SECTION 639 - ENGINEERING FACILITIES
639.01 Description This work shall consist of providing, erecting, lighting, equipping
and maintaining buildings to be solely used by the Resident and other assigned Department representatives as a field office. Upon completion of the work, the buildings and equipment shall remain the property of the Contractor. 6-115
639.02 Materials Materials for buildings shall be of good quality customarily used in
standard frame house or office trailer construction.
639.03 General The building of the type called for shall be provided before the start of
work, and shall remain until work is completed and accepted, unless earlier removal is authorized. The location shall be approved by the Resident and should be adjacent or virtually adjacent to the Project. A fire extinguisher shall be provided in each building or office trailer for electrical and chemical fires and effective on all solvents used in the building. Walls, roof, floor, windows, and doors shall be tightly constructed to the required area. Furnishings shall be supplied as called for. Doors shall be equipped with locks and all keys shall be in the possession of the Resident. Windows shall be equipped with latches so they may be locked on the inside. Window screens and screen doors shall be supplied when necessary. Adequate desk and desk space shall be provided. If a portable table is supplied, it should be adjustable to accommodate the various heights of employees. A 5-way adjustable office chair shall be provided in the quantities listed.
639.04 Field Offices Field Offices are designated Type A, Type B, or Type C.
Buildings, including trailers, may be provided if they substantially equal or exceed the following requirements. Air conditioning, appropriate to the building size, shall be provided in all field offices. The walls, roof, and floor of the building shall be completely insulated with a minimum insulation value of R-15. Office trailers shall be either new or in very good used condition. The interior walls shall be covered with suitable wall paneling. The entire office trailer shall be for the exclusive use of the Resident. The office trailer shall be winterized and completely enclosed at the bottom, if the trailer will be used in cold weather. Other types of buildings and facilities may be furnished of equal or better quality. A public work area will be provided in the field office that shall be designed and constructed so that individuals with disabilities can approach, enter, and exit this area. At least one accessible route to the field office shall be provided from accessible parking. The accessible route shall comply with the Americans with Disabilities Act Accessibility Guidelines (ADAAG) and this specification. The minimum clear width of an accessible route shall be 36 inches except at doors. The least possible slope shall be used for an accessible route. An accessible route with a running slope greater than 1:20 shall be considered a ramp. Maximum ramp slope is 1:12. The maximum rise for any run of a ramp shall be 30 inches and the minimum clear width shall be 36 inches. Nowhere shall the cross slope of an accessible route exceed 1:50. Changes in level up to ¼ inch may be vertical and without edge treatment. Changes in level between ¼ 6-116 inch and ½ inch shall be beveled with a slope no greater than 1:2. Ramp floor surfaces shall be stable, firm, and slip-resistant. Ground floor surfaces along accessible routes and in accessible rooms and spaces including floors, walks, ramps, stairs, and curb ramps, shall be stable, firm, and slip- resistant. The main door to the public work area shall have a minimum clear opening of 32 inches with the door opened 90 degrees, measured between the face of door and the opposite stop. Minimum maneuvering clearances at doors shall be provided. The floor or ground area within the required clearances shall be level and clear. The handle and other operating devices on accessible doors shall have a shape that is easy to grasp with one hand and does not require tight grasping. Lever-operated mechanisms push type mechanisms, and U-shaped handles are acceptable designs. Hardware required for accessible door passage shall be mounted no higher than 48 inches above finished floor. A minimum of 3 parking spaces will be supplied for Class B & C Field Offices and 6 for Class A. One wheelchair accessible parking space shall be located on the shortest accessible route of travel from adjacent parking to an accessible entrance. Level landings shall be provided at bottom and top of each run. The landing shall be at least as wide as the ramp run leading to it with a minimum length of 60 inches. If a ramp run has a rise greater than 6 inches or a horizontal projection greater than 72 inches, then it shall have handrails on both sides. Handrails shall have the following features:
1.Handrails shall be provided along both sides of ramp segments. The inside handrail on switchback ramps shall always be continuous.
2.If handrails are not continuous, they shall extend at least 12 inches beyond the top and bottom of the ramp segment and shall be parallel with the floor or ground surface.
3.The clear space between the handrail and the wall shall be 1½ inch.
4.Gripping surfaces shall be continuous.
5.Top of handrail gripping surfaces shall be mounted between 34 and 38 inches above ramp surfaces.
6.Ends of handrails shall be either rounded or returned smoothly to floor, wall, or post.
