The register

16 clauses, from scope to the product information

Every page is written from the published base standard, the public preview and the NPSA rating guidance. Each one states the requirement in our words, the evidence an assessor asks for, the common failures and the work to do before the amendment publishes. Start where the barrier is, not where the page numbers are.

16 clause records111 evidence lines100 failure lines11,169 authored words

Start at clause 4 The test method Annexes

1. The frame of the standard

Clause	Record	The answer in one line
1	Scope	The standard rates a barrier against one unmanned vehicle impact and stops at 25 metres of penetration. It is not a design guide, a certification scheme or a blast standard.

2. The frame of the standard

Clause	Record	The answer in one line
2	Normative references	Six documents are normative: the vocabulary, two concrete standards, two concrete testing standards and the photographic instrumentation standard.

3. The frame of the standard

Clause	Record	The answer in one line
3	Terms and definitions	The definitions fix the front face, the datum, the penetration distance and the debris threshold. Most rating disputes are arguments about those four things.

4. The performance requirement

Clause	Record	The answer in one line
4	VSB performance requirement	When tested under Clause 6, the barrier must stop the vehicle at the datum line, redirect it to the unprotected side, or halt it beyond the line so that it cannot drive on. A result beyond 25 metres earns no rating.

5. The performance requirement

Clause	Record	The answer in one line
5	VSB documentation	The manufacturer supplies a documentation set with the barrier, and the tested barrier must conform to that set. A site installation that differs from the tested configuration is outside the rating.

6. The test method

Clause	Record	The answer in one line
6.1	Apparatus	The test needs a test vehicle, a propulsion method, calibrated mass, angle and distance equipment, and a camera plan. Measurement accuracy is specified, so a guess is not a result.
6.2	Test site	The test site must give the vehicle a free run, a defined impact geometry, and enough space behind the barrier to measure penetration and debris.
6.3	Impact geometry	The test sets a target impact point, an initial contact point and an impact angle greater than zero and up to 90 degrees. At 90 degrees the two points coincide.
6.4	VSB preparation	The barrier is prepared for test in its intended installation, with its foundation, soil, fixings and markers. The preparation is part of the test condition, not a setup detail.
6.5	Test vehicle preparation	The test vehicle is one anyone can buy, with the chassis and front structure as the maker built them. Its mass, ballast, dimensions, condition and datum point are recorded.
6.6	Impact speed	The impact speed is how fast the vehicle is moving, free of the winch, just before first contact. It is measured, not assumed from the propulsion setting.
6.7	Test procedure	The procedure runs from pre-impact data through the impact to impact data, post-impact data and disposal. Each stage has to be recorded, not reconstructed later.
6.8	Test report	The report records the test house, the article, the vehicle, the conditions, the results and the optional assessments, and closes with a summary of results.

7. The performance rating

Clause	Record	The answer in one line
7.1	Performance rating, general	A rating is awarded only for a test run under Clause 6, only for the conditions tested, and never where penetration exceeds 25 metres.
7.2	Classification code	The code packs the barrier type, test type, mass, vehicle class, speed, angle, penetration and debris into one line. Every part changes the meaning.

8. Product and claim

Clause	Record	The answer in one line
8	Product information	The product information describes the barrier, its foundation, its installation and its rating, so that the tested article can be recognised on site.

Reading the verbs. Only "shall" creates a requirement. "Should" is a recommendation, "may" is a permission and "can" is a capability. The register keeps the verb visible so a finding and a suggestion are not confused. Clause 1 draws the boundary of the standard.

THE RECORD THIS IS BUILT FROM

Read from the public record, not invented

Every clause answer on this site points to the official record or the public preview behind it, so you can check any line yourself. The register holds 25 records, 111 evidence lines and 100 common failure lines. The dates come from the ISO stage record. The amendment text is not public, and this site does not describe what it changes.

16 CLAUSES

One page per clause

The requirement in our words, the evidence an assessor asks for, the common gaps and what to do before publication.

Open the register

9 ANNEX RECORDS

Normative and informative, labelled

Annex A is normative and carries the measurement controls. Annexes B to D are informative and say so.

Open the annexes

ONE STAGE RECORD

No invented date

Stage 50.00 is recorded on 8 October 2026. The planning date is an estimate and is labelled wherever it appears.

Read the record

The base standard is published. The amendment text is not public at FDIS. Each record cites the public source it comes from. Where the public record is silent, the page says so.