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HomeMy WebLinkAbout1994-055 Contract - Miller-Gardner CITY OF ASHLAND PERSONAL SERVICES CONTRACT FOR SERVICES LESS THAN $15~000 CITY OF ASHLAND, (CITY) CONSULTANT: Miller-Gardner, Inc. 20 E. Main St. Address: 9570 SW Barbur Blvd., Suite 100 ~ ~.~ (,~ ~- I V ~ D Ashland, Oregon 97520 Portland, OR 97219-5412 (503) 482-3211 FAX: (503) 488-5311 Telephone: (503) 246-1250 FAX (503) 246-1395: AGREEMENT DATE: 6/15/94 I[3. BEGINNING DATE: 6/20/94 114. COMPENSATION: $11,216.00 113. COMPLETION DATE: Approximately 2 months after beginning date 111. SERVICES TO BE PROVIDED: As per consultant's proposal. (attached) ADDITIONAL TERMS: CITY AND CONSULTANT AGREE: 1. All Costs bv Consultant: Consultant shall, at its own risk and expense, perform the personal services described above and, unless otherwise specified, furnish all labor, equipment and materials required for the proper performance of such service. 2. Qualified Work: Consultant has represented, and by entering into this contract now represents, that all personnel assigned to the work required under this contract are fully qualified to perform the service to which they will be assigned in a skilled and workerlike manner and, if required to be registered, licensed or bonded by the State of Oregon, are so registered, licensed and bonded. Consultant shall also procure and maintain a current City of Ashland business license. 3. Completion Date: Consultant shall start performing the service under this contract by the date indicated above and complete the service by the completion date indicated above. 4. Compensation: City shall pay Consultant for service performed, including costs and expenses, the sum of specified above. Once work commences, invoices shall be prepared and submitted by the tenth of the month for work completed in the prior month. Payments shall be made within 30 days of the date of the invoice. Should the contract be prematurely terminated payments will be made for work completed and accepted to date of termination. 5. Ownership of Documents: All documents prepared by Consultant pursuant to this contract shall be the property of City. 6. Statutory Requirements: ORS 279.312, 279.314, 279.316 and 279.320 are made part of this contract. 7. Indemnification: Consultant agrees to ~fe,m~l, indemnify and save City, its officers, employees and agents harmless from an~P'and all-losses, claims, actions, costs, expenses, judgments, subrogations, or other damages resulting from i~?l~4r¥~to any person (includjrLq_iniu_Lv/e¢~J[ing in death,) or damage (,nclud,ng loss or destruct,on) to property, of whatooovor ;r~'l~l~n~t~(~f~',n¢,dent to theV~ee~r~t c~'~ere o~s'/Vcontract by Consultant (including but not limited to, Consultant's employees, agents, and others designated by Consultant to perform work or services attendant to this contract.) Consultant shall not be held responsible for any losses, expenses, claims, subrogations, actions, costs, judgments, or other damages, directly, solely, and approximately caused by the negligence of City. 8. Termination: This contract may be terminated by City by giving ten days written notice to Consultant and may be terminated by Consultant should City fail substantially to perform its obligations through no fault of Consultant. 9. Independent Contractor Status: Consultant is an independent contractor and not an employee of the City. Consultant shall have the complete responsibility for the performance of this contract. Consultant shall provide workers' compensation coverage as required in ORS Ch 656 for all persons employed to perform work pursuant to this contract and prior to commencing any work, Consultant shall provide City with adequate proof of workers' compensation coverage· Consultant is a subject employer that will comply with ORS 656.017. 10. insurance: Consultant shall, at its own expense, at all times during the term of this agreement, maintain in force a comprehensive general liability policy including coverage for contractual liability for obligations assumed under this Contract, blanket contractual liability, professional errors and omissions, products and comp~¢ted operations and comp_rchensive~.r~mobile liability inciuding owned and non-owned automobiles. The liability under each pqlicy sha~.~ ~ minimum of $500,000 per ~'""oo~l~"cel~mbined single limit for bodily ~njury and property damage claims) or $500,000 per-~]5~ro~o~fl~odily injury and $100,000 per occurrence for property damage. Liability coverage shall be provided on an "occurrence" not "claims" basis. The City of Ashland, its officers, employees and agents shall be named as additional insureds. Certificates of insurance acceptable to the City shall be filed with City's Risk Manager prior to the commencement of any services by Consultant under this agreement. These certificates shall contain provision that coverages afforded under the policies can not be canceled and restrictive modifications cannot be made until at least 30 days prior written notice has been given to City. A certificate which states merely that the issuing company "will endeavor to mail" written notice is unacceptable. 