TWO MATERIAL ELASTIC BAR UNDER GRAVITY
    5    4    1    2    1    0    0    1    0    1    2    1    0    1    0    0
    0    0    0    3    0    0    0    0    0    0    8    0    0    0    0    0
 Mesh 1--(1)--2--(2)--3--(3)--4--(4)--5    -->x
 Example in Sections 3.4 and 3.5 with four elements
         1         1 0.
         2         0 210.
         3         0 420.
         4         0 540.
         5         0 660.
    1    1    2
    2    2    3
    3    3    4
    4    4    5
    1    1 0.
    1 30.e6     10.       0.283
    2 30.e6     10.       0.283
    3 13.e6      8.       0.300
    4 13.e6      8.       0.300
    5    1 10000.

DATA HELP FILE: ABOVE PUT TITLE, TWO CONTROL LINES WITH ISAY=6
    M   NE   NG    N      NSEG  LBN     NCURV      ISAY  NRB  NQP     NLTYP
                    NSPAC          NITER     INRHS               LSHAP      MODE
NNPFX     NLPFX     MISFX     NHOMO     NPWRT     NTAP1       NGF     NSFIX
     NNPFL     NLPFL     MISFL     LHOMO     LMWRT     NTAP2     NOCOL     NSFLO
C23456789012345678901234567890123456789012345678901234567890-----------X34567890
