Crane Load Chart Calculator

Audit actual observed crane load against independently verified exact radius/boom/configuration load-chart bands; no interpolated capacity or lift authorization. Unknown criterion indices distinguish zero placeholders from known zero margins. Caller independently establishes units, regime, calibration and applicability; this does not establish design-code compliance, authenticity, operational safety, treatment efficacy or a validated forecast.

Description

A crane chart comparison needs the correct independently supplied limits and measurements.

A crane chart comparison needs the correct independently supplied limits and measurements.^[1]

Known and unassessed criteria must remain distinct from an installed equipment load chart. Use Crane Load Chart Calculator to compare observations with caller-supplied bands.

When to use Crane Load Chart Calculator

Use Crane Load Chart Calculator to compare observations with caller-supplied bands. Choose appropriate units and independently verified criterion bands; mark every unassessed criterion with known flag 0.

How to use Crane Load Chart Calculator and understand its results

Choose appropriate units and independently verified criterion bands; mark every unassessed criterion with known flag 0.
Enter Observed crane load, Caller verified crane load lower, Caller verified crane load upper, Known crane load criterion flags using the field table and validation rules below, then run the tool.
Read Signed known band margins, Known review indices, Unknown criterion indices and interpret units, signs, ordering and placeholders as explained below.
If the tool reports an input error, correct that field and rerun. A successful false result, empty match list or unknown-evidence placeholder has the specific meaning described here; check the limitations before applying the result.

Input field	Meaning	Value type	Requirement
observedCraneLoad	Observed crane load	array of number	Required; constraints below
callerVerifiedCraneLoadLower	Caller verified crane load lower	array of number	Required; constraints below
callerVerifiedCraneLoadUpper	Caller verified crane load upper	array of number	Required; constraints below
knownCraneLoadCriterionFlags	Known crane load criterion flags	array of number	Required; constraints below

Provide aligned nonempty arrays of observations, lower limits, upper limits and known flags. All numbers must be finite, each lower limit must not exceed its upper limit, and flags must be 0 or 1. Known criteria receive min(observation−lower, upper−observation); a negative margin requests review, while equality is inside the band. Unknown criteria receive a zero placeholder and are listed separately. Review and unknown indices are zero based and retain input order. Limits and their applicable units come from the caller, rather than an installed assessment scale.

known margin = min(observation−lower, upper−observation); unknown margin = 0 placeholder

Field order, units and branch conditions follow the implementation explanation above.

Output field	Meaning	Value type
signedKnownBandMargins	Signed distance to the closer limit; negative means outside; 0 for unknown criteria is a placeholder.	array of number
knownReviewIndices	Zero-based indices of known observations strictly outside their inclusive bands.	array of number
unknownCriterionIndices	Zero-based indices of criteria marked unknown; their zero margins are placeholders.	array of number

json

{
  "input": {
    "observedCraneLoad": [
      2,
      5
    ],
    "callerVerifiedCraneLoadLower": [
      1,
      1
    ],
    "callerVerifiedCraneLoadUpper": [
      3,
      4
    ],
    "knownCraneLoadCriterionFlags": [
      1,
      0
    ]
  },
  "output": {
    "signedKnownBandMargins": [
      1,
      0
    ],
    "knownReviewIndices": [],
    "unknownCriterionIndices": [
      1
    ]
  }
}

Limitations and assumptions

Known and unassessed criteria must remain distinct from an installed equipment load chart. Apply the exact scope and assumptions described above.

All listed fields require explicit values. Unexpected fields, incorrect types, nonfinite numbers and sparse arrays fail validation. Domain-specific bounds, alignments and supported tokens are stated above; extremely large inputs or outputs can also be rejected. These errors differ from successful results such as false, no matches or unknown evidence.

Alternative or Complementary methods

Use Crane Stability Moment Calculator for a related task: Crane stability compares stabilizing and overturning moments about an adopted reference.

Use Braced Excavation Strut Load Calculator for a related task: A tributary-area model converts supplied lateral pressure into a strut demand.

References

Crane Load Chart Calculator — tool.io

Similar or alternative tools

Crane Stability Moment Calculator
Crane stability compares stabilizing and overturning moments about an adopted reference.
Braced Excavation Strut Load Calculator
A tributary-area model converts supplied lateral pressure into a strut demand.