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1 C. Thoroughly remove all dirt, mortar, and foreign matter before each use. Where the bottom ,
<br /> 2 of the form is inaccessible from within, provide access panels to permit thorough removal of
<br /> 3 extraneous material before placing concrete.
<br /> a ,s D. Kert wood forms inserted for architectural treatment to accommodate swelling without
<br /> 6 pressure on the concrete.
<br /> s E. Chamfer all exposed horizontal and vertical edges or other corners 3/4-inch, both interior and
<br /> s exterior of structures.
<br /> 10
<br /> >> F. Earth trench forms for walls and footings below existing and final grades may be used, if
<br /> 12 approved after inspection of the trenches, provided the sides are clean, even, vertical, true,
<br /> 13 and provided the bottoms are level, clean, and without fill, and the width is increased two
<br /> is (2) inches. ,
<br /> 15
<br /> 16 G. Where tolerances are not shown elsewhere, permissible deviations from established lines,
<br /> 17 grades, and dimensions are listed below:
<br /> is
<br /> 19 1. Variation from the Plumb:
<br /> 20
<br /> 21 a. In the lines and surfaces of columns, piers, walls and in arises: in 10 feet, 1/4-inch; '
<br /> 22 in any story or 20 feet maximum, 3/8-inch; in 40 feet or more, 3/4-inch.
<br /> 23
<br /> 24 b. For exposed corners and other conspicuous lines: in any bay or 20 feet maximum, '
<br /> 25 1/4-inch; in 40 feet or more, 1/2-inch.
<br /> 26
<br /> 27 2. Variation from the Level or from the Grades Shown:
<br /> 2e
<br /> zs a. In floors, ceilings, and beam soffits: in 10 feet, 1/4-inch; in any bay or 20 feet
<br /> 30 maximum, 3/8-inch; in 40 feet or more, 3/4-inch, in floors to receive tile, maximum
<br /> 31 of 1/8" in 10 feet.
<br /> 32
<br /> 33 b. For exposed lintels, sills, parapets, horizontal grooves and other conspicuous lines:
<br /> 34 in any bay or 20 feet maximum, 1/4-inch; in 40 feet or more, 1/2-inch. ,
<br /> 35
<br /> 36 3. Variation of the linear building lines from established position in plan and related position
<br /> 37 of columns, walls and partitions: In any bay or 20 feet maximum, 1/2-inch; in 40 feet or
<br /> 36 more, 1-inch. '
<br /> 39
<br /> 40 4. Variation in the sizes and locations of sleeves, floor openings and wall openings:
<br /> 41 1/4-inch.
<br /> 42
<br /> 43 S. Variation in cross-sectional dimensions of columns, beams and piers, and in the
<br /> 44 thickness of slabs and walls: minus, 1/4-inch; plus, 1/2-inch.
<br /> 45
<br /> as 6. Footings:
<br /> 47
<br /> as a. Variation in dimensions in plan: minus, 1/2-inch; plus, 2-inch. ,
<br /> as
<br /> 50 b. Misplacement or eccentricity: 2 percent of the footing width in the direction of
<br /> 51 misplacement but not more than 2 inches.
<br /> sz '
<br /> CONCRETE
<br /> 042894 03100-10
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