Grow plant support string inventory calculator

Calculate string lengths per support and total string with your own figures.

Your numbers

Use the units shown. Results update as you change valid inputs.

Use string lengths per support and total string to compare changes to your inputs. The method and limits below explain the scope.

Examples

Examples

Try the starting example

Plant supports [horizontal run m,vertical rise m]
[[0,2],[0.3,2],[0.4,1.8]]
Attachment allowance per end (m)
0.2
String spool length (m)
100
String lengths per support (m)
[2.4,2.42237484162,2.24390889146]
Total string (m)
7.066284
Spools in a feasible cut plan
1

Try another scenario

Plant supports [horizontal run m,vertical rise m]
[[0,2],[0.3,2],[0.4,1.8]]
Attachment allowance per end (m)
0.3
String spool length (m)
100
String lengths per support (m)
[2.6,2.62237484162,2.44390889146]
Total string (m)
7.666284
Spools in a feasible cut plan
1
Calculation method

Calculation method

String lengths per support (m)

Straight-line hypot(horizontal,vertical)+2 attachment allowance.

Total string (m)

Sum supplied supports.

Spools in a feasible cut plan

First-fit decreasing bin packing of continuous support lengths into spool lengths; no segment may exceed a spool. Feasible count, not guaranteed minimum.

Symbols and units
a
Plant supports [horizontal run m,vertical rise m]
b
Attachment allowance per end (m)
c
String spool length (m)

Use the units shown. A list keeps the order in which you enter its values. The symbol ^ means “raised to the power of”.

Assumptions & limits

Assumptions & limits

  • Plant positions-heights, attachment allowance. Returns String lengths and spool quantity. All coefficients and observations are user supplied; results describe only the stated mathematical model. Quantities are deterministic calculations from supplied observations and assumptions; no external data is fetched. Supported limits: Finite inputs only; numeric fields bounded as labelled. Lists and JSON records are limited to 256 entries unless a stricter tool bound is stated. No automatic design approval, legal conclusion, treatment recommendation or safety certification. Attachment allowance per end (m): minimum 0, maximum 1000000000000.0. String spool length (m): minimum 1e-12, maximum 1000000000000.0.
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