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Eight-stage Tensegrity Arch Datasheet


Copyright © 2003, 2004 by Bob Burkhardt

        Member Descriptions
        [name, end point names, weight (if in objective function),
        second power of length (if a constraint), member category,
        Obj/Con/Exc (put in objective function, use as a constraint or
        exclude from computations), flags]
        For assembly purposes, only the name and end point names are
        of interest.  The other information may be of interest after
        A Practical Guide to Tensegrity Design has been consulted.

<Member> strut0103a pt01A pt03c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0204a pt02A pt04a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0305a pt03A pt05c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0406a pt04A pt06a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0507a pt05A pt07c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0608a pt06A pt08a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0709a pt07A pt09c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0810a pt08A pt10a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *

<Member> baseta  pt01A pt01B 0.0 sqr(1.5) 10 Con *
<Member> apexta  pt10a pt10b 0.0 sqr(1.5) 10 Con *

<Member> guy0a   pt01A pt02A 0.32*1.4622 0.0 7 Obj *
<Member> guy1a   pt01A pt03b 0.32*1.4622 0.0 7 Obj *
<Member> guy2a   pt02A pt04b 0.54*1.4622 0.0 7 Obj *
<Member> guy3a   pt03A pt05b 0.54      0.0 3 Obj *
<Member> guy4a   pt04A pt06b 0.54/1.4622 0.0 7 Obj *
<Member> guy5a   pt05A pt07b 0.54/1.4622 0.0 7 Obj *
<Member> guy6a   pt06A pt08b 0.54      0.0 3 Obj *
<Member> guy7a   pt07A pt09b 0.54*1.65 0.0 7 Obj *
<Member> guy8a   pt08A pt10b 0.32*1.65 + 0.32 0.0 7 Obj *
<Member> guy9a   pt09a pt10b 0.32      0.0 3 Obj *

<Member> TL0102a   pt01A pt02B 0.55 0.0      4 Obj *
<Member> TS0203a   pt02A pt03b 1.59 + 0.03 0.0      2 Obj *
<Member> TL0203a   pt02A pt03A 0.55 0.0      4 Exc *
<Member> tS0203a   pt02A pt03a 1.59 + 0.03 0.0      2 Obj *
<Member> TS0304a   pt03A pt04a 1.59 0.0      2 Obj *
<Member> tT0303a   pt03A pt03a 0.60 0.0      2 Obj *
<Member> TL0304a   pt03A pt04B 0.55 0.0      4 Exc *
<Member> tS0304a   pt03A pt04b 1.59 0.0      2 Obj *
<Member> tL0304a   pt03a pt04a 0.55 0.0      4 Exc *
<Member> TS0405a   pt04A pt05a 1.59 0.0      2 Obj *
<Member> tT0404a   pt04A pt04a 0.60/1.4622 0.0 7 Obj *
<Member> TL0405a   pt04A pt05A 0.55 0.0      4 Exc *
<Member> tS0405a   pt04A pt05b 1.59 0.0      2 Obj *
<Member> tL0405a   pt04a pt05b 0.55 0.0      4 Exc *
<Member> TS0506a   pt05A pt06a 1.59 0.0      2 Obj *
<Member> tT0505a   pt05A pt05a 0.60/1.4622 0.0 7 Obj *
<Member> TL0506a   pt05A pt06B 0.55 0.0      4 Exc *
<Member> tS0506a   pt05A pt06b 1.59 0.0      2 Obj *
<Member> tL0506a   pt05a pt06a 0.55 0.0      4 Exc *
<Member> TS0607a   pt06A pt07a 1.59 0.0      2 Obj *
<Member> tT0606a   pt06A pt06a 0.60 0.0      2 Obj *
<Member> TL0607a   pt06A pt07A 0.55 0.0      4 Exc *
<Member> tS0607a   pt06A pt07b 1.59 0.0      2 Obj *
<Member> tL0607a   pt06a pt07b 0.55 0.0      4 Exc *
<Member> TS0708a   pt07A pt08a 1.59 0.0      2 Obj *
<Member> tT0707a   pt07A pt07a 0.60*1.4622 0.0 7 Obj *
<Member> TL0708a   pt07A pt08B 0.55 0.0      4 Exc *
<Member> tS0708a   pt07A pt08b 1.59 0.0      2 Obj *
<Member> tL0708a   pt07a pt08a 0.55 0.0      4 Exc *
<Member> TS0809a   pt08A pt09b 1.59 0.0      2 Obj *
<Member> tT0808a   pt08A pt08a 0.60*1.65 0.0 7 Obj *
<Member> tS0809a   pt08A pt09a 1.59 0.0      2 Obj *
<Member> tL0809a   pt08c pt09a 0.55 0.0      4 Exc *
<Member> tL0910a   pt09a pt10a 0.55 0.0      4 Obj *

