Crane Outrigger Timber Mat Bearing Sizer — Excel Calculator & Field Toolkit

27-sheet workbook for preliminary ground-pressure calculations, conditional timber checks, mat comparisons, and field verification records.

Organize verified outrigger reactions, evaluate effective ground contact, and document timber-mat screening in one practical toolkit. Includes a 27-sheet Excel workbook, 25 candidate comparison rows, 18 sensitivity scenarios, fillable PDF and editable Word field forms, and a 15-page engineering guide.

Organize crane ground-support screening from calculation to field record

Bring crane reactions, timber-mat calculations, ground information, and installation records into one structured workflow.

The Crane Outrigger Timber Mat Bearing Sizer helps qualified engineering and lifting teams prepare preliminary support assessments for stationary mobile cranes on outriggers. Document source-supported inputs, perform applicable numerical checks, compare proposed configurations, and identify unresolved engineering or field requirements.

Keep essential checks separate

The workbook distinguishes between:

• Maximum outrigger reaction.

• Float-to-timber contact pressure.

• Timber bending, shear, and local bearing.

• Elastic member deflection.

• Effective mat-to-ground contact.

• Average modeled ground-bearing pressure.

• Settlement, underground hazards, and field conditions.

A favorable result in one check does not automatically complete the others.

Record verified reaction data

Maintain a reaction register with crane, configuration, setup, load-case, and outrigger identifiers. Matching controls flag inconsistent selections and missing verification evidence.

Enter maximum reactions from appropriate manufacturer data or substantiated engineering analysis. The workbook does not estimate maximum reaction by dividing total crane load equally among the supports.

Perform applicable timber and ground calculations

Calculate float areas, mat geometry, self-weight, effective contact area, and average modeled ground pressure. Compare ground demand with a compatible, project-specific gross average allowable criterion.

For justified rectangular-member models, screen local compression perpendicular to grain, bending, shear, and elastic deflection. The structural workflow includes a conditional simple-span center-load model, externally reviewed actions, and a separate documented manufacturer-rating comparison.

Compare candidate configurations

Use 25 candidate rows to compare mat geometry and ground-pressure results. Candidate-specific structural ratios require supporting external calculations.

Explore 18 sensitivity scenarios involving reaction, footprint, contact fraction, thickness-related weight, ground criteria, and float area. Changes in grade, moisture, or arrangement require renewed material and model review.

Connect calculations with site documentation

Record mat condition, assembly details, ground preparation, settlement reviews, underground hazards, and installation inspections.

Use the executive dashboard, QA controls, calculation trace, and printable screening report to communicate the selected case and outstanding holds.

What you receive

• 27-sheet Excel workbook with interconnected formulas.

• Four-page fillable PDF field form containing 60 text fields.

• Four-page editable Word field form.

• 15-page Engineering SOP & Setup Guide.

• README covering workflow, compatibility, and license.

• Validation record documenting 38 performed calculation and control tests.

All six files are supplied together in one ZIP package.

Intended users

Civil and structural engineers, temporary-works professionals, lift directors, crane setup supervisors, geotechnical reviewers, and construction teams working with appropriate technical oversight.

Important scope and compatibility information

This is a preliminary screening and documentation toolkit. It does not approve a mat design, certify ground conditions, or authorize crane operation.

Users must supply verified reactions, material properties, applicable NDS factors, ground criteria, and supporting engineering evidence. NDS factor selection, settlement, soil–structure interaction, connection design, buried-structure capacity, and overall crane stability are not automatically calculated.

Desktop Microsoft Excel is the intended workbook environment. Native desktop Excel interaction has not been tested; the included validation record explains the checks performed.

Digital files only. No physical product, engineering review service, professional seal, or certification is included.

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