36C24619R0114-001.pdf

SCOPE OF WORK

Project # 652-19-101 Roof Replacement Phase 2

H.H. McGuire V.A. Medical Center

1201 Broad Rock Blvd.

Richmond, Virginia 23249

-- Project Scope --

GENERAL:

This project is located at building 500, Hunter Holmes McGuire VA Medical Center, Richmond

Virginia. The contractor is to provide all labor, materials and supervision necessary to remove existing roofing materials and install new tapered insulation and Modified Bitumen System over existing concrete roof decks. Additionally, a new ballasted railing system will be installed, as well as any required related work necessary to install a warrantied roofing system. Related work will include at a minimum: new drains, new flashings, new expansion joints, replace or relocate lightning protection to comply with applicable codes, and may include blocking replacement and other repair work as necessary. All work shall be performed in accordance with contract documents and applicable codes.

The existing roof structure is a concrete deck overlaid by a perlite asphalt blend tapered insulation and a built-up roof assembly with gravel cover. Work includes a complete tear-off of the existing system and replacement with adhered tapered insulation, cover boards, and a low VOC, low odor, SBS modified bitumen roofing system. The new roof system will include two (2) base sheets in addition to a cap sheet. Flashings may be either MBS or liquid applied.

• Replace lightning protection system on roofs / roof sections that are being replaced. Installation to comply with applicable codes/standards.

• Replace all roof drains. Roof Drains shall be cast iron with clamping device for making watertight connection. Free openings through strainer shall be twice area of drain outlet. For roof drains not installed in connection with a waterproof membrane, a soft copper membrane shall be provided 300 mm (12 inches) in diameter greater than outside diameter of drain collar.

An integral gravel stop shall be provided for drains installed on roofs having built up roofing covered with gravel or slag. Integral no-hub, soil pipe gasket or threaded outlet connection shall be provided. The roof drain shall have a beehive or dome shaped strainer with integral flange not less than 300 mm (12 inches) in diameter. For an insulated roof, a roof drain with an adjustable drainage collar shall be provided, which can be raised or lowered to meet required insulation heights, sump receiver and deck clamp. The Bottom section shall serve as roof drain during construction before insulation is installed.

• Remove all existing roofing materials down to the concrete decking in sections small enough to make watertight at the end of each work day.

• The 5TH floor roof replacement area is approximately 65000 square feet (including elevator penthouse roofs) with numerous penetrations and some rooftop equipment. The 2nd floor roof replacement area is approximately 66000 square feet (including elevator penthouse roofs) with numerous penetrations and some rooftop equipment.

• A ballasted railing system that complies with OSHA 1926.502B shall be installed at the perimeter of the 5th floor roof and at the perimeter of the 2nd floor roofs as noted in contract documents.

The approximate linear feet of railing required is as follows: 5th floor, 1500 LF and 2nd floor, 1300 LF. Spacing between vertical posts shall be between 4 ft and 6 ft to match existing installations on other roofs. Railing finish to be galvanized or powder coated. If powder coated, a silver color must be available in the manufacturer’s standard color selection. VA will choose the color from the manufacturer’s standard color selection.

• Every worker needs to be trained by the VA safety team before having access to get on the roof.

Workers must use a fall protection harnesses and anchors when within 15 feet of a roof edge.

• Contractor shall lift 4 pallets of VA equipment onto the 5th floor roof to a location designated by

VA. Each pallets weighs up to 1000 pounds.

• Contractor to retain services of an Architectural/Engineering firm if necessary to resolve any architectural/engineering that may have.

Work shall be conducted during normal business hours 8am-4:30pm weekdays unless approved by

Project Engineer/COR. Special provisions should be made for afterhours work specifically for operations producing odors, noise, shutdowns or when work occurs that interferes with staff operations or as otherwise outlined in the bid documents. In these cases, work shall be shall be coordinated with medical center staff through the Project Engineer/COR. Contractor shall incorporate and maintain all provisions of ICRA’s and ILSM’s. Contractor is responsible for preventing leaks during construction, and providing buckets, mops and any supplies and labor needed to clean up any damage resulting from leaks when they occur.