How do you translate ISO 13857:2019 machinery safety-distance drawings, guard-opening dimensions and reach-path assessments without accidentally stating that a dangerous machine is safe? Start by separating a measured dimension from a required safety distance, identifying the exact route a limb could take toward a hazard, and preserving every qualification that belongs to the risk assessment. A translated millimetre value is not by itself a compliance decision.
This educational guide explains technical translation of ISO 13857:2019, industrial machine-guard terminology, upper- and lower-limb reach distances, protective-structure drawings, apertures, access zones, installation notes, inspection findings and multilingual machinery safety records. It is written for translators, engineering document controllers, manufacturers, inspection teams and international buyers who need accurate cross-language interpretation of a specific machinery-safety document rather than a general introduction to translation.
Quick answer: identify the hazard, the protective structure, the relevant person and the exact direction of possible access; carry each measurement with its units, datum, drawing revision and uncertainty; and preserve whether the source reports a design requirement, a measurement, an observation, a proposal or an approved finding. Do not invent table values from memory, and never translate a proposed correction as an implemented risk control. A qualified machinery-safety professional must decide whether the actual application meets applicable requirements.
- Preserve the geometry, units, inequalities and drawing revision.
- Separate requirements, measurements, risk observations and approvals.
- Check the actual authorised standard tables rather than inventing numeric thresholds.
- Escalate source inconsistencies before releasing the translation.
The essential distinction: safety distance is not simply clearance
A machine can contain several spaces that look similar on a drawing but serve different purposes. There may be a maintenance clearance behind a panel, a passage for material, a gap measured between two mechanical parts, and a safety distance intended to prevent a person reaching a hazard. Translation must name the intended function of the measurement. If a note says “service clearance 180 mm”, it cannot silently become “minimum safety distance 180 mm”. Conversely a specified safety distance should not be softened into a convenient installation gap. The source expression must be read with its drawing arrows, neighbouring text and actual design purpose.
ISO 13857:2019 concerns distances intended to prevent upper or lower limbs reaching hazard zones, with defined applicability and assumptions. It is not a promise that mere physical separation removes every risk from a machine. Heat, noise, dust, emissions, radiation, and entanglement can require additional controls. If the translator sees the word “guard” but the drawing depicts an open process area rather than a protective structure, that conflict needs clarification. Label it as an unresolved source discrepancy; do not invent a missing guard.
A sound translation therefore has two layers. The first transmits what the drawing and accompanying record say. The second records what cannot responsibly be concluded from them. That second layer is especially important in sales proposals, tender documents and factory acceptance reports, where a convenient phrase such as “safe distance achieved” may be interpreted as a formal acceptance statement.
What the standard covers and what it does not
The ISO catalogue describes the 2019 edition as a standard for safety distances preventing people from reaching machine hazard zones with their upper and lower limbs. It provides guidance for industrial and non-industrial contexts and includes conditions about protective structures. It addresses people aged 14 years and over and adds particular information for upper-limb reach through openings by children older than three. These population assumptions are not interchangeable with all-age protection, and a translation must not promise universal coverage.
It also matters that lower-limb access is handled under specified conditions. When upper-limb access to the same hazard remains foreseeable, a simple note about foot access cannot substitute for a full risk assessment. The translator should preserve references to a “foreseeable” route, a “reasonably accessible” zone or a “risk-assessment assumption” instead of compressing them into a confident safety verdict.
This article is educational, not an authorised reproduction of proprietary standard tables. The engineer should consult the correctly licensed edition, product-specific hazard assessment and applicable local regulations. If a figure or table is absent from the supplied source package, do not reconstruct it from a search snippet. Instead ask for the exact table, clause and edition used by the responsible designer.
Read the drawing as a geometric argument
The important questions are physical: where is the hazard, where is the person expected to stand, what blocks access, and which route could a hand or foot follow? A dimension line can indicate vertical height, horizontal separation, opening width or a path along a protective structure. Translating all four as “distance to the machine” discards the geometry that gives the number meaning.