11. Assignment and Subcontracts: Consultant shall not assign this contract or subcontract any portion of the work without the written consent of City Any attempted assignment or subcontract without written consent of City shall be void. Consultant shall be fully responsible for the acts or omissions of any assigns or subcontractors and of all persons employed by them, and the approval by City of any assignment or subcontract shall not create any contractual relation between the assignee or subcontractor and City. Its President Fed. ID# 93-0739042 City Ad ministrator,~,..~ CONTENT REVIEW: L'C.J~\. (City Dept. Head) Date: (City Attorney) Date: FORM REWEW: ? Coding.' [ (for City purposes only) CITY OF ASHLAND PERSONAL SERWCES CONTRACT <$15,000 (p:formsla-shrtps.fk)(rev'd 7/93) Miller-Gardner, Inc. CONSULTING ENGINEERS AND ASSOCIATES August 5, 1994 9570 SW BARBUR BLVD. SUITE 100 PORTLAND, OR 97219-5412 (503) 246-1250 FAX: 246-1395 Mr. John McLaughlin Planning Director City of Ashland 20 East Main Street Ashland, OR 97520 Subject: Seismic Evaluation Report for City of Ashland City Hall (File ~40250) Dear Mr. McLaughlin: Attached you will find three (3) sets of our Seismic Evaluation Report for the City of Ashland City Hall. We would like to express our appreciation for your assistance with our site investigation. We are proceeding with the design phase of this project and will contact you about the south addition and elevator. If you have any questions, please contact this office. Respectfully, ~c_~_ ~.~, ~~ Raymond T. Miller, P.E. Encls. SEISMIC EVALUATION - CITY HALL ASHLAND, OREGON Introduction The City of Ashland, Oregon has contracted Miller-Gardner, Inc. (MGI) to provide engineering services for the seismic upgrade of the Ashland City Hall. The purpose of this evaluation is to provide information to upgrade the building to a minimum standard of safety required to protect the occupants during an earthquake; To meet this requirement, this report addresses the following items: · Evaluate the building for compliance with the State of Oregon's Structural Specialty Code (Based on the 1991 Uniform Building Code) for Seismic Zone 3 criteria. · Examine proposed repairs to the building in order of priority, and consider alternatives when possible. · Provide a cost estimate for the seismic retrofit including both structural and cosmetic repairs, The City of Ashland has requested that modifications to the building be prioritized based on public exposure to existing building hazards, and that a cost estimate be included. In addition, the work needs to be completed with minimum disruption to city operations and personnel. This report will also address the proposed second floor addition at the south end of the building. The addition will be constructed above the existing one-story section and will incorporate an elevator for handicapped accessibility. The seismic evaluation is based on visual observations made by staff members of MGI during a site investigation conducted on June 28, 1994. No destructive testing was done. In addition, drawings of the most recent remodel were provided by the City of Ashland. John McLaughlin, of the City of Ashland, accompanied the evaluation team for portions of the site investigation. SUMMARY Based on the findings of our field investigation and our preliminary calculations, the scope of the seismic upgrade of the Ashland City Hall will include repairs or modifications to five building components. These consist of bracing the exterior brick wall above the roof (parapet), extrerior and interior brick wall lateral ties at the roof, ceiling, and floor levels, adding interior shearwalls. roof diaphragm reinforcement, and the addition of a braced steel frame inside at the north wall. The estimated total cost for the upgrade including the second floor addition is $330,000. ASHLAND CITY HALL Seismic Evaluation Page 2 BACKGROUND The original two-story portion of the City Hall building was constructed in 1891. The extedor 12-inch brick walls support the wood framed roof, ceiling, and floors. The second floor in this area is supported at the center by a wood beam and column line. A two-story addition to the north' was completed by removing the exterior brick wall and building a new exterior brick wall a,oproxiamately 12 feet toward the street, with roof and floor framing that generally matches the original. A