<Member> strut0103b pt01B pt03a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0204b pt02B pt04b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0305b pt03B pt05a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0406b pt04B pt06b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0507b pt05B pt07a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0608b pt06B pt08b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0709b pt07B pt09a 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0810b pt08B pt10b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *

<Member> basetb  pt01B pt01C 0.0 sqr(1.5) 10 Con *
<Member> apextb  pt10b pt10c 0.0 sqr(1.5) 10 Con *

<Member> guy0b   pt01B pt02B 0.32      0.0 3 Obj *
<Member> guy1b   pt01B pt03c 0.32/1.65 - 0.06 0.0 7 Obj *
<Member> guy2b   pt02B pt04c 0.54      0.0 3 Obj *
<Member> guy3b   pt03B pt05c 0.54*1.4622 0.0 7 Obj *
<Member> guy4b   pt04B pt06c 0.54*1.4622 0.0 7 Obj *
<Member> guy5b   pt05B pt07c 0.54      0.0 3 Obj *
<Member> guy6b   pt06B pt08c 0.54/1.4622 0.0 7 Obj *
<Member> guy7b   pt07B pt09c 0.54/1.65 0.0 7 Obj *
<Member> guy8b   pt08B pt10c 0.32      0.0 3 Obj *
<Member> guy9b   pt09b pt10c 0.32*1.65 - 0.245 0.0 7 Obj *

<Member> TL0102b   pt01B pt02C 0.55 0.0      4 Obj *
<Member> TS0203b   pt02B pt03c 1.59 + 0.03 0.0      2 Obj *
<Member> TL0203b   pt02B pt03B 0.55 0.0      4 Exc *
<Member> tS0203b   pt02B pt03b 1.59 + 0.03 0.0      2 Obj *
<Member> TS0304b   pt03B pt04b 1.59 0.0      2 Obj *
<Member> tT0303b   pt03B pt03b 0.60*1.4622 0.0 7 Obj *
<Member> TL0304b   pt03B pt04C 0.55 0.0      4 Exc *
<Member> tS0304b   pt03B pt04c 1.59 0.0      2 Obj *
<Member> tL0304b   pt03b pt04b 0.55 0.0      4 Exc *
<Member> TS0405b   pt04B pt05b 1.59 0.0      2 Obj *
<Member> tT0404b   pt04B pt04b 0.60*1.4622 0.0 7 Obj *
<Member> TL0405b   pt04B pt05B 0.55 0.0      4 Exc *
<Member> tS0405b   pt04B pt05c 1.59 0.0      2 Obj *
<Member> tL0405b   pt04b pt05c 0.55 0.0      4 Exc *
<Member> TS0506b   pt05B pt06b 1.59 0.0      2 Obj *
<Member> tT0505b   pt05B pt05b 0.60 0.0      2 Obj *
<Member> TL0506b   pt05B pt06C 0.55 0.0      4 Exc *
<Member> tS0506b   pt05B pt06c 1.59 0.0      2 Obj *
<Member> tL0506b   pt05b pt06b 0.55 0.0      4 Exc *
<Member> TS0607b   pt06B pt07b 1.59 0.0      2 Obj *
<Member> tT0606b   pt06B pt06b 0.60/1.4622 0.0 7 Obj *
<Member> TL0607b   pt06B pt07B 0.55 0.0      4 Exc *
<Member> tS0607b   pt06B pt07c 1.59 0.0      2 Obj *
<Member> tL0607b   pt06b pt07c 0.55 0.0      4 Exc *
<Member> TS0708b   pt07B pt08b 1.59 0.0      2 Obj *
<Member> tT0707b   pt07B pt07b 0.60/1.4622 0.0 7 Obj *
<Member> TL0708b   pt07B pt08C 0.55 0.0      4 Exc *
<Member> tS0708b   pt07B pt08c 1.59 0.0      2 Obj *
<Member> tL0708b   pt07b pt08b 0.55 0.0      4 Exc *
<Member> TS0809b   pt08B pt09c 1.59 0.0      2 Obj *
<Member> tT0808b   pt08B pt08b 0.60 0.0      2 Obj *
<Member> tS0809b   pt08B pt09b 1.59 0.0      2 Obj *
<Member> tL0809b   pt08a pt09b 0.55 0.0      4 Exc *
<Member> tL0910b   pt09b pt10b 0.55*1.4622 + 0.32 0.0 7 Obj *

