Lecture 19 TA 101 A Engineering Graphics 2018

Lecture 19 TA 101 A Engineering Graphics 2018 -19 -I By Dr. Mukesh Sharma Professor DEPARTMENT OF CIVIL ENGINEERING INDIAN INSTITUTE OF TECHNOLOGY KANPUR-208016, INDIA

4 H 4 A 3 A A H 3 H EV 2 A 1 A 5 A 2 H TL 2’H 5 H 1 H H F 1 F 2’F 2 F 4 F 5 F 3 F Intersection of a line and plane – EV method

4 H XH 3 H 2 H YH 1 H 5 H H F 1 F YF 4 F 2 F XF 5 F 3 F Check visibility Intersection of Lines and planes – Cutting Plane Method

6 A 3 A 6 H EV 3 H 2 A 2 H 4 A 4 H TL 1 A 7 H 4 H’ 1 H 7 A H A 5 A 5 H H F 6 F 1 F 4 F’ 2 F 4 F 5 F 3 F 7 F Intersection of two planes – Edge View Method

6 H XH 3 H RH 2 H 4 H YH 7 H SH 1 H 5 H H F 6 F 1 F YF SF 2 F 4 F 5 F RF XF 3 F 7 F Intersection of two planes – Cutting Plane Method

900 R 1 A 1 B 1 TL Q 1 P 1 QT CT RT 1 DT H d BT PT AT H F BF PF d DF AF QF RF CF Example: Two Planes given – third plane perpendicular to two planes Draw its Top View if front view and a point n top view given – What is the concept?

e m no r zo ri o H al re c Di l a t n n Pla vie w tio n of Normal view of solid surface e Fro nta l. P n Pla lan e file o r P Applications – Inclined/Oblique Surface on object -Obtain true shape of surface and if necessary project its (inclined plane) features on top and front views

C D A A-C B A B-D B C D Simple problem of inclined surface

C D B A C Normal View D AC Di No recti rm on al of Vie w A BD B A C B D

DE A EV 1 CB H Distance from H transferred here C B H F B 1 2 D TL TL D C E Distance from 1 transferred here C E D E ew Vi l a ) B orm (TS N

4 R 1 4 R 2 R 1 H 3 R 2 5 R 2 EV 5 R 1, 3 R 1 3 H 4 H R 1' 1 R 1, 2 R 1 1 R 2 2 R 2 TL H' 2 H 5 H R 1 R 2 1 H H F 4 H 5 H 3 H 1 H 2 H Reference plane, R 1 Example: True shape of oblique surface and concept of Reference plane