A drawing may contain a plan view, a section view and a detail enlarged to show an aperture. Each view has a different scale and may use separate reference points. A note saying “measure from outer guard face” needs that datum retained. A translator who instead writes “from machine edge” can shift the measurement origin. The number stays the same on paper, but the instruction changes in the factory.
Create a drawing register before translating. Record sheet number, revision, view label, unit, symbol, dimension ID, attached note and the named hazardous movement. Where two arrows use the same letter, determine whether the drawing repeats a symbol intentionally or uses it for different measurements. Text without this geometrical context is not enough to certify what the drawing requires.
Guard openings need shape, orientation and access context
An aperture may be round, square, slot-shaped, irregular or defined by the gap under a guard. Its orientation can affect what body part can pass through it and how the hazard can be approached. Do not translate “slot width” as the diameter of a circular hole. Do not convert a maximum allowable opening into a minimum design opening. If the source describes mesh, preserve wire spacing and construction details separately from the effective opening.
The word “opening” itself is dangerously broad. A hatch that opens during maintenance differs from a permanent slot for product flow. A panel gap under normal operation differs from a temporary gap created after a guard is removed. When the source says “opening with guard closed”, that condition must survive the translation. Otherwise the target language may suggest that the measured geometry applies during cleaning or set-up, which has not been shown.
Guard dimensions are sometimes measured after installation, while design drawings show nominal values. A report should identify whether the value is calculated, specified, measured or tolerated. A nominal drawing opening that says 12 mm plus a manufacturing tolerance is not automatically a measured 12 mm opening. Translators preserve those distinctions; engineers decide whether the installation is acceptable.
Reaching over, through, under and around are separate routes
A hazard can be reached over a fence even when the fence is tall. It may also be reached through mesh, beneath a conveyor guard, around an end panel or through a feed opening. These routes should never be merged under a vague expression such as “guard spacing”. The original relationship between opening, barrier and hazard position is what the safety-distance assessment examines.
For reach-over wording, identify the protective structure height and the relevant horizontal separation rather than conflating them. For reach-through wording, the opening geometry matters. For underneath access, clearance from the floor or supporting surface can be relevant. For access around an end, the position and continuity of the structure matter. An installer may need all four scenarios assessed, not merely the easiest one to illustrate.
In multilingual documentation, common spatial words can be tricky: “behind”, “inside”, “over”, “across” and “past” have different grammatical conventions. Test the target-language wording against a marked-up diagram. Ask a reader unfamiliar with the original to point to the hazard and trace the described route. If they point in the wrong direction, the sentence needs revision even when its vocabulary appears technically sophisticated.
Never reconstruct a safety-distance number from memory
Technical translators are frequently asked for a number rather than a translation: “What is the distance for this opening?” That answer depends on conditions and the relevant source table. If you have only a scan showing one part of the drawing, you may lack the height, aperture geometry, hazard location or actual table reference needed to interpret the number. Do not insert a plausible figure to make an incomplete document look complete.
Units matter. Millimetres and inches must be handled deliberately, not visually. If the source says “≥”, retain the direction of the inequality; if it says “≤”, do not exchange it for a general “up to” without checking what quantity is bounded. Preserve inclusive and exclusive thresholds exactly. An inequality may tell the builder which direction is safer. Reversing the sign can reverse the intended control.
When converting units for an international audience, keep the original controlled value and provide any conversion as explicitly secondary and rounded under an approved policy. Tolerances must travel with the original value. For a regulated or acceptance-critical drawing, a reader should be able to reconstruct the source measurement from the translation without guessing which figure was rounded.
Who is the assumed user of the machine?
The same equipment may be used in a restricted factory, a public-facing demonstration or an educational workshop. An access assessment can consider foreseeable users, bystanders and maintenance staff. This does not mean a translator independently selects a safety distance for a different population. It means the translation must preserve the documented design assumptions. If a source specifies adult operators and another document discusses children, record the difference as a potential design question.