<Member> strut0103c pt01C pt03b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0204c pt02C pt04c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0305c pt03C pt05b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0406c pt04C pt06c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0507c pt05C pt07b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0608c pt06C pt08c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0709c pt07C pt09b 0.0 sqr(2.5) 1 Con CalcClear Inelastic *
<Member> strut0810c pt08C pt10c 0.0 sqr(2.5) 1 Con CalcClear Inelastic *

<Member> basetc  pt01C pt01A 0.0 sqr(1.5) 10 Con *
<Member> apextc  pt10c pt10a 0.0 sqr(1.5) 10 Con *

<Member> guy0c   pt01C pt02C 0.32 0.0      3 Obj *
<Member> guy1c   pt01C pt03a 0.32 0.0      3 Obj *
<Member> guy2c   pt02C pt04a 0.54/1.4622 0.0 7 Obj *
<Member> guy3c   pt03C pt05a 0.54/1.4622 0.0 7 Obj *
<Member> guy4c   pt04C pt06a 0.54 0.0      3 Obj *
<Member> guy5c   pt05C pt07a 0.54*1.4622 0.0 7 Obj *
<Member> guy6c   pt06C pt08a 0.54*1.4622 0.0 7 Obj *
<Member> guy7c   pt07C pt09a 0.54 0.0      3 Obj *
<Member> guy8c   pt08C pt10a 0.32 0.0      3 Obj *
<Member> guy9c   pt09c pt10a 0.32 0.0      3 Obj *

<Member> TL0102c   pt01C pt02A 0.55 0.0      4 Obj *
<Member> TS0203c   pt02C pt03a 1.59 + 0.03 0.0      2 Obj *
<Member> TL0203c   pt02C pt03C 0.55 0.0      4 Exc *
<Member> tS0203c   pt02C pt03c 1.59 + 0.03 0.0      2 Obj *
<Member> TS0304c   pt03C pt04c 1.59 0.0      2 Obj *
<Member> tT0303c   pt03C pt03c 0.60/1.4622 0.0 7 Obj *
<Member> TL0304c   pt03C pt04A 0.55 0.0      4 Exc *
<Member> tS0304c   pt03C pt04a 1.59 0.0      2 Obj *
<Member> tL0304c   pt03c pt04c 0.55 0.0      4 Exc *
<Member> TS0405c   pt04C pt05c 1.59 0.0      2 Obj *
<Member> tT0404c   pt04C pt04c 0.60 0.0      2 Obj *
<Member> TL0405c   pt04C pt05C 0.55 0.0      4 Exc *
<Member> tS0405c   pt04C pt05a 1.59 0.0      2 Obj *
<Member> tL0405c   pt04c pt05a 0.55 0.0      4 Exc *
<Member> TS0506c   pt05C pt06c 1.59 0.0      2 Obj *
<Member> tT0505c   pt05C pt05c 0.60*1.4622 0.0 7 Obj *
<Member> TL0506c   pt05C pt06A 0.55 0.0      4 Exc *
<Member> tS0506c   pt05C pt06a 1.59 0.0      2 Obj *
<Member> tL0506c   pt05c pt06c 0.55 0.0      4 Exc *
<Member> TS0607c   pt06C pt07c 1.59 0.0      2 Obj *
<Member> tT0606c   pt06C pt06c 0.60*1.4622 0.0 7 Obj *
<Member> TL0607c   pt06C pt07C 0.55 0.0      4 Exc *
<Member> tS0607c   pt06C pt07a 1.59 0.0      2 Obj *
<Member> tL0607c   pt06c pt07a 0.55 0.0      4 Exc *
<Member> TS0708c   pt07C pt08c 1.59 0.0      2 Obj *
<Member> tT0707c   pt07C pt07c 0.60 0.0      2 Obj *
<Member> TL0708c   pt07C pt08A 0.55 0.0      4 Exc *
<Member> tS0708c   pt07C pt08a 1.59 0.0      2 Obj *
<Member> tL0708c   pt07c pt08c 0.55 0.0      4 Exc *
<Member> TS0809c   pt08C pt09a 1.59 0.0      2 Obj *
<Member> tT0808c   pt08C pt08c 0.60/1.65 0.0 7 Obj *
<Member> tS0809c   pt08C pt09c 1.59 0.0      2 Obj *
<Member> tL0809c   pt08b pt09c 0.55 0.0      4 Exc *
<Member> tL0910c   pt09c pt10c 0.55 0.0      4 Obj *