one-story addition to the east was constructed in the space between the City Hall and the adjacent existing building. This area has had a partial second story added. Two smaller additions were constructed out of concrete and concrete block at the south end of the building. The original exposed brick on the north, south, and west walls has been covered by cement piaster. Also, the interior of the building has been remodeled several times. INVESTIGATION · Roof Framing The roof joists on the original part of the building span between the east and west walls. Joists are supported by a pony wall bearing on the ceiling joists. The lX8 roof sheathing is perpendicular to the joists, and a membrane roof has been installed during a recent remodel. The roof slopes toward the south exterior wall where the 8-inch un-reinforced brick parapet is approximately 4 feet high. The top of the parapet is approximately level around the building with a minimum height of 1 foot at the north end. · Ceiling Framing The ceiling joists on the original part of the building span between the east and west 12-inch brick walls. The joists are supported by a 4-inch ledge with the remaining 8-inch brick wall continuing above the ceiling line to become the parapet. Anchors embedded in the brick wall are visible along the east exterior of the building and appear to be located at the ceiling line. Connection of these anchors to the ceiling framing could not be verified. An additional ceiling, approximately 4 feet below the original, has been added as part of a remodel. · Second Floor Framing The second floor joists are embedded into the east and west brick walls of the original part of the building and are supported at the interior by a wood beam and post line. Typical floor joists are 2x10 with diagonal sheathing over. At the common building wall to the east, floor joists are supported by a wood beam and post system. ASHLAND CITY HALL Seismic Evaluation Page 3 First Floor Framing We were not able to find access to the crawl space below the first floor. Crawl space ventilation is present at the west wall through grating in the sidewalk. One vent is present at the southeast comer of the original portion of the building. These vents were partially blocked by debris. Per our conversation with Mike Broomfield, of the City of Ashland, the crawl space for the east part of the building is vented to the adjacent building. Walls The north and west exterior walls are 12-inch thick brick with a cement plaster finish. Window and door openings account for 55 percent of the west wall length and 88 percent of the north wall length. The interior 12-inch brick walls at the east and south were part of the original structure and are still exposed for part of the second floor. The brick on the east wall is not covered with cement plaster. Deterioration of bdck and plaster was noted at the exterior openings. The east wall on the first floor is a brick wall that is common with the adjacent building. The second-story of the east addition has concrete walls that are supported by the wood floor framing. Additional wood floor framing was added in this area during a previous remodel. The one-story south addition has concrete walls with a small adjacent room made of concrete block. RECOMMENDED REPAIRS The following repairs and modifications to the building are presented in order of priority based on the resulting reduction of seismic hazards. We have also considered each items relationship to the others as part of the building's lateral force resisting system. An estimated cost is noted for each item. 1. Parapet Bracing ~ Brick parapets that extend more than 12 inches above the roof framing should be supported by steel bracing (see enclosed Figure 1). Bracing is required for parapets at the east, west, and south walls of the original building, and the portion of the north wall that is east of the original building. Parapet bracing is relatively easy because it is completed from the outside of the building, with a minimum disruption to the occupants. It will reduce the risk of falling debds during an earthquake. The estimated cost of bracing including r&pair of roofing is $11,000. ASHLAND CITY HALL Seismic Evaluation Page 4 Wall Ties to Roof, Ceiling, & Floor All brick, concrete, and masonry walls need to be supported laterally at the roof ceiling and floor levels. Connections must be provided to transfer lateral forces both parallel and perpendicular to the walls. These requirements can be met using manufactured steel ties to the wood framing in combination with embedded anchor bolts in the walls (see enclosed Figure 2). By providing wall ties, seismic forces from the walls will be transferred to the roof, ceiling, and floor systems and will increase the stability