Table 4.

Maximum equivalent stresses in the load-bearing elements of the flat car structure at modes 1a, 1b, 1b and 1g according to two loading schemes.

Load-bearing	Stresses, MPa				Permissible stresses, MPa
	Mode 1a		Mode 1b
	1-scheme	2-scheme	1-scheme	2-scheme
Ridge beam	43.2	40.7	31	29	293
Side longitudinal beams	51	52.1	35.3	40
Pivot beam	151.8	150	103.6	116.5
Cross beams	65.5	71.3	52.2	57.9
Diagonal beams	106.7	111	73.2	86.8	276
End beams	39.5	36.2	28.4	26.1	293

	Mode 1v		Mode 1g
Ridge beam	31	29.5	24	23.6	293
Side longitudinal beams	35.3	22.1	18.6	16.9
Pivot beam	103.6	77.8	69.7	63.4
Cross beams	52.2	82.4	58.7	76.7
Diagonal beams	73.2	34.4	35	28.7	276
End beams	28.4	24.7	20.7	19.7	293