        In-Situ Member Lengths
        These are the lengths of the members when they are in place
        and prestress is applied.  These are raw unadjusted values and
        assume the hubs of the structure are single points.  The
        values are in model units.

strut0103a:          2.5 strut0204a:          2.5 strut0305a:          2.5
strut0406a:          2.5 strut0507a:          2.5 strut0608a:          2.5
strut0709a:          2.5 strut0810a:          2.5     baseta:          1.5
    apexta:          1.5      guy0a:      1.29449      guy1a:       1.8429
     guy2a:       2.0547      guy3a:      2.30991      guy4a:      2.44909
     guy5a:      2.45087      guy6a:      2.30329      guy7a:      1.96954
     guy8a:      1.65374      guy9a:      1.29282    TL0102a:      1.65685
   TS0203a:     0.815736    TL0203a:       1.8942    tS0203a:     0.779799
   TS0304a:     0.703617    tT0303a:      1.24984    TL0304a:      1.94921
   tS0304a:     0.937454    tL0304a:      1.89242    TS0405a:     0.581064
   tT0404a:      1.61934    TL0405a:      2.05214    tS0405a:     0.822683
   tL0405a:      2.17251    TS0506a:     0.825716    tT0505a:      1.63528
   TL0506a:      2.02911    tS0506a:     0.555734    tL0506a:      2.19511
   TS0607a:      1.00632    tT0606a:      1.35225    TL0607a:      1.98738
   tS0607a:     0.676035    tL0607a:      1.95204    TS0708a:     0.601817
   tT0707a:      1.06102    TL0708a:      1.91523    tS0708a:     0.790178
   tL0708a:      1.60056    TS0809a:     0.832396    tT0808a:     0.896336
   tS0809a:      0.87275    tL0809a:      2.22274    tL0910a:      1.73194
strut0103b:          2.5 strut0204b:          2.5 strut0305b:          2.5
strut0406b:          2.5 strut0507b:          2.5 strut0608b:          2.5
strut0709b:          2.5 strut0810b:          2.5     basetb:          1.5
    apextb:          1.5      guy0b:      1.58824      guy1b:      2.27898
     guy2b:      2.31517      guy3b:      2.00607      guy4b:      2.00234
     guy5b:      2.31354      guy6b:      2.42309      guy7b:      2.51111
     guy8b:      2.21836      guy9b:      1.45336    TL0102b:      1.75521
   TS0203b:     0.930325    TL0203b:      1.93809    tS0203b:     0.969385
   TS0304b:     0.682114    tT0303b:      1.04206    TL0304b:      1.87199
   tS0304b:     0.721216    tL0304b:      1.67169    TS0405b:     0.719199
   tT0404b:      1.07086    TL0405b:      1.84611    tS0405b:      0.66144
   tL0405b:       1.6706    TS0506b:     0.729723    tT0505b:      1.31591
   TL0506b:      1.95608    tS0506b:     0.982056    tL0506b:      1.96984
   TS0607b:     0.618468    tT0606b:      1.62606    TL0607b:      2.08466
   tS0607b:      0.82972    tL0607b:      2.19678    TS0708b:     0.767308
   tT0707b:      1.64813    TL0708b:      2.05111    tS0708b:     0.571532
   tL0708b:      2.17249    TS0809b:     0.909215    tT0808b:       1.2749
   tS0809b:      1.31028    tL0809b:      1.63909    tL0910b:      1.27772
strut0103c:          2.5 strut0204c:          2.5 strut0305c:          2.5
strut0406c:          2.5 strut0507c:          2.5 strut0608c:          2.5
strut0709c:          2.5 strut0810c:          2.5     basetc:          1.5
    apextc:          1.5      guy0c:      1.57956      guy1c:      2.06962
     guy2c:      2.48401      guy3c:      2.44915      guy4c:      2.32809
     guy5c:      2.01271      guy6c:      1.96583      guy7c:      2.30523
     guy8c:      2.08077      guy9c:      1.58093    TL0102c:      1.76846
   TS0203c:     0.933774    TL0203c:      2.09563    tS0203c:     0.810639
   TS0304c:     0.804028    tT0303c:      1.50537    TL0304c:       2.0392
   tS0304c:     0.562122    tL0304c:      2.07491    TS0405c:     0.988053
   tT0404c:       1.3483    TL0405c:      1.97325    tS0405c:     0.700724
   tL0405c:      1.98012    TS0506c:     0.623741    tT0505c:      1.05624
   TL0506c:      1.90696    tS0506c:      0.74613    tL0506c:      1.62697
   TS0607c:     0.712758    tT0606c:       1.0407    TL0607c:      1.83189
   tS0607c:     0.675405    tL0607c:      1.64644    TS0708c:     0.761508
   tT0707c:      1.29472    TL0708c:      1.85867    tS0708c:      1.00551
   tL0708c:      1.96604    TS0809c:     0.853541    tT0808c:      1.65197
   tS0809c:      0.92213    tL0809c:       1.9975    tL0910c:      1.81965


