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Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

Quality Assurance Handbook for Rural Roads Volume-I - pmgsy

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3. Section-1200<br />

(2) Tolerances<br />

1200.1: Tolerances <strong>for</strong> different items in Tables 1200.1 to 1200.3<br />

(i) Construction of Foundations<br />

(a) No point of the bearing surface on which concrete footing is to be laid shall be higher than<br />

the founding level.<br />

(b) Variation in Dimensions : +50 mm<br />

174<br />

: -10 mm<br />

(c) Misplacement from specified position in plan : 15 mm<br />

(d) Surface irregularities measured with 3 m straight edge : 5 mm<br />

(e) Variation of levels at top : ±25 mm<br />

1200.2: Tolerances in Sub-structures<br />

(ii) Sub-Structure<br />

(a) Variation in cross sectional dimensions : +10 mm<br />

: -5 mm<br />

(b) Misplacement from specified position in Plan : 10 mm<br />

(c) Variation of levels at the top : ±10 mm<br />

(d) Surface irregularities measured with 3 m straight edge : 5 mm<br />

(e) Bearing areas : 3 mm<br />

(iii) Superstructure<br />

(a) Variations in overall depth or width : ±5 mm<br />

(b) Variations in overall length and length : Shall not exceed<br />

between bearings ± 10 mm or ± 0.1<br />

percent of span<br />

length whichever is less.<br />

(c) Surface irregularities when measured with<br />

3 m straight edge or template<br />

: 5 mm<br />

3 <strong>Quality</strong> control tests<br />

3.1 Tests prior to construction<br />

(a) Material / Work

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