ISO 13857:2019 itself sets scope assumptions, including age information; those words should not be erased from training material. The statement “for persons aged 14 years and over” is not equivalent to “for all users”. A child-related condition for reaching through an opening is not blanket certification for child operation of machinery.
Also distinguish routine operations from foreseeable intervention. A protective device that works when a line runs normally may be absent during a maintenance procedure, which calls for other control measures. Translate “during normal automatic cycle” or “with isolator locked off” as conditions attached to the claim. When those words disappear, the target text may appear to approve use in a state that the source never assessed.
The hierarchy of evidence: design, inspection and acceptance
A design note says what should be built. An installation survey says what was observed. A corrective-action ticket says what someone plans to change. A final acceptance record says what an authorised reviewer has accepted under stated conditions. These are different documents, and they should use different verbs. The translation should preserve “shall”, “should”, “proposed”, “measured”, “noted”, “verified” and “approved” according to the source and its legal context.
Suppose a drawing states that a guard must be modified and a later spreadsheet says “closed”. The spreadsheet may merely show an administrative status. A translated report must not jump from the two documents to the unqualified claim “the machine conforms”. The appropriate reader needs the relevant as-built evidence, inspection date, inspection criteria and sign-off.
A controlled bilingual package can include a claim ladder: design requirement, site observation, discrepancy, proposed remedy, completed correction, verification and acceptance. Every sentence should belong on one rung. This structure prevents an innocent language improvement from becoming an unauthorised engineering conclusion.
Translate hazardous motion and injury mechanisms accurately
The hazard is not always a visible rotating blade. Reaching into the wrong area can expose a person to pinch points, crushing movements, shearing edges, drives, actuators or unexpected starts. A guard drawing may name moving parts in manufacturer-specific shorthand. The translator needs to identify whether a word refers to a part, a mode of operation or an injury mechanism. “Shear edge” is not a reference to scissors used by the operator; “nip point” is a trapping interface rather than a maintenance aperture.
Translate actions precisely. “Prevent access” is stronger than “discourage access”. “Restrict reach” is different from “remove hazard”. “Interlocked guard” is not the same as “fixed barrier”. If a report states that movement stops when a guard is opened, the target language should not say that opening the guard makes the device safe in all circumstances. The safety function needs its own verification.
Where a manufacturer has a fixed name for a component, retain its identifier and supply a short approved definition. This allows the translated document to match labels, wiring diagrams and spare-part lists during inspection.
Protect the distinction between a warning and a control
A warning sign, training instruction or procedure can communicate risk, but it is not interchangeable with a physical guard. When a document says “fit a guard and display a warning”, the translation should preserve both obligations rather than making them alternatives. Likewise, a warning that says “do not reach through” does not establish that the opening itself meets a protective-distance criterion.
A proposed operating rule may reduce foreseeable exposure, but the responsible risk assessor must evaluate it in context. The translator should not improve the source by writing “risk eliminated” or “no danger” simply because the intervention sounds sensible. The conclusion belongs to the evidence and responsible signatory.
During review, highlight any language that could read as a new promise. Words such as “guaranteed”, “fully safe”, “certified” and “compliant” can be stronger than neutral observations. If they are present in the source, carry them carefully and ask whether they were authorised; if not present, never add them. Good translation protects the boundary between communication and engineering judgement.
Local regulations and equipment-specific instructions still govern
ISO standards give a technical framework, but actual legal obligations vary by jurisdiction, machine type and duty holder. A translated technical note is not a substitute for the applicable law, manufacturer instructions, local risk assessment or required conformity procedure. A buyer reading an English-to-Spanish or German-to-English document may assume that one standard label grants international approval. It does not.
Put edition, issuing body and document purpose in the header. If the buyer requests another national adoption of the standard, compare the exact adopted document with the original rather than assuming every version has identical status. Where the document quotes a regulation, reproduce the citation and jurisdiction. A European compliance file, for example, should not be recast as an unqualified claim that a product is accepted everywhere.
A translator may help identify the unresolved difference, but not solve it by inventing a regulation. Note who must verify the law, who must check the machine and which document will record the result. That separation increases trust instead of making the translation appear weak.