        Relative Member Prestress Force Magnitudes
        These values are useful for developing an assembly
        strategy for the structure.  The tighter tendons are much
        easier to tie in place early on, while the looser tendons
        can be left to the last.  This information is also used
        to adjust tendon lengths since the measured length of a tendon
        will be shorter for a highly-stressed tendon with the same
        in-situ length as a tendon which is not so stressed.

strut0103a:     -2.53472 strut0204a:     -2.14325 strut0305a:     -2.54182
strut0406a:      -1.9755 strut0507a:     -1.99333 strut0608a:     -2.54864
strut0709a:     -2.23874 strut0810a:     -2.81728     baseta:      0.49137
    apexta:       1.0465      guy0a:     0.605697      guy1a:     0.862303
     guy2a:      1.62237      guy3a:      1.24735      guy4a:     0.904466
     guy5a:     0.905121      guy6a:      1.24377      guy7a:      1.75486
     guy8a:      1.40237      guy9a:     0.413703    TL0102a:     0.911268
   TS0203a:      1.32149    tS0203a:      1.26327    TS0304a:      1.11875
   tT0303a:     0.749902    tS0304a:      1.49055    TS0405a:     0.923892
   tT0404a:     0.664481    tS0405a:      1.30807    TS0506a:      1.31289
   tT0505a:      0.67102    tS0506a:     0.883617    TS0607a:      1.60006
   tT0606a:     0.811349    tS0607a:       1.0749    TS0708a:      0.95689
   tT0707a:     0.930854    tS0708a:      1.25638    TS0809a:      1.32351
   tT0808a:     0.887373    tS0809a:      1.38767    tL0910a:     0.952565
strut0103b:     -2.07981 strut0204b:     -2.53194 strut0305b:     -2.23747
strut0406b:     -2.24067 strut0507b:      -2.5174 strut0608b:     -1.96563
strut0709b:     -1.78223 strut0810b:     -3.44806     basetb:     0.218071
    apextb:      0.48072      guy0b:     0.508235      guy1b:     0.305245
     guy2b:      1.25019      guy3b:      1.58397      guy4b:      1.58103
     guy5b:      1.24931      guy6b:     0.894861      guy7b:     0.821817
     guy8b:     0.709874      guy9b:       0.4113    TL0102b:     0.965365
   TS0203b:      1.50713    tS0203b:       1.5704    TS0304b:      1.08456
   tT0303b:     0.914221    tS0304b:      1.14673    TS0405b:      1.14353
   tT0404b:     0.939491    tS0405b:      1.05169    TS0506b:      1.16026
   tT0505b:     0.789543    tS0506b:      1.56147    TS0607b:     0.983364
   tT0606b:     0.667237    tS0607b:      1.31926    TS0708b:      1.22002
   tT0707b:     0.676295    tS0708b:     0.908736    TS0809b:      1.44565
   tT0808b:     0.764943    tS0809b:      2.08334    tL0910b:      1.43642
strut0103c:      -2.3971 strut0204c:     -1.90488 strut0305c:      -1.9937
strut0406c:     -2.53319 strut0507c:     -2.23243 strut0608c:      -2.2634
strut0709c:     -2.55189 strut0810c:     -2.37766     basetc:     0.455867
   apextc:      0.304629      guy0c:     0.505458      guy1c:     0.662278
    guy2c:      0.917362      guy3c:     0.904488      guy4c:      1.25717
    guy5c:       1.58921      guy6c:      1.55219      guy7c:      1.24482
    guy8c:      0.665848      guy9c:     0.505896    TL0102c:     0.972652
  TS0203c:       1.51271    tS0203c:      1.31323    TS0304c:      1.27841
  tT0303c:      0.617713    tS0304c:     0.893775    TS0405c:        1.571
  tT0404c:      0.808982    tS0405c:      1.11415    TS0506c:     0.991748
  tT0505c:      0.926659    tS0506c:      1.18635    TS0607c:      1.13329
  tT0606c:      0.913023    tS0607c:      1.07389    TS0708c:       1.2108
  tT0707c:      0.776829    tS0708c:      1.59876    TS0809c:      1.35713
  tT0808c:      0.600715    tS0809c:      1.46619    tL0910c:      1.00081

