Determination of post-impact access
Annex C is informative. It deals with determining post-impact access. It adds no requirement, but it asks the question the test report does not answer: can people and equipment reach the protected side after the impact?
Basis. This annex is informative. The clause number and defined terms are the standard's; the explanation is our own.
This annex is informative. It explains and illustrates; it does not create a requirement. A finding cannot rest on it alone. The normative clauses are 4 to 8 and Annex A.
What annex C asks
Annex C is titled Determination of post-impact access and is informative. It addresses the practical question of how access to the protected side is gained or blocked after a vehicle impact. The public preview shows the title and its place in the annex set, but not the method. This record therefore states the purpose the title establishes and does not invent a procedure. The clause sits after the test method and before the post-impact measurement annex, which is a fair guide to its role: the test tells you what the barrier and the vehicle did, and the access question tells you what that means for the people and the response force behind it.
Why it matters
A barrier that stops a vehicle can also block the route that emergency services, maintenance crews or the people inside the protected area need. The post-impact scene may include a displaced barrier, a vehicle across the access, debris and a foundation that has moved. Those are operational facts that the rating does not capture. The buyer who plans only for the impact and not for the access will discover the gap on the day, when the response is already late.
What good looks like
Walk the protected side and the access routes with the site operator. Record how people and vehicles get in and out, and what the impact could block. Add the access check to the site emergency plan and to the barrier maintenance plan. Where the barrier is movable, test the manual release and the power failure procedure. Where the barrier is fixed, record the alternative access.
Evidence an assessor asks for
The reviewer will ask how the response reaches the protected side after an impact. A rating that stops the vehicle but blocks the ambulance has not delivered the outcome the site needs.
- Access plan The protected side, the access routes and the alternative route after an impact
- Post-impact scenario A short description of the displaced barrier, vehicle and debris and what each would block
- Emergency plan link The access check written into the site emergency plan
- Movable barrier procedure The manual release and power failure procedure, with a test record
Where it commonly fails
- The only access to the protected side runs through the barrier
- The manual release of a movable barrier has never been tested under power failure
- Debris is expected to block the access and no alternative is planned
- The annex is cited as a requirement when it is informative
What to do before the amendment publishes
Add the access check to the site emergency plan and test the movable barrier release before the next assurance review.
Read across
- 1 Scope
- 4 VSB performance requirement
- 6.7 Test procedure
- B Example product and foundation drawings
- D Post-impact foundation and VSB measurements
← B Example product and foundation drawingsD Post-impact foundation and VSB measurements →