Prepare a bilingual engineering terminology sheet
Make a termbase that is small enough to use and precise enough to stop harmful ambiguity. Useful entries include hazard zone, guard, protective structure, reach-over distance, reach-through opening, lower-limb access, aperture, slot, mesh, clearance, safe distance, residual risk, risk assessment, design requirement, measured dimension, inspection finding and corrective action. For each entry, record what it is, what it is not, an approved target term, the source document and one representative sentence.
The definition matters more than a dictionary synonym. “Guard height” should identify the physical reference points. “Gap” should state whether it is a vertical opening, panel-to-frame clearance or operating dimension. Terms may have different preferred wording in manufacturing, regulatory and training materials. One approved term does not always fit every context, so the termbase should name the domain.
Finally, check the translated figure captions, table headings, abbreviations and legends. A glossary that appears perfect while the drawing calls the same part three different names creates risk. The reader should be able to trace one component across all documents without becoming a detective.
A reproducible multilingual review workflow
First obtain the controlled source package, not an anonymous screenshot. Confirm edition, document status, drawing revision and client jurisdiction. Second build a list of dimensions with their units and symbols. Third identify the physical path of possible access in every drawing view. Fourth translate labels and narrative explanations while preserving the difference between requirement, observation and decision. Fifth match every translated numeric expression to its exact source occurrence.
Sixth have a technically competent reviewer check geometry, not just language fluency. Seventh perform a reverse-location test: can the reviewer find every translated guard, hazard and opening on the same drawing? Eighth inspect formatting for inequality signs, superscripts, decimal separators and line breaks. Ninth compare technical changes across revisions so a stale translation does not remain in circulation. Finally release a traceable bilingual package with a clear approving authority.
Do not interpret a “passed translation QA” result as machine acceptance. Language QA answers whether the target document faithfully communicates the source; engineering verification answers whether the installed equipment and its documented controls meet the relevant requirements. Maintaining separate sign-offs avoids a confusion that can be serious on the shop floor.
Five failures that deserve immediate escalation
Escalate when a source table reference is missing, when two drawings give different dimensions for the same opening, when a target-language instruction reverses a direction of access, when measured and specified values are confused, or when a sentence upgrades a proposal into a compliance declaration. These errors can be caught without the translator independently determining the correct safety distance.
Consider a bilingual drawing with a note “see Table X” but no table included. The correction is not to consult an internet picture and fill in a number. It is to obtain the controlled table from the authorised project. Or consider a client requesting that “guard repositioning pending” become “guard repositioned”. That is not a translation preference; it changes the documented state of the equipment.
A helpful translator communicates exactly what information is missing, why the uncertainty matters, and which signatory can resolve it. The aim is not to embarrass a project team but to stop incomplete evidence passing silently into a finished-looking document.
Eighteen worked machinery safety-translation cases
These are invented teaching cases, not actual engineering approvals or measurements establishing conformance. Each demonstrates how a translator can keep source evidence and target-language claims aligned.
Case 1: A slot in a fixed guard
Source situation: A French drawing identifies a 14 mm vertical slot in a sheet-metal guard and a dimension to a drive chain, but its extracted text omits the view label.
Translation decision: The translation preserves slot shape, orientation, 14 mm measured or nominal status if supplied, and the referenced view number. It does not supply a table threshold or conclude compliance.
Review and control: Request the full drawing, the applicable table and the design or inspection context. A slot size alone cannot establish the hazard reach path.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 2: Two conflicting guard heights
Source situation: A German installation sketch names a nominal barrier height while a later survey records a smaller as-built height measured from a raised platform.
Translation decision: Write both heights with their dates and datums. The discrepancy is factual, not something to average or silently resolve in translation.
Review and control: Escalate the difference to the responsible engineer, including the possible platform effect. An earlier nominal height is not evidence of actual installation.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 3: Over the guard
Source situation: A Spanish risk note discusses reaching over the top of a fence toward a robotic tool, while the English draft describes distance through a mesh panel.
