Cable Tray & Containment 2D/3D Virtual Lab V9

VERSION 9 · verified geometry and support loads · Cable inventory first · project tray specification · support and seismic calculation
MEPVIRTUAL | CONTAINMENT CALCULATION
Engineer / project: __________________________   Drawing / revision: __________________________

2D front section

Select cables to see edge-to-edge spacing.

3D interactive segment

Loading 3D viewer… 2D and calculations remain available.
Cross-section fill 0%
Total mass 0 kg/m
Single-layer width 0%
Project criteria status PENDING

Step 1 · Cable inventory

Select cores and conductor size above, or select an item from this complete catalogue.
ALL SIZES: 1C–5C × 1.5–630 mm². Scroll through the grouped list, select a cable, then press “Add selected cable to calculation”. Selection alone does not add it.
Cable / designationOD (mm)kg/m eachQtyContribution kg/mAction
Quantity defaults to 1. No need to enter a custom cable if the grouped library contains your construction. Cable nominal conductor size is NOT the outside diameter. Illustrative OD and mass must be verified against the selected manufacturer datasheet. Edit each row using the selected cable datasheet.

Step 2 · Containment configuration

Auto sizing begins with nominal W × H. Confirm internal free dimensions before the result can PASS.
Preset follows selected size. Check product drawing; may differ from usable internal H.
The size dropdown is generated from the editable product schedule below. Select only a size stocked and approved for this project. Enter actual unobstructed internal dimensions from its datasheet. SWL must be taken from the manufacturer for the chosen support span and installation orientation.

Available product schedule & automatic tray selection

Add a cable to obtain a recommended stocked size.
Optional: leave “Add width” and “Add side height” empty if the available shortlist already covers your product. Schedule is an illustrative shortlist of nominal sizes, not a manufacturer catalogue or a standard-defined universal size range. Enter real supplier references to verify availability. Replace it with approved supplier products. Empty OD/mass or missing SWL cannot produce a complete approval.
Approved stocked nominal sizeProduct / supplier referenceAvailabilityAction

Project containment specification

Automatically applies to perforated cable trays. Ladder and trunking products require their own approved project specification.
Project specification: hot-dip galvanized steel cable trays with documented UV suitability; minimum 50 mm side height; return flange minimum 9 mm; proprietary accessories and factory-made radiused bends/tees only. Material grade, finish process, UV suitability, bend radius and part references must be checked against the approved submittal. Custom width/height does not waive these conditions.

Step 3 · Supports and seismic coordination

Default 1.00 × cable kg/m; add required allowance per project.
Default 0 for cable-only screening. Enter the selected product mass, cover and fitting allowance before final support approval.
Enter cable inventory, rated load at a known support span and route length to calculate support count.
Load output includes N/m and estimated kg equivalent per support for an ideal straight uniformly loaded run. Actual bracket/anchor capacities and local loads still need structural verification. The lab selects the longest manufacturer rated span that carries the entered design load. It does not calculate anchors, cantilevers, dynamic seismic force or seismic bracing design. Brace counts use approved maximum intervals entered above and assume supports/braces at both ends of a straight run; fittings, bends, junctions, heavy terminations and site constraints may require more.

Step 4 · Optional project and site criteria

Site clearance checks are optional until applicable. Leave the boxes unticked for cable tray sizing alone. Tick them when the actual route requires an access or power/ELV separation review. 40% / 50%, 1D, 250 mm and 300 mm are editable design assumptions supplied for this exercise. This lab does not certify these as blanket DEWA, BS 7671 or BS EN 50174-2 limits. Verify current project specifications, installation method and authority approval.

Formula engine and worked values

Area fill is a screening metric. Round cable packing, heat dissipation, cable grouping derating, bending radius, pulling access, segregation and support design require separate checks.

Real-time project criteria matrix

CheckActualCriterionResult

DEWA and BS 7671 inform the project design review. The values below are user entered criteria, not a formal authority or standards compliance certificate. PENDING means evidence or a measured value is missing.

Engineer’s Notes | Site practice

Power cable spacing: Review thermal grouping and manufacturer instructions. The 1D gap is an editable project target, not an asserted universal DEWA minimum.

Soffit access: Check pulling, supports, covers and maintenance access. 250 mm is the initial project target here, subject to drawings and site constraints.

Power and data segregation: Assess EMC route, barriers, cable type and project specification. 300 mm is a starting criterion, not a universal BS EN 50174-2 value.

Tray or ladder: Choose by cable mass, span, support conditions, ventilation and manufacturer load data. A cable size alone does not determine containment type.

