Permissible stress design (in USA construction more commonly called allowable stress design) is a design philosophy used by civil engineers. The designer ensures that the stresses developed in a structure due to service loads do not exceed the elastic limit.
A factor of safety against yield is applied to design stress Yield Stress/ Design Stress = Factor of safety The factor of safety varies for different industries; 1.5 is used in structural steel design for buildings; 1.25 or even 1.1 for aircraft/space systems
stress in old concrete
C8 stress
1400Kgf/cm2
External is out side emotional is in
allowable stress design-2/3rd of yield working stress design is process yield
ultimate stress=Factor of safety*Allowable stress
yield stress is the maximum resistance to deformation per unit area and proof stress is the allowable resistance to deformation per unit area.
allowable bending stress for en8
allowable bending stress for en8
the differences between intonation and stress is the difference . ! :D :D hahahahahaa
A factor of safety against yield is applied to design stress Yield Stress/ Design Stress = Factor of safety The factor of safety varies for different industries; 1.5 is used in structural steel design for buildings; 1.25 or even 1.1 for aircraft/space systems
Depends on temperature.
The maximum allowable stress is that value beyond which, after applying an appropriate factor of safety its particular strength criterion is exceeded and failure occurs. For example, if aluminum strength in yield is 35,000 psi, and factor of safety is 1.25, its maximum allowable stress against yield is 35,000/1.25 = 28,000 psi
stress in old concrete
C8 stress
800n/mm2