Cable tray and ladder sizing

Size cable tray and ladder from your floor plans.

Import a cable schedule, draw tray or ladder routes over the floor-plan PDF and calculate every connected route section. Export an Excel workbook and a marked-up PDF.

30-day free trial · full features · one concurrent project · no card required

Demo project: ground-floor ladder route 01600 mm ladder selected
FillSizer calculation for demo ground-floor ladder route 01, showing the contributing cables and selected 600 mm ladder
6 circuitsRequired cable width: 573.38 mmSpare-capacity target: 25%
Inside FillSizer

See the route, cables and calculation together.

Select a route section to see its cables. Open the result to see the inputs, spare-capacity target and selected tray or ladder size.

  1. 01
    FLOOR PLAN

    Draw over the floor plan

    Set the drawing scale from a known distance, place equipment and draw tray or ladder routes.

  2. 02
    ROUTE

    See every cable on a route section

    Ground-floor ladder route 01 carries six circuits in this demo project.

  3. 03
    CALCULATION

    Check the result

    The cables require 573.38 mm of ladder width. FillSizer selected a 600 mm ladder after applying the 25% spare-capacity target.

  4. 04
    IMPORT

    Trace the source

    Each imported circuit keeps its source file, sheet and row.

Floor plan editorRoutes drawn over a scaled floor-plan PDF
FillSizer floor-plan editor showing demo routes drawn over a scaled floor-plan PDF
Sizing resultsCalculation details for ground-floor ladder route 01
FillSizer sizing results showing the calculation details for demo ground-floor ladder route 01
Source file, sheet and rowFloor, route and route sectionCables, spare capacity and selected sizeExcel workbook and marked-up PDF

Built by an electrical engineer with 15 years in building-services design. Automated tests check that calculation results stay consistent after software changes.

Try a fill check

Add cables and see the result change.

Choose the tray width and one or two cable layers, then add cables. Tray fill and spare capacity update immediately.

INTERACTIVE CABLE TRAY DEMO0 CABLES
Tray width (millimetres)
Cable layers
Add a cable
 
300 mm
0%Tray fill
100%Spare capacity (target 25%)
0 / 300 mmTotal cable width used
FITS

This example uses sample cable sizes and a 25% spare-capacity target. FillSizer can size from cable outside diameter or the width of each cable fixing (cleat), using the data saved in your project.

How it works

Import. Draw. Calculate. Export.

Five steps, with the schedule, routes and results kept in one project.

  1. 01

    Import the schedule

    Import an Excel workbook or comma-separated text file. Match its columns once; each circuit keeps its source file, sheet and row.

    CIRCUITS
  2. 02

    Draw the route

    Set the floor-plan scale from a known distance, place equipment and draw tray or ladder routes over the PDF.

    ROUTES
  3. 03

    Calculate the project

    Size every connected route section from the circuits assigned to it.

    RESULTS
  4. 04

    Review the issues

    Open failed results or sections with low spare capacity and see which cables caused them.

    ISSUES
  5. 05

    Export the record

    Create an Excel workbook and a marked-up drawing PDF.

    EXCEL AND MARKED-UP PDF

Current scope: submain power cables on cable tray and ladder. Cable basket, trunking and cable sizing for final circuits are on the roadmap.

Why switch

From cable schedule to marked-up drawing, in one connected project.

Excel and PDF normally sit beside each other. FillSizer connects the schedule, equipment, floor plan, routes, calculations and exports. A tick means the capability is built in, without custom links, formulas or registers.

