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EXHIBIT “A” Attachment to Agreement No. 1213126J-000.620027, dated July 16, 2018 , by and between SPEARHEAD CONSTRUCTION LLC and Skanska Walsh Design-Build JV for Furnish and Install Building Framing and Partitions for Pedestrian Bridge B at LaGuardia Airport Central Terminal Building Replacement Project, New York, LaGuardia Airport Queens, New York . delivery, erection, installation, and close-out to create a single effective process over the time period and duration noted in Exhibit D - Project Schedule. 3. Equipment for Installation: Unless noted otherwise, this Subcontractor includes, but not limited to, all necessary cranes, man lifts, forklifts, scaffolding, welders, platforms or lifts and other equipment or tools required to receive, stage, erect, and install materials, assemblies or systems. Subcontractor includes all Trade labor hours, time, and cost for activities to setup equipment and later remove from jobsite. 4. Mobilization/De-mobilization: Subcontractor includes all costs and activities to provide complete mobilizations to the site and complete de-mobilizations off-site, as required per the schedule of the Project. 5. Include Provisions for Work of Others: Subcontractor to coordinate and include necessary items to insure openings which this Subcontractor’s system pass-through, or additional structural support for system loads, and provisions to work with Architectural, MEP, Life Safety, Security, AV, Doors/ Frames/Finish Hardware, Vertical Transportation, Curtain Wall/ Glass and Specialties installed adjacent to or around this Subcontractor’s systems are included in the Work. 6. Quality Expectations and Plan: (reference Exhibit R ) A. Quality Expectations: Subcontractor will promote Quality within its’ operation and its’ suppliers, subcontractors, manufacturers and others. Subcontractor’s Project execution plan will include means and methods to achieve the necessary quality and to measure success in meeting these expectations. B. Quality Assurance / Specified Mock-ups and Benchmarks: Subcontractor includes requirements to execute and support specified benchmarks in base scope and mock-ups for quality assurance primary to Subcontractor’s Work or secondary support of other trades to assemble mock-ups, if added to Subcontractor’s Work. 7. Building Geometry: Subcontractor to include and consider building geometry when developing details, layouts, means and methods, installations and coordination of its Work with work of other trades. 8. Layout: Subcontractor is responsible for all layout and setting out of lines and levels required for the Work, from control survey benchmarks provided by Contractor. Subcontractor will extend control within the location of its Work for horizontal and vertical control and layout. 9. Logistics: Subcontractor to include the logistics requirements stated in Exhibit X, X-1 , and its logistics plan specific to the building geography to consider and include, but not be limited to, movement of material, manpower, equipment, unloading, delivery and staging within the work area boundaries specific to the building and area of Work.

1.06 SUPPLEMENTAL PROVISIONS OF WORK

1. Guarantee: All Work by this Subcontractor to be guaranteed for the period stated in Exhibit V in compliance with Exhibit E , Section 17 – Warranties and Guarantees. 2. Document Verification: It is Subcontractor’s responsibility to verify that all Contract Documents, drawings, and specifications, as listed or referenced herein, are in fact in the Subcontractor’s possession.

Exhibit A, Page 14 of 18

Scope of Work/Supply and Clarifications/Qualifications

Version 4.0

(06.2006 ed. Rev. 0)