Question

(a) Calculate the formation heights of a longitudinal section, at each stake value point. (6) The final ground elevations where obtained as given in the table below The formation line is a straight line passing through the ground elevation at SVoo and has a slope of-1 ,470% towards SV 140. Slope = -1.47096 t difference per 20 m ght difference per-.- m- STAKE VALUE Final Ground Height (GH) Formation Hei 108,187 107,049 108,187 20 107.215 106,894 60 80 100 120 106,361 106,439 106,716 107 140 CHECK: FHs (b) Without drawing the longitudinal section calculate the optimal horizontal and vertical scales to draw the longitudinal section at the largest horizontal and vertical scale on an A4 page making provision for the normal data rows below the section. Horizontal Vertical Ground distance SV.... to SV.... Ground distance- m The height difference between the hi and lowest Ground distance = Ground distance mPlan distaScale denominator Ground distancem,m Plan distance (x)- Scale denominator (x)mm = (x)mm A4 Horizontal side lengt Subtract 20 mm for titles: Vertical side length 20 mm | Subtract 1 row of 10 mm and 4 of 15mm mm Horizontal plan distance(x)m Hor plan distance xmm- distance Xmm Hor scale denominator Vert scale denominator ,'" Horizontal scale denominator = Vertical scale denominator = Horizontal scale denominator- Round both scales to the next multiple of 50 Or nearest available smaller natural scale Vertical scale denominator- Use harizontal scale-(nearest available natural scale) Use vertical scale 1 (nearest available natural scale)

Answer 1

3- a Formbon height (FH) is the ele vohus of fornch.on line en h?rh ト63ses -hrumh_phゃ gtourf elevoton at sYA and has a slope cf-1470% Stope(470/. aoY、 Hery ht Kloo Sv2o-. ·for globe (%) ~ Cr (07599 m Slope (7.):-1470 % Height, x 100 So (07305m

fom,chon height CFW) af SV,6-108 189 --l'A6 fuma hen height (FH) CYt Sv 108189.-1470 100 5V 4.6 1 og 189 106129 m FH 2 2058 m

Hente, covec 08197 0819 o 893 o 7-049 0 o75 o72 15 0 60 to6344 To 7 305 ↑06361 Bo 100 (o$7 17 o 6316 1o6423 o7 3 04 140