Attach_5_-_Amend_0001_Multiuse_Pavilion_Specifications_-_REV_0001.pdf

Statement of Work - REV

Lorton Multi-use Pavilion Structure

PART 1. GENERAL

1.1 PROJECT DESCRIPTION

This contract is for the construction of a shade structure at the Lower Potomac Field Station, Meadowood Recreation Site. The final location is currently proposed at the Mustang Loop trail head. The Bureau of Land Management (BLM) requires design, supply, assembly, and installation of a shade structure at the Lower Potomac Field Station, Meadowood Recreation Site.

The overall purpose of the contract is to provide protection from the elements during winter and also supply shade during the summer months.

1.2 STRUCTURE DESCRIPTION

The shelter/pavilion shall consist of a prefabricated metal, wood, or hybrid shelter/pavilion over a gravel slab. The structure shall be supported by helical piers.

1.3 RELATED SECTIONS

A. Earthwork

a. The contractor shall engage a qualified geotechnical engineering testing agency to perform tests and inspections.

b. The geotechnical investigation shall consist of, at a minimum, three (3) borings along the length of the pavilion and extend at least 30 feet below the existing grade.

B. Utility Identification

a. The contractor shall be responsible for notifying “One Call” for where the project is to be located.

C. Permits

a. The contractor shall be responsible for coordinating and obtaining permits for the project from local, state, and other federal agencies, as necessary.

1.4 SYSTEM DESCRIPTION

A. The pavilion is proposed to be 80 feet x180 feet with an eave height of 16 feet and a structure height not to exceed 30 feet.

B. Design Loads: The design shall meet all the requirements of the latest Uniform Building Code in addition to all applicable specifications. The basic design loads shall include live, wind, and seismic in addition to the dead load. All other design loads, whether they be of static, dynamic, or kinetic, shall be considered as auxiliary loads.

a. Roof covering shall be designed for either 50 psf uniformly distributed or a 200-pound concentration load location at center of maximum panel span. The most severe conditions shall govern.

b. Purlins shall be designed for 40 psf uniformly distributed over the roof area which they support.

c. Primary framing shall be designed for 40 psf uniformly distributed over the roof area which it supports.

d. Roof covering, purlins and the primary framing at major roof projections shall be designed for snow load accumulation of 40 psf.

C. Design Method: per applicable building code.

D. Structure and footings shall be designed by a licensed engineer considering local conditions including the Geotech soil report.

E. 10-foot minimum distance around the pavilion shall be graded so that water will drain away from the pavilion slab

1.5 REFERENCES

A. American Institute of Steel Construction (AISC) B. American Iron and Steel Institute (AISI) Specification for Cold Formed Members.

C. American Society of Civil Engineers (ASCE) D. American Society of Testing Materials (ASTM) E. American Welding Society (AWS) F. International Building Code (IBC) G. National Design Specification (NDS) for Wood Construction H. OSHA Steel Erection Standard 29 CFR 1926

*Note that this is not to serve as an all-inclusive list of codes and standards.

1.6 SUBMITTALS

A. Submit two (2) sets of shop drawings and a copy of the geotechnical investigation report.

1.7 QUALITY CONTROL AND ASSURANCE

A. Supplier Qualifications

a. The contractor shall be responsible for obtaining and providing qualifications and quality control procedures from suppliers.

B. Contractor

a. A copy of contractor qualifications, certifications, professional licensure, and proof of insurance shall be provided.

C. Subcontractors

a. A copy of subcontractor qualifications, certifications, professional licensure, and proof of insurance shall be provided.

D. QA/QC Plan

a. The contractor shall be responsible for providing a quality assurance and quality control plan during construction that will be implemented during the construction of the project, as well as designate a quality control manager for the project.

E. Product Data

a. Test results for field installed materials (i.e.: concrete, compacted soil, etc.) shall be provided for to the contractor, and a copy held available for the Government.

1.8 DELIVERY AND STORAGE

A. Vendor will be responsible for all

B. Unload materials with necessary equipment, store materials and equipment in a designated area. Equipment and materials that may be compromised by exposure to direct sunlight or other elements should be covered. Inspect parts within 48 hours of delivery, compare with manufacturer’s bill of materials, and report any missing or non-conforming parts to the manufacturer within this time.

