CIVIL ENGINEERING FORMULAS

FIGURE 2.17 (Continued)

B

B

A

A

x

x

l

l

y

y y

z

h

b

b

y=

b

b

z

y

h

h

3 Px^2

lSsh^2

Rectangle:

width (z) var-

iable, depth

(h) constant

Rectangle:

width (z) var-

iable, depth

(y) variable,

Elevation:

semicubic

parabola

Plan:

two parabolic

curves with

vertices at free

end

Plan:

semicubic

parabola

b=^3 Pl

Ssh^2

y^3 =

3 Px^2

kSsl

z=ky

b=kh

f=^3 P

bE

l

h

h=

3 Pl

kSs

3

3

b 3

h 3

Elevation:

rectangle

Deflection at A:

z=k

y

57