9−31these Specifications. DRY-LAID STONE WALLS
912.01 DESCRIPTION. This work consists of the removal and resetting of existing sections or the
construction of new sections of dry-laid stone walls at locations indicated on the Plans or as directed by the Engineer, all in accordance with these Specifications. Walls will be considered "double faced" unless otherwise noted on the Plans.
912.02 MATERIALS. Stones used to construct new walls shall conform to SECTION M.14;
STONE FOR MASONRY, of these Specifications unless otherwise directed by the Engineer. Stones to be used in walls designated to be removed and reset shall consist of the stones in the present wall and any additional stones required to co mplete the work. Additional stones necessary to complete the wall sections shall conform to existing stones relative to shape, texture, color and geological composition. In the case of existing walls comprised predominantly of flat stones, any additional stones required shall not be less than 3 inches thick, 10 inches wide and 12 inches long in size. For walls comprised mostly of round stones, any additional stones required shall be not less than 9 inches thick, 12 inches wide and 12 inches long in size. Stones that are smaller than these dimensions may be used only for pinning and/or filling interstices within the wall. 912.03 CONSTRUCTION METHODS. 912.03.1 Trenching. Trenches for constructing stone walls shall be excavated to a depth of 12 inches and to a width of 36 inches unless other dimensions are indicated on the Plans or provided by the Engineer. 912.03.2 Laying Stone. The stones shall be laid to line and in courses roughly leveled up. The bottom, or foundation, courses shall be composed of large stones and are to be laid to form a relatively flat surface upon which the succeeding courses may be placed. The open spaces about the foundation (or base) of the wall shall be filled in with suitable material excavated from the trench. All stones shall be laid with bearing beds parallel to the natural bed of the material. Select stones, roughly squared, are to be used at the ends and at angles in the wall. The foundation courses shall consist of the large stones and the thinnest courses shall be placed towards the top of the wall. The stone wall shall have a width of not less than 24 inches and a height of 3 feet above the surrounding ground surface unless otherwise indicated on the Plans. These dimensions may be increased or decreased where necessary to conform with adjoining walls which are to remain in place, all as directed by the Engineer. If, in order to complete the wall, it becomes necessary to use stones other than those which are present in the existing wall, the additional stones shall be used in the foundation and distributed evenly throughout the wall. 9−32 Care must be taken to insure that each stone takes a firm bearing at not less than three separate points upon the underlying course. Open joints shall be chinked and spalls fitted to provide firm bearing throughout the length of the stone. Face joints shall not exceed 1 inch in width unless otherwise directed by the Engineer. Chinki ng will be permitted only in horizontal joints in the faces. The chinking of vertical joints in the faces of the wall will not be permitted. Header stones shall hold in the heart of the wall and must extend not less than 12 inches into the core. They shall occupy not less than one-fourth of the face area of the wall and shall be evenly distributed. Header stones in walls, 2 feet or less in thickness, shall extend entirely through the wall. The top of the wall must be finished flat and shall contain tie stones that extend entirely across the width of the wall. Tie stones shall make up no less than one-fourth of the stones in the course. All stones used in the top course shall have a width of no less than 8 inches and a thickness of at least 3 inches. All excess material shall be removed and disposed of and the work area shall be left in a clean and neat condition satisfactory to the Engineer. 912.04 METHOD OF MEASUREMENT. "Remove and Rebuild New Dry-Laid Stone Walls" or "Construct New Dry-Laid Stone Walls" will be measured by the number of linear feet of continuous runs of those constructed or reconstructed walls actually installed in accordance with the Plans and/or as directed by the Engineer. 912.05 BASIS OF PAYMENT. The accepted quantities of "Remove and Rebuild New Dry-Laid Stone Walls" or "Construct New Dry-Laid Stone Walls" will be paid for at their respective contract unit prices per linear foot as listed in the Proposal. The prices so-stated constitute full and complete compensation for all labor, materials and equipment, and all incidentals required to finish the work, complete in place and accepted by the Engineer. Excavation below the designated slope or subgrade line for the installati on of dry-laid stone walls will be paid for in accordance with SECTION 203; STRUCTURE EXCAVATION AND BACKFILL , of these Specifications. Stones required for the construction of new walls will be included in the contract price for "Construct New Dry-Laid Stone Walls.” Stones prov ided by the Contractor to supplement quantities of existing stones from existing walls to meet the requirements of this Specification will be paid for separately under proposal item, "Supplementary Stones for Walls.” 9−33SECTION 913 TRAFFICPERSONS
913.01 DESCRIPTION. This work consists of providing police officers as deemed necessary by
the Engineer for the direction and c ontrol of both vehicular traffic and pedestrians within the limits of the project, all in accordance with these Specifications.
913.02 QUALIFICATIONS. Police officers shall wear regulation uniforms and should be regular,
reserve or special officers of the communities in which they serve. High-visibility safety apparel should be worn by all police officers providing traffic control. The apparel background (outer) material color shall be either fluorescent orange-red or fluorescent yellow-green, and the retroreflective material shall be either orange, yellow, white, silver, yellow-green, or a fluorescent version of these colors, and shall be visible at a minimum distance of 1000 feet. The retroreflective safety apparel shall be designed to clearly identify the wearer as a person.
913.03 CONSTRUCTION METHODS . Not applicable.
913.04 METHOD OF MEASUREMENT. Services of “Trafficpersons” will be measured for payment
by the number of hours for each person rendering services in accordance with directions of the Engineer. This is to include, however, only such trafficpersons as are employed within either the limits of the construction right-of-way for the project, upon detours stipulated in the Contract; or upon detours ordered by the Engineer. Trafficpersons furnished by the Contractor for continued use of a detour, bypass or temporary traffic control beyond the period for which the Engineer deems such trafficpersons necessary to the proper completion of the project, or at locations where traffic is unnecessarily restricted by the Contractor’s me thod of operation will not be measured for payment.
913.05 BASIS OF PAYMENT. Although services of Uniformed Trafficpersons (with/without
cruisers) will be measured for payment by the num ber of hours for each person rendering services, there is no bid item for this work. Uniformed Trafficpersons (with/without cruisers) shall be paid for based on actual cost as submitted by a bill of lading from the local co mmunity or communities involved and approved by the Engineer. The payment for this work shall be made directly by the State through a separate Purchase Order submitted by the local community or communities. Payment for the Trafficpersons (with/without cruisers) required by the Contractor’s operations beyond the period for which the Engineer deems necessary shall be the Contractor’s responsibility.