Vol 2 - Garney Construction

E. Lifting and Setting Panels in Position:3.03 PATCHING1. Caution: Walls or panels are not stable in themselves against lateralloads, such as wind until construction is complete. Provide bracing asrequired.2. Do not move panels until concrete has obtained the design field strengthrequired by design calculation for handling stresses, including impact.Field strength shall be determined by test cylinders.3. Pickup Lines: Provide equal lifting force at panel pickup points, appliedsimultaneously and acting at right angles to panel.4. Excessive Stresses or Shock Loading: Prevent when lifting panel fromcasting surface, consider form suction and impact using Part 5 of PCIMNL-120 Design Handbook.5. Lifting Equipment: Of size and capacity to prevent damage to panel.6. Set panels on carefully leveled shims.7. Position, plumb and align true to line, and brace securely.8. Bottom Joint Space: Fill with nonshrink nonmetallic grout as shown andas specified in Section 03 62 00, Nonshrink Grouting, as soon as panelsare placed and braced.9. Insert Holes: Fill with nonshrink nonmetallic grout.10. Holes in Exposed Surfaces: Patch to match adjacent surfaces.11. Make welded connections.A. Mix and place patching mixture to match color and texture of surroundingconcrete and to minimize shrinkage.B. Demonstrate patching method and obtain acceptance and approval.3.04 CLEANINGA. After installation, clean soiled precast concrete surfaces with detergent andwater, using fiber brush and sponge.B. Use acid solution only to clean particularly stubborn stains after moreconservative methods have been tried unsuccessfully.C. Use extreme care to prevent damage to precast concrete surfaces and toadjacent materials.D. Rinse thoroughly with clean water immediately after using cleaner.PW/WBG/382059PRECAST CONCRETEAUGUST 15, 2012 03 40 00 - 7©COPYRIGHT 2012 CH2M HILL