        Average tendon force magnitude: 1.0445


        Construction Lengths (in inches, 16ths and 32nds)
        The construction length of a tendon is less than the in-situ
        length since when the tendon is measured off it isn't under
        any prestress force.  The construction length for a member
        represents the distance between the locations where it
        departs from the hub.  The struts were cut from
        1-inch by 1-inch hardwood garden stakes.  The tendon were made
        of single strands of twisted #18 nylon twine.  Its behavior
        under stress is highly non-linear, so a look-up table
        was used to compute strains.  Prestress forces were assumed
        to affect tendon lengths and not strut lengths.

        stress-strain chart:  v04oct_d/wellingtn.ssc
        Average Tendon Force Magnitude (chart units)> 20
        Length Scale Factor> 42/2.5
        Strut and Tendon Hub Adjustments> 0 0.5
        (adjust the tendon lengths by subtracting a half inch from
         both ends)

strut0103a:  42  0 0 strut0204a:  42  0 0 strut0305a:  42  0 0
strut0406a:  42  0 0 strut0507a:  42  0 0 strut0608a:  42  0 0
strut0709a:  42  0 0 strut0810a:  42  0 0     baseta:  22 15 1
    apexta:  22  2 0      guy0a:  19  8 0      guy1a:  27 11 1
     guy2a:  29 13 1      guy3a:  34  4 0      guy4a:  37  0 1
     guy5a:  37  1 0      guy6a:  34  2 1      guy7a:  28  6 0
     guy8a:  24  1 1      guy9a:  19 13 0    TL0102a:  24 12 0
   TS0203a:  11  7 1    tS0203a:  10 15 1    TS0304a:   9 14 0
   tT0303a:  18 10 0    tS0304a:  13  3 1    TS0405a:   8  1 0
   tT0404a:  24  8 0    tS0405a:  11  9 1    TS0506a:  11 10 0
   tT0505a:  24 12 0    tS0506a:   7 11 0    TS0607a:  14  2 1
   tT0606a:  20  2 1    tS0607a:   9  7 1    TS0708a:   8  6 0
   tT0707a:  15  8 0    tS0708a:  11  2 0    TS0809a:  11 11 1
   tT0808a:  12 15 1    tS0809a:  12  4 1    tL0910a:  25 13 1
strut0103b:  42  0 0 strut0204b:  42  0 0 strut0305b:  42  0 0
strut0406b:  42  0 0 strut0507b:  42  0 0 strut0608b:  42  0 0
strut0709b:  42  0 0 strut0810b:  42  0 0     basetb:  23  8 0
    apextb:  23  0 0      guy0b:  24  5 1      guy1b:  35 15 1
     guy2b:  34  5 0      guy3b:  29  2 1      guy4b:  29  1 1
     guy5b:  34  5 0      guy6b:  36 10 1      guy7b:  38  3 0
     guy8b:  33 13 1      guy9b:  22  6 0    TL0102b:  26  3 0
   TS0203b:  13  1 1    tS0203b:  13 10 0    TS0304b:   9  8 1
   tT0303b:  15  3 1    tS0304b:  10  2 0    TS0405b:  10  1 1
   tT0404b:  15 10 1    tS0405b:   9  4 0    TS0506b:  10  4 0
   tT0505b:  19  9 1    tS0506b:  13 13 1    TS0607b:   8 10 0
   tT0606b:  24 10 0    tS0607b:  11 11 0    TS0708b:  10 12 1
