Model ANOVA: de relació entre les activitats extraescolars dutes a terme durant l'etapa d'escolarització

2.1 BARRIERS AND BARRICADES

A. Provide barriers to prevent unauthorized entry to construction areas to allow for Owner's use of site, and to protect existing facilities and adjacent properties from damage from construction operations.

1. Comply with standards and code requirements for erection of structurally adequate barriers.

2. Install barriers of a neat and uniform appearance.

3. Provide graphics and signs warning of the hazard being protected against. 4. Where appropriate and needed provide lighting, including flashing red or

amber lights.

5. Provide barriers at public rights-of-way and for public access to existing buildings when adjacent to construction operations.

B. Provide barricades with blinking beacon light at all open trenches and other excavations.

C. Provide protection as specified below for plant life designated to remain. D. Protect non-owned vehicular traffic, stored materials, site and structures from

damage.

2.2 TEMPORARY CONSTRUCTION FENCING

A. Prior to any excavation work the Contractor shall provide temporary construction fencing as shown on the Drawings and/or as required to completely protect the work area and injury to persons or property.

B. The Contractor shall furnish and install temporary fencing of the following type in all areas where existing fencing lengths are inadequate to enclose the construction. 1. Chain link fencing, six feet (6') high min., fabricated from No. 9 gauge

galvanized wire woven in a 2" diamond mesh with top salvage and having galvanized steel H or pipe intermediate and terminal posts. Post spacing shall not exceed eight feet (8’) on center. Cross bracing, reinforcing gates and other parts of fencing shall conform to standard Specifications of the National Chain Link Manufacturers Association. All posts shall be set into temporary concrete footings or on temporary chain link fencing stands as approved by the Landscape Architect.

C. The Contractor shall furnish and install matching gates equipped with suitable locks and other hardware where necessary to provide access for construction apparatus or

fire fighting equipment. The Owner shall be provided with a copy of the key used for all locks.

2.3 TEMPORARY WORK IN PUBLIC WAYS

A. Prior to commencing any work in public ways and other areas which are legally used by vehicles or pedestrians, the Contractor shall submit in writing the proposed methods of protection to the Official. Work shall not be commenced in these areas until written approval is received from the Official.

B. In general, all excavations in public ways shall be protected by substantial barriers which will offer complete protection against accidents for pedestrian and vehicular traffic without interrupting the normal flow of traffic. All barriers must be properly lighted with electric or battery powered safety lights and must be maintained in good working order by the Contractor for the duration of the time such barriers are

required.

C. Trenches across sidewalks shall be completely covered with a temporary walkway, comprised of properly supported nominal 2" thick lumber laid with butt joints and covered with exterior grade plywood, 1/2" minimum thickness. Provide continuous 2" x 4" rails and posts secured to the temporary walkway conforming to the

requirements of the Occupational Safety and Health Act (OSHA).

D. Wherever temporary chutes are to be extended over sidewalks or other pedestrian or vehicular traffic areas, the bottom and sides of the chutes shall be provided with continuous dustproof and weatherproof lining, applied to the exterior surfaces. E. The Contractor will be required to furnish, install, and maintain in good condition, at

no increase in Contract Price or Contract Time, all other safety measures which in the judgment of the Official are required to protect the public from accidents due to work performed under this Contract. This requirement is supplementary to the Contractor's rights and obligations to provide and employ safety measures as s/he may deem necessary or as may be required by law or standard safety practices.

2.4 TREE PROTECTION FENCING

A. Where indicated on the Drawings or as specified elsewhere, tree protection fencing shall be installed to protect existing trees to remain, in accordance with 01 57 00 and 02 41 00, and with the Details shown on the Drawings.

B. Tree Protection Materials (if not otherwise specified elsewhere):

1. Posts: 2 inch by 4 inch pressure treated wood spaced 5' on center.

2. Fencing: Shall be a heavy-duty bright orange 2.5”-max diamond-mesh HDPE safety/barrier fence with tensile strength of at least 250 lb/ft, 4'-0” high, with smooth upper and lower edges, “Sentry HD” by Tenax of Baltimore, MD or Approved Equal. Fencing shall be stapled with construction-grade staples to each post at a minimum of 3 locations.

3. Exposed height above grade: 4 feet. 4. Minimum post embedment: 18 inches.

5. Stake or spray layout of all proposed work under the driplines of existing trees for approval before beginning construction. Install fencing over the greatest extent feasible within the driplines of the trees, allowing for the work.

Construction Documents Elm Street, Somerville, MA PART 3 - EXECUTION

3.1 BARRIERS, BARRICADES AND ENCLOSURES

A. Install temporary items as specified herein and in the Drawings or, where not specified, to level of quality suitable for the intended purpose as judged by the Project Consultant.

3.2 REMOVAL OF TEMPORARY BARRIERS, ENCLOSURES AND PROTECTIONS

A. Remove temporary barriers, barricades, fencing, enclosures and protections as warranted by the progress of the Work and prior to Substantial Completion.

B. Remove in-ground elements of all temporary barrier installations (if any) completely. Grade site as noted.

C. Clean and repair damage caused by installation or use of temporary work.

D. Restore existing facilities used during construction to original condition at start of work or as specified elsewhere in the Contract Documents.

END OF SECTION

SECTION 01 57 00

ENVIRONMENTAL PROTECTIONS