Installation method statement · field template

Scope: HD G.I. cable tray routes, proprietary fittings, supports, bonding and cable loading. Prerequisites: approved coordinated drawings, material submittal, safe work permit, access equipment and structural fixing approval. Responsible persons: site engineer sets out, supervisor controls installation, QA/QC engineer checks hold points, consultant witnesses the agreed ITP stages.

  1. Document approval: coordinated shop drawings, approved tray and accessory submittals, product catalogue, SWL/span table, cable schedule and risk assessment.
  2. Set out routes and levels; coordinate with structure, fire compartments, HVAC, plumbing and maintenance clearances before drilling.
  3. Inspect delivery for HD G.I. finish, UV protection documentation, side height, return flange ≥9 mm, burr-free edges and matching proprietary fittings.
  4. Mark support positions using the approved span schedule and additional supports near bends, tees, risers and equipment. Confirm anchors and slab capacity with structural design.
  5. Fix supports and install straight runs, factory radiused bends and tees; reject sharp-edge or site-fabricated accessories. Protect any approved cut edge per manufacturer procedure.
  6. Bond tray sections, install expansion arrangements, fire stopping and segregation as approved. Lay cables within bend-radius, pulling and loading limits.
  7. Inspect, photograph, rectify and record as-built routes before concealment. Obtain required inspection releases.

Safety: isolate adjacent live services; verify drilling zones; use approved access equipment and PPE; control sharp edges, dropped materials and manual lifting. Stop work for conflicts or undocumented anchors.

Quality manual / ITP · hold points and records

Control: use the current approved drawing revision and traceable product batch. The QA/QC engineer records inspections, raises nonconformances for deviations, verifies corrective action, and retains approvals, test records, photographs and as-built drawings for handover. Hold points require the agreed consultant release before covering the work.

StageAcceptance evidenceRecord / release
Pre-installationApproved drawings, method statement, material submittal and load calculationsConsultant acceptance before works
Material receiptHD G.I., UV suitability, ≥50 mm sides, ≥9 mm return, proprietary radius fittingsDelivery inspection / certificates
SupportsSpan-specific SWL, route load, fixing/anchor design and seismic design if applicableSetting out inspection / anchor records
InstallationNo fabricated/sharp fittings; bonding, safe cut edges, pulling clearancesProgressive inspection and photos
CloseoutContinuity and inspection records; fire stop, cable schedule, as-builts and O&MFinal acceptance / snag closure

Inspection and commissioning handover

  1. Verify tray make, gauge, finish, edge protection and approved shop drawings.
  2. Record bracket spacing, fixings, support load rating and manufacturer span-specific SWL.
  3. Check bonding continuity and earthing design, including joints and expansion sections.
  4. Check separation, service access, fire stopping and penetration details in the field.
  5. Confirm cable datasheets, bend radii, cleats, pulling method and thermal grouping calculation.
  6. Photograph as-built routing and record inspection and test results.

Live engineering summary

Basis of design and cable schedule

DesignationOD (mm)kg/mQty

Project specification and submittal checks

Method statement and quality records required

Submit approved shop drawings, method statement, risk assessment, product certifications, factory fittings catalogue and load calculations before installation. Inspect materials, supports and anchors before cable installation. Record HD G.I./UV suitability, flange/side dimensions, proprietary radius fittings, support spacing, bonding, fire stopping, as-builts and inspection releases. The QA/ITP and field checks are available on the Engineer’s Notes tab.

Support and seismic coordination

Criteria review

CheckActualCriterionResult

Sign-off: __________________________ Date: __________________________
About this lab: Cable Tray Sizing, Fill & Support Layout Calculator

Cable Tray Sizing, Fill & Support Layout Calculator

Explore cable tray sizing, cable inventory, containment arrangements and support coordination with interactive 2D and 3D engineering diagrams.

Topics you can explore

  • Cable tray fill calculation
  • Cable tray support spacing
  • Electrical cable containment

Practical engineering example

For three large multicore cables, enter their actual outer diameters and arrangement. Check spacing, usable tray width, weight and support duty together.

Developed by Eng. Mannan Maqsood. Verify design outputs against current project requirements and the applicable authority and manufacturer data.

© 2026 Eng. Mannan Maqsood | Engineering Excellence Through Interactive Labs

VERIFY ALL FIGURES AGAINST CURRENT MANUFACTURER DATASHEETS AND LOCAL AUTHORITY REQUIREMENTS BEFORE DESIGN SIGN-OFF.