   tT0707b:  24 15 0    tS0708b:   7 15 0    TS0809b:  12 13 0
   tT0808b:  19  0 0    tS0809b:  18  6 0    tL0910b:  18  6 0
strut0103c:  42  0 0 strut0204c:  42  0 0 strut0305c:  42  0 0
strut0406c:  42  0 0 strut0507c:  42  0 0 strut0608c:  42  0 0
strut0709c:  42  0 0 strut0810c:  42  0 0     basetc:  23  0 1
    apextc:  23  5 1      guy0c:  24  3 1      guy1c:  31  9 1
     guy2c:  37  9 0      guy3c:  37  0 1      guy4c:  34  8 0
     guy5c:  29  4 0      guy6c:  28  9 1      guy7c:  34  3 0
     guy8c:  31 12 0      guy9c:  24  3 1    TL0102c:  26  6 0
   TS0203c:  13  2 0    tS0203c:  11  6 1    TS0304c:  11  5 0
   tT0303c:  22 13 0    tS0304c:   7 12 1    TS0405c:  13 14 1
   tT0404c:  20  1 1    tS0405c:   9 13 0    TS0506c:   8 11 0
   tT0505c:  15  7 0    tS0506c:  10  7 1    TS0607c:  10  0 0
   tT0606c:  15  3 0    tS0607c:   9  7 0    TS0708c:  10 11 0
   tT0707c:  19  4 1    tS0708c:  14  2 1    TS0809c:  12  0 1
   tT0808c:  25  2 1    tS0809c:  13  0 0    tL0910c:  27  2 0


        Material Quantities
        This provides an estimate of how much material will
        be needed to assemble the structure, in this case
        inches of garden stake and inches of nylon twine.
        The lengths must be adjusted to take into account the
        fact that the strut extends past the hub and some length
        of tendon is required to tie it to the strut.

        Length Scale Factor> 42/2.5 
        Strut and Tendon Adjustments> (-1) (-6)
        (adjust the strut lengths by adding an inch to
         both ends; adjust the tendon lengths by adding
         six inches to both ends)

                    Cross
         Type     Section    Quantity Count
 
            1           1        1056    24
           10           1     212.129     6
            7           1     1141.62    30
            3           1     552.022    13
            4           1     190.056     5
            2           1     1151.18    48
        Strts                    1056    24
        Tndns                 3247.02   102
 

        Alternative Construction Lengths
        Several of the original tendons on the arch snapped after
        rubbing against a tree limb it was under.  They were replaced
        by double strands of braided nylon twine.  The braided
        twine's behavior under stress is different from the
        behavior of twisted twine, so a different look-up table
        was used to compute strains.

        stress-strain chart:  v02oct_s/evans.ssc
        Average Tendon Force Magnitude (chart units)> 20
        Length Scale Factor> 42/2.5
        Strut and Tendon Hub Adjustments - s;t> 0 0.5

