catastrophic collapse due to the extensive reinforcing gage within the pole. In conclusion, based upon McBrie, LLC's observations and discussions with the pole manufacturer, the pole is not in danger of collapse in its current condition and therefore may continue to be in service through the end of the football season. Following the season, it is recommended that plans for the pole replacement be initiated immediately which should include trying to determine how the current pole is installed. Removal of that pole prior to preparation of plans/specifications for the new pole is recommended. Please do not hesitate to contact our office if you require additional information. Sincerely, OF II(q�,q E -+ m Michael Perham, PE 4143 Structural Engineer/Managing MemberIs.1 s1or� 13-288 report Page 3 of 3 r _ - MI Brie,LLC 160 Sylvan Street . PP--V 201-3 P14 3 .1 Danvers, MA 01923 t. Mr. Michael Lutrzykowski Assistant Building Inspector City of Salem, Inspectional Services 120 Washington Street, 3rd floor Salem, MA 01970 i by ��9S I!I1II,i9riPllrh4,111,1411111)IlU pulhhl,111) 11111), ,Y i - �Y I I I I1 1 111 1 111 I till I 111111 11 11 11 11 111 1 DEC-00-97 01 :58 PM STRUCTURES NORTH 9787456817 P. 02 S UICTUM N0 N CONSUI TING December 6, 1996 ENGINEERS City of Salem Building Department one Salem Green Salem, MA 01970 Attention: Mr, Leo Tremblay Inspector of Buildings Reference: Bertram Field Light Poles Dear Mr. Tremblay: We have reviewed the base conditions of the new light poles at Bertram Field and have determined that these are not adequately supported for the design seismic loading conditions as required by the Sixth Edition of the Massachusetts State Building Code. We have also checked wind loading and have found this not to govern. Our analysis was based upon the understanding that the light poles were inserted in holes drilled into the ground, described by the parties involved We understand that three of these holes penetrate 2 to 4 feet of soil and then 6 to 8 feet of bedrock and one of these penetrates directly into 8 to 10 feet of bedrock. The bases of the poles are 22" in diameter and are set in 24" diameter holes, the annular spaces around the poles being filled with stone dust. We ran two independent numerical analyses of the poles' bases by two different people, using two different analytical methods. According to our calculations, the bearing stresses of the poles against the stone dust fill at full lateral loading approach 10,300 pounds per square foot (psg by the more approximate method and 14,100 psf by the more precise method. Both of these bearing pressures exceed anything that would be considered a reasonable bearing pressure for the installation. Due to this potential overload condition,we recommend the work specified on sketches SKS-1 and 2 and described in the outline specifications. Please contact me If you have any questions. Warmest Regards, John M. Wathne, PE, President Structures North Consulting Engineers, Inc. P.O.Box 8560 • Salem,Massachusetts 01971 (508) 745-6817 • Voice /Fax 'VsaJ rv'.a.rcMd ria umw N r �t7-4 s— a s » J o 390� o '000 G_tt ��31V0 — 03Y93Hp 4 1100 VM •M31V8 'OiGt YO/0,00.A ys�� 3Lva -, - nea3itl noTtl° 'OHI 'SuMsaomz`Jamaplfn1aivoo 'ON133Hs b0 'd LT899VL8L6 HidoN S3dnionais Wd 6S: TO L6-80-33Q DEC-08-97 01 :59 PM STRUCTURES NORTH 97874556817 �-/ P. 03 D 01VI t �6,yrr ,c D D SHEETNO. 2 _ �,� OF CONSULTINGENGMEMS, INC, CALCULATED BY L- /�W� DATE `9T P. 0. BON 0600. SALEM, MA 01171 CHECNEDBY GATE Y C I C i t RAX a 0 0 0 / i 0,, 0 0 1 1 fy y SCALE '/ r r Q ma 'I A- '7-0 INl^cr r ko N \ N � Q 4 ;5 7 fit'-E/D w �'`F Gor1w5� E f9to IDG � AI�R�p.�ydY 94�i piH,pAB DEC-08-97 02 :00 PM STRUCTURES NORTH 9707456817 P. 05 �REL�� r�' STRUCTURES NORTH BERTRAM FIELD LIGHTING DECEMBER 6, 1996 SALEM, MA BERTRAM FIELD LIGHT POLE BASE CAPS OUTLINE SPECIFICATIONS SECTION 1 • GENERAL NOTES 1.1 General Contractor and all Subcontractors shall be licensed to practice in the Commonwealth of Massachusetts. 1,2 All work shall conform to the Massachusetts State Building Code, Sixth Edition. 