CIVIL ENGINEERING FORMULAS

FIGURE 2.17 (Continued)

P

C

C

AB

b

P

x x

P

b

y= x

x

b

y

x

y

3 P

Ssh^2

Rectangle:

width (y) vari-

able, depth

(h) constant

Rectangle:

width (b) con-

stant, depth

(y or y 1 )

variable

Elevation:

two parabolas,

vertices at

points of support

Plan:

two triangles,

vertices at

points of support

Plan:

rectangle

b=^3 Pl

2 Ssh^2

y^2 =

6 P(l–p)

blSs

6 P(l–p)p

blSs

y 12 =^6 Ppx 1

blSs

f=^3 Pl

3

8 Ebh^3

h=

h

h h

l – p

y y^1 y

l

2

Elevation:

rectangle

h 2 h 2

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