Room Width Calculator

Audit actual paired room-wall same-datum survey widths against independent marks, not geometry-derived support or prescribed room span. Caller independently verifies units, applicability and matching conditions; no operational recipe, safety certification, causal efficacy or legal/resource classification is inferred.

Description

Paired wall offsets measured from one datum give a room’s clear width.

Paired wall offsets measured from one datum give a room’s clear width.^[1]

A plan comparison retains over-width and under-width observations.

When to use Room Width Calculator

Use this tool to calculate or review the supplied observations under the stated rules. Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.

How to use Room Width Calculator and understand its results

Match completed survey or ledger observations by block, segment or stage and confirm their units and boundaries.
Enter observedRoomLeftWallOffsetsM, observedRoomRightWallOffsetsM, observedIndependentPlannedWidthsM, using the field meanings and rules below, then run the tool.
Read observedRoomClearWidthsM, signedRoomWidthDeviationsM. Inspect nested result fields where present, and review unknown records separately from known matches.
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
observedRoomLeftWallOffsetsM	Observed room left wall offsets m	list of number	Required
observedRoomRightWallOffsetsM	Observed room right wall offsets m	list of number	Required
observedIndependentPlannedWidthsM	Observed independent planned widths m	list of number	Required

Use aligned finite wall offsets and nonnegative independent planned widths. Require right−left≥0, then return that width and width−plannedWidth.

width_i=right_i−left_i; deviation_i=width_i−planned_i

Use the matching field units and the exact boundary, ordering and reference rules above.

Output field	Meaning	Value type
observedRoomClearWidthsM	Observed room clear widths m	list of number
signedRoomWidthDeviationsM	Signed room width deviations m; preserve the subtraction order and sign defined in the mechanics	list of number

json

{
  "input": {
    "observedRoomLeftWallOffsetsM": [
      1,
      2
    ],
    "observedRoomRightWallOffsetsM": [
      4,
      6
    ],
    "observedIndependentPlannedWidthsM": [
      3,
      3
    ]
  },
  "output": {
    "observedRoomClearWidthsM": [
      3,
      4
    ],
    "signedRoomWidthDeviationsM": [
      0,
      1
    ]
  }
}

Limitations and assumptions

Units, ledger boundaries, survey interpretation and model applicability must be independently established. These summaries do not assign reserve/resource classifications or establish support adequacy, ventilation safety or an operating setting.

Missing required fields, unknown fields, wrong types and violated rules return input issues. Numeric values and outputs must be finite. Lists and matrices must be dense, without missing cells. Numeric lists allow at most 10000 entries; ordinary string lists allow at most 128 strings of 128 UTF-16 units each; numeric matrices allow at most 128 rows and 128 columns, subject to narrower requirements above.

Alternative or Complementary methods

For a related step, use Room and Pillar Width Calculator: A repeating-cell pitch minus room width gives an equivalent residual pillar width. For a complementary comparison, use Mining Width Calculator: An extraction width survey can be compared with independently marked target dimensions.

References

Room Width Calculator — tool.io

Similar or alternative tools

Room and Pillar Width Calculator
A repeating-cell pitch minus room width gives an equivalent residual pillar width.
Mining Width Calculator
An extraction width survey can be compared with independently marked target dimensions.