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1 <br />8. Level and grade of exposed lintels, sills, parapets, horizontal grooves <br />and other conspicuous lines: Plus or minus 1/4 inch in 20 feet, not <br />' exceeding plus or minus 1/2 inch in entire length. <br />9. Level and grade of slab soffits, ceilings, beam soffits and rises <br />measured before removal of supporting shores: Plus or minus 1/4 <br />inch in any 10 foot length; 3/8 inch in any 20 foot length; not <br />exceeding 3/4 inch maximum for entire surface. <br />10. Cross sectional dimension of columns, beams and slabs: Plus or <br />minus 1/4 inch, except increase thickness of slabs on grade as <br />necessary to achieve indicated top elevation and slope. <br />11. Thickness of walls: Minus 1/4, plus 1/2 inch. <br />12. Position of linear building lines not otherwise specified and distance <br />from related columns, walls, and partitions: Plus or minus 1/2 inch at <br />all points and not over 1/2 inch in any 20 foot length. <br />13. Rise of Steps: Plus or minus 1/16 inch in consecutive steps and plus <br />or minus 1/8 inch in total rise of flight. <br />14. Tread of Steps: Plus or minus 1/8 inch in consecutive steps and <br />plus or minus 1/4 inch in total flight. <br />15. Location of sleeves, size and location of floor openings and wall <br />openings: Plus or minus 1/4 inch. <br />16. Misplacement of Work Points with respect to theoretical grid position: <br />1/8 inch. <br />F. Sampling and Testing: <br />1. Concrete will be sampled and tested by the Project Testing <br />Laboratory during the placement of concrete as follows: <br />a) Sampling fresh concrete: ASTM C172. <br />b) Slump: ASTM C143; one test for each concrete load at point <br />of discharge or as required and one test for each set of <br />compressive strength test specimens. <br />c) Air content: ASTM C173, volumetric method; one test for <br />each set of compression test specimens. <br />07/06 03300 -3 05 -5564 <br />