Scope of Work Overhead Doors Concrete Driveways.pdf

Outside Maintenance Overhead Doors and Concrete Driveways Gavins Point Project

SCOPE OF WORK

Contractor shall provide all equipment, labor, materials, and disposal required to construct framed openings and install six (6) new commercial overhead doors, thirty-nine (39) protective bollards, and four (4) concrete driveways. This work is located at the Gavins Point Project Outside Maintenance Yard.

Contractor shall cut and remove specified sized areas from the existing buildings’ envelopes (see Sheet 102 thru 105). Doors shall be sized to ensure a weather tight fit. New frames shall be finished to match existing openings (steel for buildings 1 and 2, aluminum for buildings 5 and 6). Three doors (buildings 1 and 2) are required to be insulated and three doors (buildings 5 and 6) uninsulated. All doors shall come with new tracks and electric openers. Concrete driveways are to be six (6) inches in depth rebar reinforced with three (3) inches of compacted gravel cushion. Additional details follow.

INSULATED DOORS

The new insulated sectional commercial overhead doors are required to be steel-skinned front and back, with a minimum R-15 value. One panel for each door shall contain windows. The windowed panel is to be installed at eye level. Doors shall include weatherstripping and shall be sized to ensure adequate frame overlap for a weather-tight fit. Color is to be white. Each door requires new tracks, an electric opener, a three-button station, and obstruction sensors. The electric openers for the insulated doors shall be 115V ceiling mounted trolley operators (minimum 1/2 HP) rated to handle at least 12-15 cycles per hour. The three-button stations shall contain Open, Close, and Stop functions. Stations are to be wired and wall-mounted adjacent to the side of the door nearest the personnel doors. All wiring for the three-button stations and the obstruction sensors that is not low voltage (50V or less) shall be run through Electrical Metallic Tubing (EMT). All wiring, low voltage or otherwise shall meet NEC requirements. Final installation of overhead doors shall be inspected and test operated prior to acceptance.

UNINSULATED DOORS

The new uninsulated sectional commercial overhead doors are required to be steel with a ribbed exterior. Doors shall include weatherstripping and shall be sized to ensure adequate frame overlap for a weather-tight fit. Color is to be white. Each door requires new tracks, an electric opener, a three-button station, and obstruction sensors. The electric openers for the uninsulated doors shall be 115V ceiling mounted trolley operators (minimum 1/2 HP) rated to handle at least 12-15 cycles per hour. The three-button stations shall contain Open, Close, and Stop functions. Stations are to be wired and wall-mounted adjacent to the side of the door nearest the personnel doors. All wiring for the three-button stations and the obstruction sensors that is not low voltage (50V or less) is required to be run through Electrical Metallic Tubing (EMT). All wiring, low voltage or otherwise shall meet NEC requirements.

Final installation of overhead doors shall be inspected and test operated prior to acceptance.

NEW DOOR OPENINGS

Building 1: Sheet 102 Expand the current East opening 4 feet to the north to create an opening that is 16’W by 14’H. The existing walls of bldg 1 are full-height concrete masonry units (CMU) construction. The door expansion can be framed from contractor CMU cuts and the existing concrete beam. Trim and color shall match the current steel trim.

Building 2: Sheet 103 Create a new 12’W by 12’H opening on NE end of the building. The opening should be roughly centered between the existing door and the wall. Install new 12’W x 12’H insulated overhead door. Exact location to be determined onsite by USACE representatives. Install a 20’W by 20’L concrete pad that ties in to existing concrete pad. Install interior and exterior bollards.

Create a new 14'W by 12'H opening on SW end of the building. The opening should be roughly centered between the existing door and the wall. Install new 14’W x 12’H insulated overhead door. Exact location to be determined onsite by USACE representatives. Install a 16’W by 20’L concrete pad. Install interior and exterior bollards.

Existing walls are of CMU construction for the first 4 feet in height with the remaining height composed of insulated steel. Framing material for the new doors can be at the contractor’s discretion, any wood frames require pressure treated lumber. The frame will be required to be properly insulated and tied into the structural steel members of the building. Trim and color shall match the current steel trim.

