Structured calcs reviewers can trust.
Calcs should be easy to follow and verify. Use this template to present assumptions, loads, soil data, and design checks step-by-step, with references to rating reports and drawings. Include sensitivity, deflection/set allowances, and summary tables. A clean pack shortens review cycles and links crash rated bollard performance to buildable foundations. 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.
914.1 Contents list
Index loads, foundations, spacing calcs. Tie to 331–333, 322, and drawings (931).
Open with a one-page index that mirrors the review sequence: loads and assumptions, impact loads & foundations (331), foundation checks (333), and clear-gap calculations (322), then CAD/BIM references (931). Use consistent NCR routing and page numbering so reviewers can quote exact locations.
Include a pack summary (scope, site, design basis), followed by a clickable Table of Contents with page codes. Cross-reference your GA numbers to the CAD/BIM Standards (931) so the model/drawing set is instantly traceable.
| Aspect | What matters | Where to verify |
|---|---|---|
| Performance | Tested system (bollard + footing) | Crash Ratings Explained |
| Operations | Duty cycles, fail-state, safety | Installation Guide |
914.2 Inputs & references
List rating parameters, soils, materials, standards (411–416, 423, 361). Inputs justify crash rated bollard selections.
Capture the standards & terminology you rely on (ASTM/IWA/PAS), the product’s rating string, test report IDs, and drawing/model references. Summarize ground model data (strata, groundwater, unit weights, soil effects), plus materials (steel grade, concrete fck, rebar grade).
Add an assumptions register, design sensitivity analysis scope, and materials selection (361). Link out to authoritative rating references and simulation correlation notes (416) if used.
914.3 Load derivations
From rating energy to design actions (331.2). Show assumptions and limits.
Translate crash test energy into design actions at the foundation. State impact speed, impact angle, and governing vehicle mass envelope, then show how you derive lateral force, shear, and overturning moment. Where applicable, include partial safety factors and any conservatism you’ve adopted.
Spell out model boundaries (e.g., capture height, torsional effects) and justify simplifications. If you use calculators, reference the Foundation Moment Quick-Estimator (923). Summarize outputs in a compact table (ULS) and an expected deflection/set table (SLS) linked to deflection vs. permanent set (314).
914.4 Foundations checks
ULS/SLS, punching, settlement (333). Include rebar details.
Organize checks by limit state: ULS for shear/bending/overturning and SLS for rotation/settlement. Show punching shear and bearing pressure with soil reactions and stiffness assumptions.
Include reinforcement: bar sizes, spacing, cover, laps, and anchorage; note cage tolerances and any base rotation limits. If a grade beam or combined footing is used, justify group effects and link to foundation typicals (933). Provide calculation snapshots tied to drawing callouts.
914.5 Clear-gap math
Deflection, set, tolerances (314, 322). Protects HVM bollard acceptance (232).
Prove pedestrian protection by calculating the maximum clear-gap under elastic deflection and permanent set. Show tolerance stack-up (fabrication, install, ground movement) and compare to the site rule in Spacing rules (232) and Clear-Gap Calculations (322).
Document the acceptance band and any rotation limit. Where the frontage is sensitive (near doors, glazing), tie your numbers to frontage protection patterns (234).
914.6 Utilities allowances
Depth classes and clearances (243). Options for shallow bases (244).
State the planned foundation depth class and required offsets to red-zone utilities. Cite the utility survey class and any proving (e.g., utility search (241), detection (242), trial pits). Record the utility avoidance zone used in the design model.
If clashes exist, present engineered alternatives (e.g., shallow foundations (244), micro-piles, retrofit frames). Note any authority constraints or SIRA implications where applicable.
914.7 Drainage interfaces
Sump/outfall sizing links (334, 245). Prevent ingress risks.
Describe how water is kept out of sleeves and pits: sump sizing, outfall route, and backflow protection. Reference the drainage design guide (334) and calculator for drainage sump sizing (927).
Record groundwater level, buoyancy checks for chambers, and maintenance access. Specify details like weep holes, filters, and inspection points so the system is buildable and serviceable.
914.8 Reviewer checklist
Page IDs, signatures, NCR path (719). Speeds approvals (717).
End with a one-page reviewer checklist: page code, revision, approver block, and a submission path (717). Include NCR handling (719), evidence types, and a contacts box. Provide space to record witness signature block details where required.
List hyperlinks to the drawings/model, certificates, and calculators used so approvers can validate quickly. Add a short reader sequence (review) so everyone follows the same path.
914.9 Export & naming
Bundle as single PDF with 911-compliant name. Ready for 938 packs.
Export the whole pack as a single, bookmarked PDF. Use the File Index & Naming Rules (911) and include a snapshot PDF in the transmittal.
For submission, mirror the structure in Submission-Pack Guidance (938) and reference the calculators page (920) used to generate intermediate numbers. Ensure the canonical file name matches the transmittal and drawing schedule.
Related
External resources
914 Calculations Pack Template — FAQ
What sections must every HVM calculations pack include?
At minimum: a contents list, inputs & references, load derivations, foundations checks (ULS/SLS), clear-gap math, utilities allowances, drainage interfaces, a reviewer checklist, and an export & naming page. Cross-link to drawings and rating evidence.
How do I prove clear-gap compliance if tolerances are tight?
Show a tolerance stack-up (fabrication, installation, ground movement) and calculate worst-case elastic deflection and permanent set. Compare the maximum opening to the site’s clear-gap rule and reference the spacing rules page.
What evidence do reviewers expect for foundation design checks?
Provide soil parameters and justification, ULS shear/bending/punching results, SLS rotation/settlement limits, and rebar details that match the drawings. Include calculation snapshots and page codes so results are traceable.
How should I name and export the pack for submission?
Export a single bookmarked PDF and name it per the File Index & Naming Rules (911). Mirror the Submission-Pack Guidance (938) so the authority or client can review in the intended sequence.