Rigging Point to Pitch Head Tape Offset Calculator
Actual same-line tape-coordinate rigpoint minus pitchhead, signed placement offset only; not a usable rope length or approved anchor location.
Description
Pitch-head offset compares two positions measured from the same tape reference.
Pitch-head offset compares two positions measured from the same tape reference.1
Its sign preserves which point is farther along the declared reference line.
When to use Rigging Point to Pitch Head Tape Offset Calculator
Use this tool to obtain signedRigPointOffsetFromPitchHeadMeters from the supplied records using the stated calculation. Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
How to use Rigging Point to Pitch Head Tape Offset Calculator and understand its results
- Establish the survey or observation scope, reference frame, units and independently applicable calibration or qualified plan.
- Enter actualTapeReferenceToPitchHeadMeters, actualTapeReferenceToRigPointMeters, using the field meanings and rules below, then run the tool.
- Read result.signedRigPointOffsetFromPitchHeadMeters. Use the units and sign conventions below, and review any unknown records separately.
- Correct any reported input issue and run again. Before using a successful result, check the stated units, signs, reference scope and observation coverage.
| Input field | Meaning | Value type | Requirement |
|---|---|---|---|
| actualTapeReferenceToPitchHeadMeters | Actual tape reference to pitch head meters | number | Required |
| actualTapeReferenceToRigPointMeters | Actual tape reference to rig point meters | number | Required |
Require nonnegative distances from one tape reference to pitch head and rig point. Subtract pitch-head distance from rig-point distance and preserve the sign in metres.
rigOffsetMeters=rigPointDistance−pitchHeadDistance Use the matching field units and the exact boundary, ordering and reference rules above.
| Output field | Meaning | Value type |
|---|---|---|
| result | Qualified observed calculation or explicit reference | object |
| result.signedRigPointOffsetFromPitchHeadMeters | Signed Rig Point Offset From Pitch Head Meters; preserve the subtraction order and sign defined in the mechanics | number |
{
"input": {
"actualTapeReferenceToPitchHeadMeters": 3,
"actualTapeReferenceToRigPointMeters": 5
},
"output": {
"result": {
"signedRigPointOffsetFromPitchHeadMeters": 2
}
}
}Limitations and assumptions
The actual observation coverage, calibration and qualified plan determine applicability. A numerical result does not establish survey accuracy, route suitability, atmosphere conditions or equipment adequacy beyond the declared comparison.
Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Extremely large composite outputs are rejected.
Alternative or Complementary methods
For a related step, use Vertical Rope Required Length Calculator: A vertical rope-length inventory combines an independently designed path with separate allowances. For a complementary comparison, use Pitch Headroom Clearance Checker: Pitch headroom is a measured clearance requiring user, equipment and passage context.
References
Similar or alternative tools
- Vertical Rope Required Length Calculator
A vertical rope-length inventory combines an independently designed path with separate allowances.
- Pitch Headroom Clearance Checker
Pitch headroom is a measured clearance requiring user, equipment and passage context.