Building 5: Sheet 104 Create a new 14'W by 14'H opening on SW end of the building. Work activities will include the removal of two 5” by 6” wooden columns and the addition of one 6” by 6” wooden column. The existing cross bracing shall be trimmed back to the new opening. The new support column shall be installed prior to the removal of the old columns. The new column is required to be a 6” by 6” structural green pressure treated timber that is 20’ long. Four feet shall be below grade encased in a 12” diameter concrete footing with an anchor plate at the surface. Exact location to be determined onsite by USACE representatives. The old columns are to be cut at the surface with USACE taking possession once removed. Remaining wood in the old footings is to be sufficiently excavated to allow a flush non-shrink grout finish. The new column, old column, and existing header can be utilized for the new door opening framing. All trim shall match the existing aluminum trim on the building. Trim color to be white. Install new 14'W by 14'H uninsulated overhead door. Install a 16’W by 20’L concrete pad in front of new door.

Install interior and exterior bollards.

Building 6: Sheet No. 105 Create a new 14'W by 14'H opening on SW end of the building. Work activities will include the removal of two 5” by 6” wooden columns and the addition of one 6” by 6” wooden column. The existing cross bracing shall be trimmed back to the new opening. The new support column shall be installed prior to the removal of the old columns. The new column is required to be a 6” by 6” structural green pressure treated timber that is 20’ long. Four feet shall be below grade encased in a 12” diameter concrete footing with an anchor plate at the surface. Exact location to be determined onsite by USACE representatives.

The old columns are to be cut at the surface with USACE taking possession once removed. Remaining wood in the old footings is to be sufficiently excavated to allow a flush non-shrink grout finish. The new column, old column, and existing header can be utilized for the new door opening framing. All trim shall match the existing aluminum trim on the building. Trim color to be white. Install new 14'W by 14'H uninsulated overhead door with a 16’W by 20’L concrete pad.

Create a new 14'W by 14'H opening on SE end of the building. Work activities will include the removal of two 5” by 6” wooden columns and the addition of one 6” by 6” wooden column. The existing cross bracing shall be trimmed back to the new opening. The new support column shall be installed prior to the removal of the old columns. The new column is required to be a 6” by 6” structural green pressure treated timber that is 20’ long. Four feet shall be below grade encased in a 12” diameter concrete footing with an anchor plate at the surface. Exact location to be determined onsite by USACE representatives during construction. The old columns are to be cut at the surface with USACE taking possession once removed. Remaining wood in the old footings is to be sufficiently excavated to allow a flush non-shrink grout finish. The new column, old column, and existing header can be utilized for the new door opening framing. All trim shall match the existing aluminum trim on the building. Trim color to be white.

EXTERIOR BOLLARDS

Contractor to install 19 exterior bollards. Exterior bollards shall be 6 inches in diameter and ¼” thick steel encased poured-in-place concrete bollards. A minimum of 36 inches is to be above the driveway surfaces with an additional 42 inches extending below grade. Reference Sheet 101 for bollard specs and approximate locations. Exact locations to be determined onsite by USACE representatives.

There are 3 locations where exterior bollards are required to be installed inside existing pavement footprints. In those instances, the contractor is required to cut a 16” x 16” square out of the existing pavement for proper installation space. One location will require the new concrete to be tied in with #5 rebar to the existing concrete (see Sheet 101, Detail 2). Two locations will require the placement two bollards into existing asphalt pavement. Cut 16” x 16” square out of the existing Asphalt and pour concrete back after installation of bollard to a minimum of 4”. Rebar is to be installed per Sheet 101, Detail 3. The removal of the 1 exterior bollard on Building 1 shall be cut flush with the existing concrete pad.

INTERIOR BOLLARDS

Contractor to install 20 interior bollards. Bollards shall be 6 inches in diameter steel and a minimum of 36 inches in height. Wall thickness shall be a minimum of ½”. They shall be surface mounted with concrete anchors. The mounting plate is to have a minimum of 4 anchor points. See Sheet 101 Detail 1 for bollard specs. Exact locations to be determined onsite by USACE representatives.

CONCRETE DRIVEWAYS

Concrete work will consist of placing 4000 psi concrete driveways for the new overhead doors. There is one driveway that will have to be tied into an adjoining driveway (see Sheet 101 – Detail 5). The concrete driveways shall match the existing slope of adjacent concrete and hard pack. Contractor shall excavate and stockpile existing material to allow for a 3-inch gravel cushion layer and a 6-inch thick concrete pad. The concrete is required to contain #5 rebar placed at mid-depth and evenly spaced at 2’ on center, see Sheet 101 Detail 4. Outer rebar will be 3” off the concrete edge. Install ¾” expansion joints against existing building foundations and the new bollards see Sheet 101 – Detail 1.

