Stub Setting

May 5th, 2015
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After the location marking has been done, the marking of the pits for excavation for the foundation of the location is carried out. This is based on the specific foundation drawing of the type and make of the tower which is to be erected at that location.

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Stub SettingCHAPTER 4STUB SETTING1.01.1EXCAVATION PIT MARKING:After the location marking has been done, the marking of the pits for excavation for the foundation of the location is carried out. This is based on the specific foundation drawing of the type and make of the tower which is to be erected at that location.1.2The tower legs, footings and faces are designated as shown in the drawing below.1.3The pit marking shall be carried out according to the pit marking drawing which is prepared from the foundation drawing of the tower. The size of the pit, in case of open cut foundations, is worked out by adding 150 mm to the sides of the base pad on all the four sides for allowing working space. No margin is necessary in case of undercut foundations.1.4The excavation pit marking drawing indicates the distance of centres, sides and corners of the pits with reference to the centre point of the tower. These distances are measured and each pit boundary is marked in the field by means of spade or pick axe along the sides of the pit.68Construction Manual for Transmission Lines1.5A typical excavation pit marking drawing is given below.1.6From the dimensions shown in the drawing, the triangle ABC is first marked with the help of a measuring tape. The distance CD, equal to F (width of the pit) is marked on the ground. The triangle AB'C is then marked by shifting the point B and without changing the points A and C. The distance CD', equal to F, is th

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