geometric characteristics of cross-section
a	b	c	d	e	r
99	99	2	2	1	2
area		9698,72
centroid		49,05	49,63
central inertia moments
Iy	7914636,61
Iz	7760430,29
Iyz	91633,70
principal central inertia moments
I1	7957290,00
I2	7717776,89
angle
tg a	-0,47
a [rad]	-0,44
a [st]	-24,96
principal central inertia radii
i1	28,64
i2	28,21