of the walls. Although the installation of ties must be done from inside the building, there is access to the ceiling areas so damage to interior walls and finishes could be minimized. The work could be completed in stages so the building could remain operational. Also, some ties have already been installed at the floor level during a previous remodel. The estimated cost of wall ties to the roof, ceiling, and second floor is $61,000. We also recommend that if possible the concrete walls at the east side of the second floor be removed and replaced with a metal stud system as noted above for the addition. Although the floor framing in this area has been reinforced to support the concrete vertically, these walls will exert a significant seismic force on the building due to their weight. Replacement of these walls would reduce the seismic forces on some of the elements addressed in this report. Interior Shearwalls Interior plywood shearwalls are required at two locations on both levels (see enclosed Figure 3). These walls will provide additional resistance to lateral forces. Between the roof and second floor, existing walls can be used by removing the lath and plaster and installing plywood nailed directly to both sides of the wall studs. Connections at the roof and second floor to transfer loads through the shearwalls. At the ground floor, it may be possible to use the brick walls of the existing interoir vaults to resist lateral forces by tying them to the floor framing. If the vault walls are not accesible and cannot be used, plywood must be added to both sides of existing walls. These walls will require connection to the foundation supporting the floor system. In addition, new concrete footings may be required beneath the floor at these locations to anchor the walls. Construction of interior shearwalls will result in some disruption to the building operation. The estimated cost for intedor shearwalls at the ground and second floors is $22,500. ASHLAND CITY HALL Seismic Evaluation Page 5 4. Roof Diaphragm The existing roof sheathing at the original building does not provide an adequate system to transfer lateraJ forces to the proposed shearwails and must be reinforced. Because the roofing matedHal is relatively new, it is preferable to make modifications to the underside of the roof, ceiling framing. Light gage steel strapping nailed to the underside of the roof joists in an 'X" brace pattern will transfer lateral loads to the top of each shearwall and to exterior walls (see Figure 4). Detailed connections must be provided at all brick walls and plywood shearwalls. In addition to the strapping, plywood sheathing will be required for four feet at the perimeter and at the proposed shearwalls. Installation of the strapping is done from the attic space and therefore should not interrupt operation of the building. Access may be difficult due to HVAC ducts and other obstructions. The strapping at the roof will complete the load transfer between the wall ties and the proposed shearwalls (see above items 2 & 3). The estimated cost for roof strapping and plywood is $26,300. Braced Frame at North Wall The north brick wall of the building does not have adequate capacity to resist lateral forces at the main floor level. We propose the construction of a braced steel frame along the north wall that would resist lateral forces in the east west direction. The frame would be tied to the brick wall and second floor framing. Approximately six steel columns would be located along the existing north wall to transfer forces to the foundation (see enclosed Figure 5). These columns could be covered, or be painted and left exposed. Cross members and bracing would be located above the ceiling level. The estimated cost for the steel frame, ties to the brick, foundation, and interior repairs is $45,500. Another option for the north wall is to construct a pneumatically placed concrete wall on the inside face. This concrete wall would resist lateral forces and support the existing brick as a veneer. Construction of the wall would probably cause more disruption to the office than the steel frame. Estimated cost for this option is $58,500. [ Second Floor Addition The City of Ashland has proposed a second floor addition be constructed over the existing concrete walls of the one-story section at the south end of the building. The existing roofing matedal would be removed and new steel pudins would be placed to frame the floor level to match the existing. Additional reinforcement of the existing concrete walls may be required over window and door openings. Metal studs with plywood sheathing would frame the walls, and a synthetic stucco surface could be used to match the existing exterior. The estimated cost for this addition is $92,000.