 I am P. V. Ekhande, working as an assistant professor in Department of Mechanical Engineering at Walsh Institute of Technology, Swalapur. So, today we are going to consider the problems related to the projection of planes. At the end of this session, the students will be able to complete the projections of plane when strike and dip of the plane is given. After referring the figure, we have to draw the front view or we have to complete the front view. That is nothing but the completion of projection and the plane ABC for that strike is given as a south-sixty west and dip of the plane is 45 degrees north-westerly and W means that is north-westerly. When we consider the given figure for that the top view has been given as a A H B H C H and for this plane ABC in the front view, the point A F is given means corner A of the plane is given, its position is given. Now, what is the first step? The first step is to complete the strike line in the top view. So, strike line or the strike of the plane has been given as a south-sixty west. So, we will consider the point A with respect to that where to locate the strike line, where to complete the strike line for that the directions we will consider over here as a north-south which is a vertical line and the horizontal line. That horizontal line is west-east, these are the four principal directions, so this direction is west whereas this direction is north and this is east and the direction in the downward side that is a south, so S is the letter which is to be used for that purpose. Now, the strike of the plane is south-sixty west, so in the quadrant third or from south towards west the angle is 60 degrees. So, this 60 degrees angle must be considered with vertical line whatever the angle is given for the strike. So, that strike line is to be completed as a bearing with respect to this vertical line and that is nothing but the horizontal line from the plane which is indicating to length in the top view. Now, this strike line will complete first with respect to the A position which is at given 60 degrees angle, so angle given for that is 60 degrees, so we will consider the point at 60 degrees and with respect to that we will complete the strike line. The angle which we have considered over here is 60 degrees which is a bearing for this line or that line is nothing but a strike of the plane or strike line of the plane, so this line is a strike line. Now, we have to complete the edge of the plane and for that purpose the another data which is given over here, so that is deep angle a 45 degrees angle and the direction is north-westerly. So, this direction north-westerly that is to be indicated in the top view only as a line perpendicular to the strike line and in that direction the plane should have the downward inclination. So, downward inclination should be in this direction because that is the deep direction given means the plane will be having dipping towards the ground in that direction. So, we will consider the deep direction over here, so this deep direction as a line perpendicular to this we will complete over here, so this line is the indication of deep direction and to complete the issue of the plane the procedure is to take the plane perpendicular to this strike line and when we take the plane perpendicular to two length line or the strike line we will get the edge of the plane on the adjacent side and for that purpose according to procedure we have to complete the projectors as a line perpendicular to this reference line. So, this perpendicular line which is taken over here as a reference line is to be indicated as a H 1 reference line because that is intersection of horizontal plane and auxiliary plane number 1 on which we are getting the edge of the plane. Now here the distance of a point is to be taken, so a point which is at the distance over here so that distance will take in compass and from that distance will mark the point on this projector. So, the distance which is over here is 34 millimeter, so this 34 millimeter distance will mark on this projector which is giving us the position of the point A 1. So, when we transfer the distance from this it will give us the position of A 1. Now the line 45 degrees which is a deep line that is to be considered at 45 degrees angle with respect to horizontal line over here or the line which is parallel to HRP or this HRP is nothing but the ground plane also. So, we can consider ground plane to which we will consider the line parallel and with respect to that the angle is to be taken as a 45 degrees. Here the angle is 45 degrees, so it does not matter because it may be 45 degrees at this location or it will be at this location. But remember that the indication should be with respect to this line only. So, we take the angle 45 degrees and on that line we will show the angle for the deep. So, this angle is deep angle 45 degrees and we are taken the downward inclination on this side. The reason as told to you the deep direction which is given is in the north westerly direction that is why we are taking the angle in this area in this side to have the condition fulfillment. Now to get the remaining two points where to project the points C H and B H from the top you to obtain C 1 and B 1. So, C 1 and B 1 we can obtain by considering the projectors of C point and B point. Now the intersection which is obtained over here is a C 1 and B 1. So, these are the remaining two corner points and the length B 1 to C 1 is H u of the plane. Length C 1 to E 1 is H u of the plane and with respect to this H u then we are going to complete the front view and for that purpose from the top view we are to first project the points in the front view region and on these projectors we are going to transfer the distance of C 1 and distance of B 1. Now this is the projector of C this is the projector of B on which we will get the position of B f and C f. For C f we are going to transfer this distance the distance over here is 20 millimetre. So, on C projector we will take the 20 millimetre distance and that is position of C f point. Similarly for B H projector we have the distance over here as a 47 millimetre. So, which you can take in the compass and this distance we are to transfer on this side because whatever the distances which are going to be transferred over there are the distances from this H 1 plane. As per the rule we are leaving one view between two reference lines and then transferring the distance. So, this distance which is a distance 42 millimetre that 42 millimetre distance we will take over here. So, you can use the compass for that and the marking of the point will be over here as a B f point. So, this distance is distance equal to 42 from this side. After that we have to connect these three points to complete the front view of the plane. So, this triangle is a triangle which is indicating the front view and the given figure was a top view. So, this completes the projections of plane when the strike and the dip of the plane is given. Have you understood the procedure of this? Thank you.