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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 .

16. Fabricate GFRG units in lengths and sizes that will minimize number of joints between abutting units. Contractor is responsible for installing GFRG panels straight and true within 1/8 in in 8 linear feet in accordance to ASTM C1467.

G. Spec Section 05400 – Cold-Formed Metal Framing - Subcontractor will furnish and install interior cold formed metal framing at locations in the Contract Documents and per the Project specifications including, but not limited to: 1. Subcontractor shall furnish and install structural load bearing framing and non- structural framing systems, steel studs and runners, deflection track, firestop track, strap / metal backing, channel bridging, hat channels, furring channels, and all required accessories including, but not limited to, all, screws, fasteners, gaskets, spacers, steel backing, ceiling brackets, and other accessories in accordance with. 2. Subcontractor shall furnish and install cold formed framing including steel studs, steel track, steel headers, and all framing accessories, clips, fasteners, anchors, shims, gaskets and other miscellaneous materials per specification 05400. 3. This Subcontractor shall also furnish and install light gauge framing and sheathing required to support expansion joints at Headhouse and Concourse B. 4. Subcontractor must provide LEED action submittals for Gypsum board assemblies. 5. Subcontractor shall provide delegated design by a qualified Professional Engineer. 6. Subcontractor shall be responsible for structural performance. Provide cold-formed metal framing capable of withstanding design loads within limits and under conditions indicated in the contract specifications, drawings, and Contract Documents including, but not limited to design loads, deflection limits, movement, and construction tolerances. 7. Cold-formed metal framing and accessories shall be fabricated plumb, square and true to line and with connections securely fastened according to AISI’s specifications and standards, manufacturers written instructions and as required by Contract Documents, drawings and specifications. 8. Subcontractor shall furnish and install all continuous angles, supplementary framing, beam clamps, or tracks to structural members indicated to receive sprayed-resistive materials before spray resistive materials are applied 9. Subcontractor shall furnish and install cold-formed steel framing according to the contact specifications and manufacturers written instructions unless more stringent requirements are indicated. 10. Install cold-formed metal framing and accessories plumb, square, and true to line, and with connections securely fastened. H. Spec Section 09290 – Gypsum Board Assemblies - Subcontractor will furnish and install Gypsum Board Assemblies at locations in the Contract Documents and per the Project specifications including, but not limited to: 1. Subcontractor shall furnish and install all load and non-load bearing steel framing members for interior gypsum board assemblies. 2. Subcontractor shall furnish and install suspension systems for all interior gypsum ceilings and soffits for Pedestrian Bridge B at all Levels for Public Areas.

Exhibit A, Page 7 of 18

Scope of Work/Supply and Clarifications/Qualifications

Version 4.0

(06.2006 ed. Rev. 0)