Adds springs at relative positions to constrain the buildplate
*FIAT r11, r12, r13, r14, i11, i12, i13, i14, i15 r21, r22, r23, r24, i21, i22, i23, i24, i25 ...
r11: r*8: patch x length
r12: r*8: patch y width
r13: r*8: distance from x edge
r14: r*8: distance from y edge
i11: i*4: x-coordinate [0 for free, 1 to add spring]
i12: i*4: y-coordinate [0 for free, 1 to add spring]
i13: i*4: z-coordinate [0 for free, 1 to add spring]
i14: i*4: material ID
i15: i*4: load case number
The *FIAT card is similar to *FISR, except it takes rectangular length and width dimensions, and a relative position with respect to the edge of the substrate, instead of absolute x and y coordinates like *FISR.