Translation decision: Use the source route, over the protective structure, and retain the associated vertical and horizontal quantities.
Review and control: Return the draft for technical review. Confusing over and through may select the wrong underlying assessment even if the numeric dimensions are copied correctly.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 4: Maintenance hatch
Source situation: An Italian instruction says a hinged hatch is secured during automatic operation but open for isolated maintenance.
Translation decision: Keep both operating states and their conditions, including the energy-isolation language.
Review and control: Do not present the normal-operation reach distance as proof of safety while maintenance personnel have removed the barrier.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 5: A catalogue photo
Source situation: A sales brochure advertises a guarded conveyor, but the inspection note refers to an optional side panel not shown in the supplied image.
Translation decision: Translate the option and its installation status explicitly rather than assuming it is included.
Review and control: Ask for the project-specific configuration. Catalogue imagery cannot replace the as-built record.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 6: A plus-minus tolerance
Source situation: A fabrication document specifies a gap with a plus-minus manufacturing tolerance; the salesperson supplies a rounded single number in another language.
Translation decision: Keep the nominal value, tolerance signs and units in separate fields.
Review and control: The acceptance assessment depends on which realised dimension is being considered; do not replace a tolerance with a vague expression such as approximately.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 7: A 0.5-inch conversion
Source situation: An American vendor lists a dimension in inches while the receiver uses millimetres.
Translation decision: Retain 0.5 inch as the controlled source and clearly label any converted millimetre display as a secondary value.
Review and control: Do not round away the significance of the original number or let the conversion become a new approved limit.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 8: An interlock claim
Source situation: A Dutch technical note says a guard is interlocked, while a translated specification claims it is both fixed and interlocked.
Translation decision: Translate the actual mechanism and refer its safety-function characteristics for separate verification.
Review and control: An interlock and a fixed barrier are different concepts; adding both creates a potentially misleading requirement.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 9: Upper and lower limbs
Source situation: A report says foot access is blocked at a base opening but leaves hand access along the adjacent frame unexamined.
Translation decision: Preserve the foot-focused scope and any caveat about upper limbs.
Review and control: Do not state that the machine’s hazardous area is inaccessible by all routes. The broader assertion exceeds the evidence.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 10: Children in a public venue
Source situation: A demonstration machine will appear at a family exhibition, but the factory safety-distance document assumes operators aged fourteen and older.
Translation decision: Retain the scope wording and flag the venue context to the responsible safety professional.
Review and control: Do not generalise the population assumptions to young children simply because the machine is exhibited rather than sold.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 11: A revised drawing
Source situation: Revision C moves the protective panel and changes an arrow reference, while a prior translation still cites Revision B.
Translation decision: Update only the new project translation and maintain a revision correspondence table.
Review and control: Do not edit the previous released source or treat the new arrow as proof that an old accepted machine was retroactively modified.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 12: A warning sticker
Source situation: A vendor proposes a no-reaching warning label as its response to a mechanical access issue.
Translation decision: Translate the vendor proposal as a proposal and distinguish information from physical guarding.
Review and control: Do not announce that the reach hazard was eliminated, and do not remove the pending engineering assessment.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 13: A risk note on heat
Source situation: A protective fence blocks reaching into a hot zone but a separate record discusses radiant heat escaping the area.
Translation decision: Preserve the separate hazard mechanism and the limitation of reach-distance controls.
Review and control: The target text must not present access prevention as proof that heat exposure is adequately controlled.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 14: Different decimal separators
Source situation: An English drawing uses 1,200 mm, while a target-language reader might interpret a comma as a decimal marker.
Translation decision: Use an approved numeric presentation convention, cross-check source scale, and avoid ambiguous punctuation.
Review and control: A number should always be recoverable from the controlled drawing; an apparently cosmetic formatting change can become a substantial measurement error.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 15: A temporary bypass
Source situation: A service log records that a guard was bypassed during testing under a controlled procedure.
Translation decision: Translate the past event and the documented restrictions without converting it to normal recommended practice.