strut0103a:  42  0 0 strut0204a:  42  0 0 strut0305a:  42  0 0
strut0406a:  42  0 0 strut0507a:  42  0 0 strut0608a:  42  0 0
strut0709a:  42  0 0 strut0810a:  42  0 0     baseta:  23  5 1
    apexta:  22  9 0      guy0a:  19 13 1      guy1a:  28  3 1
     guy2a:  30  6 1      guy3a:  34 14 1      guy4a:  37 11 1
     guy5a:  37 12 0      guy6a:  34 13 0      guy7a:  28 15 0
     guy8a:  24  8 1      guy9a:  20  1 1    TL0102a:  25  3 0
   TS0203a:  11 11 0    tS0203a:  11  2 1    TS0304a:  10  1 0
   tT0303a:  18 15 1    tS0304a:  13  7 1    TS0405a:   8  3 1
   tT0404a:  25  0 0    tS0405a:  11 13 0    TS0506a:  11 13 1
   tT0505a:  25  3 1    tS0506a:   7 13 1    TS0607a:  14  7 0
   tT0606a:  20  8 1    tS0607a:   9 10 1    TS0708a:   8  8 1
   tT0707a:  15 12 1    tS0708a:  11  5 0    TS0809a:  11 15 0
   tT0808a:  13  3 1    tS0809a:  12  8 1    tL0910a:  26  5 1
strut0103b:  42  0 0 strut0204b:  42  0 0 strut0305b:  42  0 0
strut0406b:  42  0 0 strut0507b:  42  0 0 strut0608b:  42  0 0
strut0709b:  42  0 0 strut0810b:  42  0 0     basetb:  23 13 0
    apextb:  23  5 1      guy0b:  24 12 0      guy1b:  36  7 0
     guy2b:  34 15 1      guy3b:  29 11 1      guy4b:  29 10 1
     guy5b:  34 15 0      guy6b:  37  5 0      guy7b:  38 14 0
     guy8b:  34  7 1      guy9b:  22 11 0    TL0102b:  26 11 0
   TS0203b:  13  5 1    tS0203b:  13 14 1    TS0304b:   9 12 0
   tT0303b:  15  8 0    tS0304b:  10  5 0    TS0405b:  10  4 1
   tT0404b:  15 15 0    tS0405b:   9  7 0    TS0506b:  10  7 0
   tT0505b:  19 15 1    tS0506b:  14  1 1    TS0607b:   8 12 1
   tT0606b:  25  1 1    tS0607b:  11 14 1    TS0708b:  11  0 0
   tT0707b:  25  7 0    tS0708b:   8  1 1    TS0809b:  13  1 0
   tT0808b:  19  5 1    tS0809b:  18 12 1    tL0910b:  18 11 1
strut0103c:  42  0 0 strut0204c:  42  0 0 strut0305c:  42  0 0
strut0406c:  42  0 0 strut0507c:  42  0 0 strut0608c:  42  0 0
strut0709c:  42  0 0 strut0810c:  42  0 0     basetc:  23  6 0
    apextc:  23 10 1      guy0c:  24  9 1      guy1c:  32  3 1
     guy2c:  38  4 0      guy3c:  37 11 1      guy4c:  35  2 1
     guy5c:  29 13 0      guy6c:  29  2 1      guy7c:  34 13 0
     guy8c:  32  6 0      guy9c:  24 10 0    TL0102c:  26 14 0
   TS0203c:  13  6 0    tS0203c:  11  9 1    TS0304c:  11  8 1
   tT0303c:  23  3 1    tS0304c:   7 15 0    TS0405c:  14  3 0
   tT0404c:  20  7 1    tS0405c:  10  0 0    TS0506c:   8 14 0
   tT0505c:  15 11 1    tS0506c:  10 11 0    TS0607c:  10  3 0
   tT0606c:  15  7 1    tS0607c:   9 10 0    TS0708c:  10 14 1
   tT0707c:  19 10 1    tS0708c:  14  7 0    TS0809c:  12  4 0
   tT0808c:  25 10 0    tS0809c:  13  4 0    tL0910c:  27 10 1


        Alternative Material Quantities
        This provides an estimate of how much material will
        be needed to assemble the structure when double strands
        of braided nylon twine are used for all the tendons.
        The Quantity value given for each Type does not take
        into account the Cross Section value.  The total
        Quantity given across from Tndns does.

        Length Scale Factor> 42/2.5 
        Strut and Tendon Adjustments> (-1) (-6)

                    Cross
         Type     Section    Quantity Count
 
            1           1        1056    24
           10           2     215.348     6
            7           2     1162.58    30
            3           2     562.021    13
            4           2     193.623     5
            2           2     1173.01    48
        Strts                    1056    24
        Tndns                 6613.16   102

oblique view of tensegrity arch
View of the Tensegrity Arch

Schematic for the Tensegrity Arch
Schematic for the Tensegrity Arch

structure:   arch/x3l8arch2.rc
variable:    arch/x3l8arch2.dat
digit list:  src/standard.dls

CONTACT:

Bob Burkhardt
Tensegrity Solutions
Box 426164
Cambridge, MA 02142-0021
USA

e-mail: bobwb@juno.com

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