CIVIL ENGINEERING FORMULAS

B A

P

C

x

x

l

l

y

y

d

y^3 = x^2

x

d

b

y

y h h

16 P

πlSs

Rectangle:

width (b) con-

stant, depth

(y) variable

Elevation:

two parabolas,

vertices at

points of support

Plan:

semicubic

parabola

Plan:

rectangle

d=

16 Pl

πSs

3

y=

3 P

Ssb

h=

3 Pl

2 bSs

d 3

l

2

Beam

2. Fixed at One End, Load P Uniformly Distributed Over l


3. Supported at Both Ends, Load P Concentrated at PointC

Cross section

Circle:

diam (y)

variable

Formulas

Elevation

and plan

Elevation

semicubic

parabola

f= P

2 Eb

l

h

3

58