Review and control: The record is not a general permission to operate with a bypass, even if the test was completed without incident.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 16: A factory acceptance note
Source situation: The form says a guard dimension was checked; the translated certificate says all safety distances are certified.
Translation decision: Limit the statement to the measured feature and recorded inspection outcome.
Review and control: Ask the signatory to confirm the intended claim. An inspection checkbox is not automatically system-wide certification.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 17: A missing table number
Source situation: A quotation cites a distance from “Table 4” but the file bundle does not contain the reference standard.
Translation decision: Keep the citation without inventing its contents, and request the controlled licensed document.
Review and control: Internet quotations may omit conditions; substituting them in a regulated deliverable would break traceability.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Case 18: A mesh repair
Source situation: An engineer writes “repair pending” after a damaged panel was photographed, while a workflow tool labels the ticket resolved.
Translation decision: Preserve the actual repair status and explain any contradictory administrative status in a review comment.
Review and control: Do not silently choose the more reassuring interpretation. The engineer must establish whether the repair occurred and was verified.
What makes this case worth teaching is the difference between preserving a documented observation and authorising a safety conclusion. A readable translation should carry the exact physical relationship and the stage of the engineering decision, while the accountable reviewer considers the full equipment context. That separation prevents a short caption, convenient synonym or confident marketing phrase from displacing the underlying assessment.
Essential terminology for bilingual machinery safety files
Hazard zone
A space where a hazardous machine mechanism or condition may expose a person to harm; identify it on the drawing. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Protective structure
Physical barrier whose function and actual construction must be specified, not assumed from the word fence. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Reach-over path
A possible access route across the top of a protective structure; not interchangeable with reach through. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Reach-through path
A possible access route through an aperture; the opening geometry and hazard location remain relevant. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Aperture
An opening in a protective structure; retain its shape, size and installation state. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Nominal dimension
Specified design value, distinct from an actual site measurement. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
As-built measurement
Dimension recorded after construction or installation, with its source and date. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Datum
Reference location or plane from which a measurement is taken. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Residual risk
Remaining risk after controls are considered, not a declaration that risk is absent. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Corrective action
An intended or completed change whose stage and evidence must remain explicit. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Verification
Checking an established criterion by appropriate evidence; does not necessarily establish whole-system acceptance. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Scope condition
A population, operating state, equipment condition or jurisdiction that limits a statement. In a controlled translation, pair this meaning with the exact drawing, clause and source sentence. Do not assume that a familiar everyday synonym carries the same design or safety implication.
Questions translators and manufacturers frequently ask
Can a translator approve a safety distance?
No. A translator can faithfully communicate a requirement, calculation or observed dimension, and identify inconsistencies. A technically qualified and authorised person must make the engineering and compliance decision using the complete machine and relevant requirements.
Does using ISO 13857 mean every machine hazard is addressed?
No. Its scope concerns preventing access to hazard zones through safety distances under stated conditions. Emissions, heat, dust and other hazards may require separate controls and assessments.
Should I reproduce a proprietary table in my translation?
Use the client’s licensed, controlled source and applicable permission. This educational guide does not reproduce the numerical tables. Never reconstruct absent values from memory or isolated online excerpts.
What if the customer requests a more confident wording?
Ask which document authorises the stronger claim. If the source records a pending measure or partial inspection, changing it to fully compliant would alter the meaning rather than improve the language.
How do I handle imperial dimensions?
Preserve the original controlled measurement, convert only under an approved process, label any derived number clearly and retain tolerances and direction signs.
What if the source has contradictory drawings?
Log the discrepancy and request an approved revision. A translator should not select whichever drawing happens to provide a better-looking compliance outcome.
Further learning and official reference
Check the official ISO catalogue entry for the edition and scope, and consult the actual standard and qualified safety personnel for design and assessment. Technical translation is one specialist application of the wider art of transferring meaning; vocabulary work helps keep a stable termbase and careful English reading helps distinguish a requirement from a conclusion.
Official reference: ISO 13857:2019 catalogue. Related eduKateSG reading: Master Art of Translation, Vocabulary Learning Hub and How English Works.