1.3 The General Contractor shall carry liability insurance covering his operation on the site and his work. Workmen's Compensation shall also be carried on all employees on the site. The contractor shall meet all other contractual requirements of the City of Salem as may be issued as supplements or amendments to these documents. 1A The City will provide electricity and water to the as required during the work where accessible on site. The contractor shall be responsible for making proper connections to electricity and water hook-ups, 1.5 All work shall be done in a professional and workmen like manner. Materials and equipment shall comply with the contract requirements and industry standards. 1,8 All work shall be done per the drawings and outlinespecifications. Any deviations or changes in scope shall be made only with the consent of the City and the Engineer, and deviations in the contract price shall be submitted as change orders and shall be signed by both the general contractor and the City before proceeding with the portion of the work in question. 1.7 The Contractor and his subs shall visit the site and familiarize themselves with it, All existing conditions shall be verified before proceeding with the affected portion of the work and any deviations shall be brought to the immediate attention of the owner or his representative. 1.8 The Contractor shall submit material samples as required at the request of the owner before ordering materials. 1.9 The Contractor shall keep the site clean and shall pick up all debris each day, and organize his equipment and materials. 1.10 The contractor shall be responsible to maintain a clean and safe project site on a daily basis, All on-site material shall be weather protected and secured at the project site. 1.11 At the completion of all work the Contractor shall be responsible for removal of all excess materials, equipment, and construction debris, leaving the premises in clean condition. All debris shall be removed to an approved disposal location. 1 DEC-08-97 . 02 :00 PM STRUCTURES NORTH 9787456817 P. 06 PRELigiij,1 STRUCTURES NORTH BERTRAM FIELD LIGHTING DECEMBER 6, 1996 SALEM,MA SECTION 2 -SITE WORK 2.1 Remove and stockpile obstructions as directed by the owner. Protect shrubbery and structures in vicinity of work, Carefully remove and store entire fence to permit vehicular access to work area as may be required, 2.2 Stakeout limits of construction with reference to existing structures. Establish level and pian survey lines for dimensional control. Orient base caps with the primary axes of the football field. 2.3 Remove existing shrubbery and sod which is in the way of the work and, at the discretion of the City, either store for future use or dispose of offsite. 2.4 Return all damaged lawn surfaces to their original conditions. SECTION 3—CONCRETE WORK 3.1 Concrete shall reach a minimum compressive strength of 4,000 psi at 28 days. 3.2 Reinforcing steel shalt be ASTM A015, Grade 60, 3.3 Remove all loose soil materials and fractured rock to expose intact, unfractured bedrock. Clean and apply epoxy bonding agent following dowel installation and before concrete placement. 3.4 Contractor may add 6"thick leveling pads over ledge to ease formwork placement but drilled dowels shall be lengthened to account for added depth. $4 Drill holes In Intact bedrock for grouted dowels. Holes shall be 1/8" greater in diameter than nominal dowel size. Blowholes clean with air jets and fill with epoxy adhesive grout before inserting bars shortly thereafter, Adhesive grout shall be equivalent to "Sikadur Injection Gel", "Sikadur 32 Hi-Mod", or"Sikadur 31 Hi-Mod Gel" by the Sika Corporation, Lyndhurst, NJ. 3,5 Roughen and clean existing stone surface, removing all loose and weathered stone. Pressure wash and allow to dry. Apply epoxy bonding agent to surface imi nediately before concrete placement or within limitations of manufacturer, eondign agent shall be equivalent to"Sika Armatec 110 EpoCem", "Sikadur 32 Hi-Mod", or"Sikadur 32, Hi-Mod LPL" by the SiKa Corporation, Lyndhurst, NJ. 2