A tape was exactly 30 m long at 20? when placed on the flat under a pull of 75 kN. A survey line was measured with this tape under a pull of 120 kN and found 810 m. The average temperature during the measurement was 30?. If the tape was supported in spans of one tape length each time, determine the corrected length of the tape. The cross-sectional area of the tape is 4mm2. The unit weight of the material of the tape is 7.8 × 10-5 N/mm3. The modulus of elasticity of the tape material is 2.1 × 105 N/mm2. The coefficient of linear expansion of the tape material is 11.7 × 10-6 /?.
Note: We need to consider the correction for sag also along with other corrections.

Add a Comment