Rebar detailing, anchors, and inspections.
Reinforcement placement decides whether a crash rated bollard foundation performs like the test article. Use clear bar schedules and tags, maintain cover with proper spacers, and check laps/bends against design (333). Anchor templates must align with setting-out (612) and rating-critical dimensions (421). Plan corrosion protection (361–364) and inspection hold points (714), record photos, and update as-builts (731) before pour (624). Include one-sentence context that naturally links upward to the parent hubs (this section and the chapter hub). Add SIRA context with a link to SIRA Bollards (UAE) when relevant. Link installation pages only if helpful: What to Expect and Installation Guide.
Important: This is a general guide. For live projects we develop a tailored
Method Statement & Risk Assessment (MS/RA) and align with authority approvals (e.g., SIRA) where in scope.
621.1 Bar schedules & tags
Issue clear schedules with bar marks tied to drawings (931). Accurate tags keep HVM bollard foundations consistent with crash rated bollard tests.
Bar schedules should reference the exact CAD/BIM standards (931) so each bar mark is unambiguous: size, shape code, length, bends, and quantity. Tie every mark to a sheet and detail callout to avoid site interpretation. Use durable tags on site—waterproof and schematic-matching—to prevent mix-ups during fixing and inspection.
Maintain traceability from bar bending lists to delivery dockets and the asset register (732). Where the design relies on test-matched geometry, add a note that the reinforcement forms part of the rating-critical dependencies (421). Minor “field tweaks” to bars can invalidate comparability with the tested system.
| Aspect | What matters | Where to verify |
|---|---|---|
| Performance | Tested system (bollard + footing) | How to read ratings |
| Geometry | Bar marks match detail, no substitutions | Foundation typicals |
| Controls | Hold points + photo evidence | ITP · Evidence standards |
621.2 Cover & spacers
Specify cover blocks/spacers that won’t float. Correct cover preserves HVM bollard durability and crash rated bollard performance (333).
Set cover to match design exposure class (hot, saline, splash) and foundation type (332). Use non-absorbent, strength-rated spacers that suit bar size and substrate. Plastic “chairs” or concrete blocks are fine when sized and tied correctly; avoid makeshift stones or timber that shift during pouring & vibration (624). Spacers must not create pathways for corrosion or reduce effective cover at edges and corners.
Before the pour, run a datum & alignment check (626) and visually verify cover with a simple depth gauge at representative points, especially near the rating-critical socket region.
621.3 Laps & bends
Check lap lengths and bend radii against design notes. Proper laps prevent weak zones beneath crash rated bollard sockets.
Follow design lap ratios and bar class rules; where congested, stagger laps to avoid “soft” planes. Maintain minimum bend diameters to prevent bar micro-cracking, and confirm that bends clear embedded items and sleeves & penetrations (622). If laps intrude on the anchor group cone or socket wall, request a detail revision—do not trim or cold-bend onsite without design approval.
Where continuity bars pass near foundation design checks (333), verify lap zones won’t compromise the concrete’s local capacity.
621.4 Anchor bolts & templates
Use rigid templates aligned to 612 datums. Template accuracy keeps HVM bollard anchors within rating-critical tolerances (421).
Anchor layouts must be fixed using a steel template plate with hole positions CNC-matched to the bollard base. Set to the surveyed datums & benchmarks (612); verify X/Y and rotation before concrete. For socketed products, check the anchor group against the manufacturer’s foundation typicals (933) and the page on rating-critical dependencies (421).
If post-installed anchors are specified, mark proof-test requirements (load, duration) and acceptance bands, then record results in the witness/inspection forms (918). For cast-in bolts, secure with lock-nuts and bracing so they cannot drift during vibration (624).
621.5 Corrosion protection
Galvanize or epoxy where specified; avoid coating damage. Protection extends HVM bollard life in hot, saline sites (361–363).
Map the protection system to site exposure: hot/saline/coastal needs higher cover, materials selection (361), and compatible rebar coatings. Avoid mixed-metal traps at anchors (364) by using isolation washers and sleeves where appropriate. After fixing, repair coating holidays per manufacturer data; keep threads and bearing faces free where torque is required.
621.6 Inspection hold points
Add pre-pour checks in the ITP (714). Hold points verify crash rated bollard reinforcement before concrete.
Define a pre-pour ITP (714) hold point that covers bar sizes/marks, cover, lap/bend compliance, anchor position, and cleanliness. Use a witness checklist (918) and a photo/redline logbook (937) to capture evidence. No pour (624) until records are complete and accepted.
621.7 Nonconformance fixes
Log NCRs (719), cut/replace bars, re-inspect. Rapid fixes protect HVM bollard programme.
Record issues using the NCR process (719): describe, contain, correct, and prevent recurrence. Typical fixes include replacing wrong bar sizes, adjusting cover with correct spacers, or resetting anchors via template. All fixes return to the same hold point for re-inspection, and any drawing change is captured through change control & versioning (537).
621.8 Photos & sign-offs
Capture tagged photos and sign sheets (716). Evidence speeds crash rated bollard approvals (938).
Take a wide→detail photo set that shows tags, cover gauges, lap/bend zones, and the anchor template relative to survey marks. Use geo-tagging where permitted and file in the agreed archive (939). Secure sign-offs on the same day to keep pour windows and witness bookings aligned (918, 624).
621.9 As-built updates
Update bar schedules and anchor coordinates (731). As-builts keep HVM bollard traceability intact.
Update the as-built drawings (731) with any approved deviations: bar marks, lap locations if relocated, anchor coordinates/levels, and photo references. Ensure the updated model syncs with the submission pack guidance (938) so reviewers can quickly match evidence to drawings during SAT close-out (638).
Related
External resources
- FEMA 426 — Reference Manual to Mitigate Potential Terrorist Attacks
- ASTM F2656 — Crash Testing of Vehicle Security Barriers (overview)
- NPSA — Hostile Vehicle Mitigation (HVM) Guidance
621 Rebar Cages & Anchors — FAQ
What cover should I specify for a coastal, hot site?
Follow the design exposure class and durability strategy (361–363). In hot, saline locations increase nominal cover per the designer’s notes, use non-absorbent spacers, and protect anchors against galvanic risks (364). Verify with a pre-pour ITP hold point.
Can I adjust bar bends onsite to “make it fit”?
No. Cold-bending onsite risks micro-cracks and can breach rating-critical geometry. Raise an RFI; get an approved detail or replacement bars. Record any change via the change-control process (537).
Do anchor bolts need proof-testing?
If post-installed anchors are used, proof-testing is typically required with defined loads and durations. Record results on witness forms (918) and keep within acceptance bands set by the designer/manufacturer.
Which photos are essential before the pour?
Capture a wide→detail set showing bar tags, cover gauges, lap/bend areas, and the template relative to survey marks. File them per the evidence capture standards (716) and link to drawing references for SAT close-out (638).