Features built into an Excel and PDF workflow compared with FillSizer
FeatureExcel workflow + PDF markupsFillSizer automated, auditable workflow
01One connected schedule-to-drawing workflowImport circuits, use the floor-plan interface to route and size every connected tray or ladder run, then export Excel and a marked-up PDF.
02Place equipment and route supported circuits automaticallyImport a FillSizer template or supported ElectricalOM cable schedule to create the equipment list. Place equipment on the floor plan, draw the tray or ladder network, then let FillSizer find routes for supported circuits.
03Click a circuit to see its complete routeSelect a circuit to highlight every route section it uses across the project. Select a section to list its cables; results, issues and equipment link back to the drawing.
04Marked-up PDF for every floorExport route widths, route labels, spare capacity, result status, route-type colours and placed equipment over the floor plans.
05One Excel file for the whole projectExport route-sizing results, the spare-capacity sheet, estimated materials list, issues and the source file name, sheet and row for each imported circuit.
06Three cable-spacing methodsChoose the width of each cable fixing, touching cable diameters, or a clear gap equal to twice the cable diameter. The first two methods can use one or two layers. The wider-spacing method cannot be stacked and should be used only when the required spacing will be maintained.
07Cable weight and support assessmentAdd the weights of cables, separate protective earth conductors and the tray or ladder for each route section. Where manufacturer safe-working-load data is available, FillSizer finds the widest support spacing at which the calculated weight stays within the load rating. Optional checks cover hanging rods and support crossbars, and clearly state when a check could not be completed.
08Routing for standby and life-safety circuitsReview circuits supplied by a generator, uninterruptible power supply or automatic transfer switch. After you confirm life-safety status, automatic routing uses only the route types allowed for those circuits and flags possible mixing of life-safety and other circuits.
09Update a revised cable schedule safelyRe-import with saved column mappings, decide how duplicates are handled and undo an import batch. Existing results are marked for recalculation, and the next run shows what changed.
10Familiar tools that work offlineIf you already use Excel and PDF markup, that workflow is familiar, works offline and remains practical for small, one-off jobs.

Both workflows can produce Excel and PDF files. FillSizer keeps the schedule, routes and calculations linked from import to export.

Automatic routing works only for supported circuits and uses the tray or ladder network already drawn. All engineering checks are advisory checks, not compliance verification. Route lengths are estimates based on the PDF scale.

Pricing

Choose a plan after your 30-day trial.

Full features for 30 days on one concurrent project. No card required.

ONE PROJECTAFTER TRIAL

Project Pass

£179single payment

90 days, one project

  • All features for one user
  • Assign it to a project or job number
  • £99 per extra 90 days
  • No recurring subscription
REGULAR USEAFTER TRIAL

Solo

£79per month

or £749 per year

  • One user, five active projects
  • Unlimited schedule imports
  • Cable, tray and ladder libraries
  • Excel exports and email support
PLANNED FOR TEAMS

Teams

For consultancies needing multiple users

One licence for each named user · Planned after launch · Email us to register interest
Contact us

Need more users or a specific setup? Email [email protected].

Common questions

Questions before you start

01Do I need Revit or a building information model?

No. Upload a floor-plan PDF, set its scale with a known distance and draw the routes over it.

02What can I import?

Excel workbooks and comma-separated text files, including ElectricalOM cable-schedule reports. Match the columns during import; each circuit keeps its source file, sheet and row.

03Does FillSizer verify compliance?

No. FillSizer flags spare capacity, life-safety segregation and cable-weight checks for engineering review. These are advisory checks, not compliance verification.

04What does it size today?

FillSizer currently sizes steel-wire-armoured submain cables with cross-linked polyethylene insulation and conductor sizes from 25 to 400 square millimetres, on cable tray and ladder. Sizing for cable basket, trunking and final-circuit cables is on the roadmap.

05How do I check the numbers?

Open a sized route section to see each cable contribution, the spare-capacity target, selected tray or ladder size and available weight check.

06Is my project data confidential?

Projects are private to your account. You can export your data or request deletion from account settings. See the Privacy Policy for retention periods and the service providers that process data.

07What do I need to run it?

A modern web browser. There is nothing to install.

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Import a schedule, draw routes, calculate and export. No card required.

All sizing features One concurrent project No card required
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