Building 2 – East pad shall be tied and epoxied into existing concrete. 6” of embedment into each concrete slab with #5 rebar see Sheet 101 Detail 5. Control joints are to be sawcut 1½” deep. 1 vertical and 1 horizontal saw cut centered in each slab. Concrete to have a medium broom finish.

All concrete should meet SDDOT Standard Specifications for Roads and Bridges 2015 edition, Section 462 Concrete for Incidental Construction - Class M6 standards (see page 333).

All Gravel Cushion should meet SDDOT Standard Specifications for Roads and Bridges 2015 edition, Section 882, Table 1 Gravel Cushion spec (see page 547).

WORK SEQUENCING

To minimize exposure and to allow efficient government use, the contractor shall complete all overhead doors for individual buildings before moving on to the next. After demolition for new openings, temporary weather protection shall be installed until new door panels are in place. All other work will not be required to be accomplished per building and can be placed simultaneously.

ENVIRONMENTAL PROTECTION

In order to prevent, and to provide for abatement and control of any environmental pollution arising from the construction activities in the performance of this contract, the Contractor and his sub-contractors shall comply with all applicable federal, state and local laws and regulations concerning environmental pollution control and abatement.

*Notification: The Contracting Officer will notify the Contractor in writing of any noncompliance with the aforementioned federal, state or local laws or regulations. Such notice, when delivered to the Contractor or his authorized representative at the site of the work, shall be deemed enough for the purpose. The Contractor shall, after receipt of such notice, immediately inform the Contracting Officer of proposed corrective action and take such action as may be approved. If the Contractor fails or refuses to comply promptly, the contracting Officer may issue an order stopping all or part of the work until satisfactory corrective action has been taken. The Contractor shall make the subject of a claim for extension of time or no part of the time lost due to any such stop orders for excess costs or damages.

SAFETY REQUIREMENTS

The Contractor shall ensure that safe working practices are utilized and that all equipment meets the requirements of the US Army Corps of Engineers, "Safety and Health Requirements Manual", EM 385 1 1, 30 November 2014, before work begins. A copy of the above manual is available at the Gavins Point Dam Project Office, 55245 Highway 121, Crofton, NE.

a. Ground Fault Circuit Interrupters: In addition to the requirements of paragraph 11.C.05 of EM 385 1 1, ground fault circuit interrupters are required for all extension cord systems.

b. First Aid and Medical: First aid facilities shall be made available on the job site. Arrangements for emergency medical attention shall be made prior to start of work. All emergency numbers (doctor, hospital, ambulance, fire department) shall be posted, or made available at the work site.

UTILITIES AND RESTROOMS

Water and power are available. The contractor shall be responsible for any connections, cords, hoses, etc that are needed. For other than water and power, the contractor shall make his own arrangements for use of public and private utilities. Bathrooms are not available and the contractor will be required to provide their own facilities.

HOUSEKEEPING

Daily cleanup of all debris and waste materials is required. Adequate disposal containers shall be placed strategically around the site and debris shall be removed on a regular basis. Placement of disposal containers shall be coordinated through the Contracting Officer’s Representative (COR) or designated government representative.

PROTECTION OF EXISTING FACILITIES

Contractor shall be responsible for protection of all structures, equipment, and vegetation (such as trees, shrubs, and grass) on or adjacent to the work site, which are not to be removed and which do not unreasonably interfere with the work required under this contract.

WORK AND MATERIALS GUARANTEE

The Contractor will guarantee materials and workmanship for one year from the date the Government takes ownership. Any additional manufacturers equipment warranties for doors, door openers, etc shall be listed and submitted to the Government.

COMMENCEMENT, PROSECUTION AND COMPLETION OF WORK

Contractor shall start coordination and submittal actions within 10 calendar days from notice to proceed. All work shall be complete and ready for use no later than 270 calendar days from notice to proceed. This includes final clean up.

SUBMITTALS

Data Sheets for the following items are to be submitted to the government for approval prior to contractor procurement:

-Doors with sizing data -Door Openers including 3 button station and sensors -Exterior Bollards -Interior Bollards with proposed anchoring data -Gravel Cushion Material -Concrete Mix -Expansion Joints -#5 Rebar with chairs -Treated Lumber for columns and frames -Electrical Metallic Tubing (if needed)