L/EI

L/2EI

L/3EI

L/4EI

2

3

4

unrestricted

vertical direction

horizontal direction

inclined direction

the direction in which the deflection is required

only (i)

(i)and(ii)

(ii) and (iii)

(i), (ii) and (iii)

the beam is prismatic

there is no settlement of supports

there is no discontinuity such as hinges within the span

the spans are equal