Safety factor characteristics - N1
A = quality of materials, workmanship, maintenance
B = control over applied loads
C = accuracy of stress analysis, experiment, experience
(VG = Very Good, G = Good, F = Fair, P = Poor)
		B =
Characteristic		VG	G	F	P
A = VG	C = VG	1,10	1,30	1,50	1,70
	C = G	1,20	1,45	1,70	1,95
	C = F	1,30	1,60	1,90	2,20
	C = P	1,40	1,75	2,10	2,45
A = G	C = VG	1,30	1,55	1,80	2,05
	C = G	1,45	1,75	2,05	2,35
	C = F	1,60	1,95	2,30	2,65
	C = P	1,75	2,15	2,55	2,95
A = F	C = VG	1,50	1,80	2,10	2,40
	C = G	1,70	2,05	2,40	2,75
	C = F	1,90	2,30	2,70	3,10
	C = P	2,10	2,55	3,00	3,45
A = P	C = VG	1,70	2,15	2,40	2,75
	C = G	1,95	2,35	2,75	3,15
	C = F	2,20	2,65	3,10	3,55
	C = P	2,45	2,95	3,45	3,95
Safety factor characteristics - N2
D = danger to people
E = economic impact
(VS = Very Serious, S = Serious, NS = Not Serious)
			E =
Characteristic			NS	S	VS
D = NS			1,0	1,0	1,2
D = S			1,2	1,3	1,4
D = VS			1,4	1,5	1,6