Left thumb rule in levelling.

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Answer 1

Question

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.

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WU Example 6 For the exterior transverse frame of the flat slab floor shown in figure, and by using the Direct Design Method, find: a. Longitudinal distribution of the total static moment at factored loads. b. Lateral distribution of moment at exterior panel (column and middle strip moments at exterior support) D= 6.5 kN/m² L= 5.0 kN/m² تفكر وکھل flat slap ما لا يوجد bon حامل . 3000 1000 5000 160 + 2000+ +2000+ 5000 2608 300 2000 Drop Panal السعف

Example 4 For the transverse interior frame (Frame C) of the flat plate floor with edge beams shown in Figure, by using the Direct Design Method, find: 1) Longitudinal distribution of total static moment at factored loads. 2) Lateral distribution of moment at interior panel (column and middle strip moments atnegative and positive moments). 3) Lateral distribution of moment at exterior panel (column and middle strip moments atnegative and positive moments). Plat 5000-5000 5000 -Frame C لا بوجود deen 0009 0009 Slab thickness = 180 mm, d = 150 mm q₁ = 16.0 kN/m² All edge beams = 250x 500 mm All columns = 500x 500 mm 6000

Answer 2

Question

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.

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Answer 3

Question

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.

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Answer 4

Question

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.

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Answer 5

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.

Answer 6

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.

Answer 7

Chapter 5, Problem 5.1P

To determine

Left thumb rule in levelling.

Answer 8

Expert Solution & Answer

Explanation of Solution

Left thumb rule is applicable in leveling for the measurement of vertical angles. In order to use the instruments effectively we must follow some of the basic principles.

Most of the latest instruments use three screw leveling head for initial rough leveling. In leveling a three-screw head, the telescope is rotated until it is over two screws that is, horizontal to the two screws, and then by using the thumb and the first finger of each hand in order to adjust the opposite screws simultaneously fixing the bubble approximately at the center (if the left thumb is turned to the left as moving right thumb to right it will turn the bubble towards left, similarly moving left thumb to right and right thumb to left will make the bubble to move towards right). The whole procedure is repeated with the telescope at 90^oso that it is over the third remaining screw just opposite the other two. Now, a lot of time gets wasted while adjusting the bubble with the first attempt.A simple rule that assists in centering bubble, as a bubble follows the left thumb rule when turning the screws gets centered by turning the screws one after the other. Furthermore, the inward and outward movement of the foot screws will easily center the instrument and telescope need not to be rotated throughout the process.