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PART 2 PRODUCTS <br /> 2.1 REMOVABLE FORMS <br /> A. Forms for Unexposed Finish Concrete: Form concrete surfaces which will be unexposed <br /> in finished structure with plywood,lumber,metal or other acceptable material. Provide <br /> lumber dressed on at least 2 edges and one side for tight fit. <br /> B. Backing for Forms: Structurally sound lumber,solid, straight and free of defects that may <br /> impair its strength. <br /> C. Forms for Exposed Finish Concrete: Construct formwork for exposed concrete surfaces <br /> with plywood,metal,metal-framed plywood faced or other acceptable panel-type <br /> materials,to provide continuous,straight,smooth,exposed surfaces. Furnish in largest <br /> practicable sizes to minimize number of joints and to conform to joint system shown on <br /> drawings. Provide form material with sufficient thickness to withstand pressure of newly- <br /> placed concrete without bow or deflection. Form corners with 3/4 inch by 3/4 inch <br /> chamfer strips,mitered at changes in direction. <br /> 2.2 ACCESSORIES FOR REMOVABLE FORMS <br /> A. Form Ties: Factory-fabricated,adjustable-length,removable or snap-off metal form ties, <br /> adequate to prevent form deflection,and to prevent spoiling concrete surfaces upon <br /> removal. Provide ties so that portion remaining within concrete after removal of exterior <br /> parts is at least 1 inch from outer concrete surface. Spreader cones on ties shall not be <br /> larger than 1 inch in diameter. At exposed finish concrete provide form ties with plastic <br /> cones and plastic setback plugs,color as selected,with equal spacing in horizontal and <br /> vertical line. <br /> B. Chamfer and Reveal or Recess Strips: PVC or wood strips. Triangular chamfer strips <br /> shall be 3/4 inch by 3/4 inch. Round chamfer strips shall have 3/4 inch radius. Size <br /> reveal or recess strips as noted. Wood strips shall have planed faces. <br /> C. Form Coatings: Form-coating compounds that will not bond with,stain,nor adversely <br /> affect concrete surfaces,and will not impair subsequent treatment of surfaces requiring <br /> bond or adhesion,nor impede wetting of surfaces to be cured with water or curing <br /> compounds. <br /> PART 3 EXECUTION <br /> 3.1 DESIGN <br /> A. Removable Forms: Design for vertical and lateral loads and pressures outlined in the ACI <br /> Standard"Recommended Practice for Concrete Formwork" (ACI 347). <br /> B. Tolerances: Design removable forms to insure completed work within allowable <br /> tolerances specified. <br /> ADDENDUM#1 <br /> 1607.001 -ORONO ICE ARENA (CP-2) Page 03100-2 <br />