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How was the sum of  angles received? How was the closure error calculated?

How was the sum of  angles received? How was the closure error calculated?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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How was the sum of  angles received? How was the closure error calculated?

PT # A C PT # B A @B/ B$ @A/ HI-4.61 / HR= 4.96 SD HD /00-00-00 SET / 90-27-26/ 61.076 -0.486/ 61.074 86-34-16 /98.460/ 5.890 / 98.284 /38-15-41 HA ㅈ A @C/ BS @B/HI=4.51/ HR=4.96 VA HA VA HD /00-00-00 SET/ 90-57-24/ 98.414/-5.076 / 98.294 /36-54-51 / 95-21-56 /63.256/ -5.914 / 62.978 VD SD HA VD @A/ BS @C/HI= 4.64/ HR=4.96 PT # VA SD VD HD C /00-00-00 SET / 83-55-17/ 63.328 / 6.698 / 62.972 B /104-49-20 / 88-54-27 /61.086 / 1.164 / 61.074 A B 38-15-41 C 36-54-51 A 104-49-20 sum L's 179-59-52 Expected (N-2) x 180 180° Closure error = Measured - Known CE=(179-59-52) - (180) -00-00-08 ASSUME ELEVATION OF HUB B 950.00' C
Transcribed Image Text:PT # A C PT # B A @B/ B$ @A/ HI-4.61 / HR= 4.96 SD HD /00-00-00 SET / 90-27-26/ 61.076 -0.486/ 61.074 86-34-16 /98.460/ 5.890 / 98.284 /38-15-41 HA ㅈ A @C/ BS @B/HI=4.51/ HR=4.96 VA HA VA HD /00-00-00 SET/ 90-57-24/ 98.414/-5.076 / 98.294 /36-54-51 / 95-21-56 /63.256/ -5.914 / 62.978 VD SD HA VD @A/ BS @C/HI= 4.64/ HR=4.96 PT # VA SD VD HD C /00-00-00 SET / 83-55-17/ 63.328 / 6.698 / 62.972 B /104-49-20 / 88-54-27 /61.086 / 1.164 / 61.074 A B 38-15-41 C 36-54-51 A 104-49-20 sum L's 179-59-52 Expected (N-2) x 180 180° Closure error = Measured - Known CE=(179-59-52) - (180) -00-00-08 ASSUME ELEVATION OF HUB B 950.00' C
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Step 1

Given:

3 angles of a triangle 

Required:

Calculate sum of measured angle and also find closure error

 

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