448
R. Sharma and V. Tanna
Fig. 4 Foundation of spiral ladder
Fig. 5 Lifting of platform structure
=
5 × W × L
4
/ (384 × E × I )
(2)
Deflection(simply supported, end fixed, point load
=
W × L
3
/(198 × E × I )
(3)
Permissible deflection = L(mm)/240 mmas per BS 5950−1 : 2000
(4)
Permissible bending stress of material
= 0.8 × yield strength of the material as per BS 5950−1 : 2000 Clause 4.3.8)
(5)
R. Sharma and V. Tanna
Fig. 4 Foundation of spiral ladder
Fig. 5 Lifting of platform structure
=
5 × W × L
4
/ (384 × E × I )
(2)
Deflection(simply supported, end fixed, point load
=
W × L
3
/(198 × E × I )
(3)
Permissible deflection = L(mm)/240 mmas per BS 5950−1 : 2000
(4)
Permissible bending stress of material
= 0.8 × yield strength of the material as per BS 5950−1 : 2000 Clause 4.3.8)
(5)