7.Handrails shall not rotate within their fittings. 6-117
8.The diameter or width of the gripping surfaces of a handrail shall be 1¼ to 1½ inch, or the shape shall provide an equivalent gripping surface. Firm and sturdy steps shall also be provided with 7 inch maximum riser and 11 inch minimum depth, and at least one handrail extending from the top of the steps to a minimum 12 inches beyond the bottom of the steps. The Contractor will make reasonable effort(s) to provide wheelchair accessible toilet facilities when "portable" facilities are provided. The Contractor shall provide wheelchair accessible toilet facilities when flush type facilities, that is, those with running water, are provided; and the Contractor shall provide wheelchair accessible portable facilities, if used, when the contract duration exceeds two continuous construction seasons. In addition to the facilities previously specified in this subsection, each field office shall meet the following minimum requirements: Description Q u a n tity T y p e A Type B Type C Floor Area (Outside Dimension) - ft2 312 220 125 Inside Wall Height – feet 7 7 7 Window Area - ft2 55 35 35 Drafting Table Surface Area - ft2 15 15 15 Drafting Stools - each 2 1 1 Office Desks - each 2 1 1 Ergonomic Swivel Chairs -ea (5-way adjustable) 3 2 2 Folding Chairs - each 3 2 2 Lighting Units - each 4 2 2 Electric Wall Outlets - each 6 4 3 Power Strip Surge Protectors - each 3 2 1 Wall Closets - each 1 1 1 Plan Rack for minimum of 6 sets of plans 1 1 0 Toilet Facility 1 1 1 Wastebaskets - each 2 2 1 All windows shall be provided with shades or blinds. The toilet facility shall be for the exclusive use of State personnel. If requested, the Contractor will supply a lock to ensure exclusive use. The Resident will have the option to reject any furniture or supplies provided to the field office based on general condition. One hundred ten volt, 60 cycle, continuous electric service shall be supplied for lighting and 15 amp duplex wall outlets. Lighting shall consist of florescent light units with rapid 6-118 start bulbs or LED shop style lights located over the work areas for a minimum of 50 foot candles overall. At least one external light source will be provided. Drafting surfaces shall be 40 inches above the floor and have shelves beneath. Shelves for plans and rolls shall also be furnished overhead. Drafting stools shall be approximately 28 inches high. Desks shall be single or double pedestal standard office type, and shall be in addition to “built-in” type desks in the office trailer. Field offices shall be furnished with one four-drawer letter size metal filing cabinet. Wall closets shall be 21 inches wide, 15 inches deep, and at least 4 feet high. Each office shall be furnished with a broom, dustpan, sweeping compound, trash bags, and with cleaning material for cleaning glass. If the field office is carpeted, then a vacuum cleaner will be provided. The contractor will be responsible for disposing of trash from the field office. The Contractor shall provide a fully functional wireless deskt op copier/scanner/printer, capable of copying field books, for the Resident’s use during the project. All maintenance and supplies, except paper, shall be the responsibility of the Contractor. The Contractor shall provide bottled water and a microwave for the duration of the project. All maintenance and supplies shall be the responsibility of the Contractor. Alternate source of water, such as a water cooler, may be provided as approved by resident. The Contractor shall provide a 4 cubic-foot refrigerator in the field office for the duration of the project. Each office shall be furnished with a 10-person general-purpose first aid kit. The first aid kit shall be periodically inspected and refilled as necessary.
639.08 Heat Heat appropriate to the building size shall be supplied by the Contractor to
maintain an acceptable room temperature during occupancy. 639.091 Broadband Connection The contractor will supply one computer broadband connection, modem lease and router. The router shall have wireless access and be 802.11n or newer capable. The type of connection supplied will be contingent upon the availability of services (i.e. DSL or Cable Broadband). It shall be the contractor’s option to provide dynamic or static IP addresses through the service. The selected service will have a minimum download connection of 5.0 Mbps and 1.0 Mbps upload. The contractor shall be responsible for the installation charges and all reinstallation charges following suspended periods. Monthly service and maintenance charges shall be billed by the Internet Service Provider (ISP) directly to the contractor. 6-119
639.10 Method of Measurement Field office will be measured by the unit or lump sum
for each building provided, equipped and maintained satisfactorily.
639.11 Basis of Payment The accepted quantity of field office will be paid for at the
contract unit price each or lump sum which payment shall be full compensation for furnishing until contract completion, erecting, equipping, maintaining, furnishing electricity, heating, installing and maintaining toilet facilities and if necessary removing the buildings or office trailers. Payment for these items will be made in 3 parts; the first payment of ½ to be made after the Contractor has supplied the building or office trailer and it has been approved. The remaining payments shall be made at intervals as follows: A second payment of ¼ shall be made when one-half of the anticipated work has been completed. The final payment of the remaining ¼ shall be made upon completion of the work. Payment will be made under: Pay Item P a y U n i t
639.18 Field Office, Type A Each
639.19 Field Office, Type B Each
639.20 Field Office, Type C Each
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Source: Standard Specifications — Highways and Bridges, 2020 Edition. Pages 584–589 of 817. View official source ↗