C. Contractor shall be responsible for all necessary concrete, materials, electric, water, toilets, engineering and labor per schedule.

1.9 GOVERNMENT RESPONSIBILITIES

A. Complete an environmental assessment of the facility prior to the construction or installation of the pavilion.

PART 2 MATERIAL

2.1 MATERIALS

A. Structural Framing: Structural framing shall consist of structural steel.

B. Roofing: Shingles.

C. Metal roofing trim shall match the color of the roof.

D. Final color of the pavilion will be selected from BLM’s Standard Environmental Color Chart.

2.2 FABRICATION

A. All columns, trusses, beams, and tension members shall be prefabricated, off-site.

B. Factory welded connections shall be made by certified welders in accordance with AWS specifications and be supervised by an AWS certified welding inspector.

PART 3. CONSTRUCTION

3.1 PRE-INSTALLATION MEETINGS

A. Prior to the start of sitework a site walkdown will be coordinated between the contractor and the Government.

3.2 TRAFFIC IMPACT

A. Construction work and deliveries shall be coordinated to minimize interference with adjoining roads, streets, walks and other adjacent occupied or used facilities.

a. If road or street closures are necessary, alternate routes around closed or obstructed traffic ways shall be provided, if required by the Government or authorities having jurisdiction.

3.3 SITE CLEARING

A. Section work includes:

a. Protecting existing vegetation to remain;

b. Removing of existing vegetation beneath the pavilion footprint.

c. Clearing and grubbing; and

d. Stripping and stockpiling topsoil as necessary.

3.4 GROUNDWORK

A. Dewatering

a. Prevent surface water and ground water from entering excavations, from ponding on prepared subgrades, and from flooding Project site and surrounding area.

b. Protect subgrades from softening, undermining, washout, and damage by rain or water accumulation.

i. Reroute surface water runoff away from excavated areas. Do not allow water to accumulate in excavations. Do not use excavated trenches as temporary drainage ditches.

B. Excavation

a. If necessary, excavate to indicated elevations and dimensions within a tolerance of plus or minus 1 inch. If applicable, extend excavations a sufficient distance from structures for placing and removing concrete formwork, for installing services and other construction, and for inspections.

C. Grading

a. Uniformly grade areas to a smooth surface, free of irregular surface changes. Comply with compaction requirements and grade to cross sections, lines, and elevations indicated.

D. Subgrade

a. Place backfill and fill soil materials in layers not more than 8 inches in loose depth for material compacted by heavy compaction equipment and not more than 4 inches in loose depth for material compacted by hand-operated tampers.

b. Place backfill and fill soil materials evenly on all sides of structures to required elevations and uniformly along the full length of each structure.

c. Compact soil materials to not less than the following percentages of maximum dry unit weight according to ASTM D 1557

E. Subbase

a. Base course material shall be placed on subgrades free of mud, frost, snow, ice, or water.

b. Compact subbase at optimum moisture content to required grades, lines, cross and sections at required thickness to not less than 95 percent of maximum dry unit weight according to ASTM D 1557.

c. Base course material shall consist of naturally or artificially graded mixture of natural or crushed gravel, crushed stone, and natural or crushed sand; ASTM D 294/D 2940M 0;

with 100 percent passing a 3/4-inch sieve and not more than 8 percent passing a No. 200 sieve.

3.5 EXECUTION

A. Installation will be in accordance to the manufacturer’s engineering specification instructions.

B. When unloading, padded forks and other precautions to protect finished materials will be used.

Field handle the material carefully to avoid damage construction materials.

3.6 PROTECTION

A. Protection and keep newly graded areas free from traffic, freezing, erosion, and trash.

B. Where settling occurs before project correction period elapses, remove finished surfacing, backfill with additional soil material, compact, and reconstruct surfacing.

3.7 PLACE OF DELIVERY

A. The shipment shall be delivered, unloaded, stacked by the contractor at the following location as directed by the COR.

Bureau of Land Management Lower Potomac Field Station 10406 Gunston Road, Lorton, VA 22079

3.8 DISPOSAL OF SURPLUS AND WASTE MATERIALS

A. The contractor shall be responsible for removal of surplus satisfactory soil and waste materials, including unsatisfactory soil, trash, and debris, and legally dispose of them off Government's property.

a. Example of a steel pole-barn pavilion structure.