Check transport loading and working support separately
The chassis carries the equipment on the road; the deployed support system handles working reactions at the site. Passing one condition does not establish the other. Use completed gross and axle mass for transport, with the actual stowed installation.
Working support needs the approved reactions for the boom, platform load and setup. Dividing total machine weight by four does not produce a valid outrigger reaction. Pad area alone also cannot resolve soil variability, voids or slope.
Reserve the whole working footprint
A truck that fits through a narrow street may lack space to deploy and work. Include outriggers, tail swing, platform movement and traffic exclusion. Support pads or a solid surface remain part of the required assessment, alongside the manufacturer and local conditions.
Scroll horizontally to view all columns.
| Decision | What to establish | Condition or limit |
|---|---|---|
| Transport mass | Calculate completed gross and axle loads in stowed condition. | Bare chassis payload is not installed-equipment capacity. |
| Support reactions | Use the defined boom, load and setup reaction case. | Machine mass divided by four is not a valid outrigger reaction. |
| Ground support | Compare approved pad and ground capacity with qualified reactions. | Pad area alone does not address soil variability, voids or slope. |
| Site footprint | Reserve outrigger, tail-swing, platform and traffic exclusion space. | A stable setup that blocks unsafe traffic movement is not acceptable. |
Request transport and support evidence for the proposed installation
Send the site envelope and known ground constraints with the task positions. Ask qualified engineering and site personnel to establish the reaction and ground-support basis. Leave setup approval open for unverified ground, insufficient footprint or uncontrolled traffic.
Information to prepare for this review
- Selected boom and platform system mass
- Chassis wheelbase, gross and axle ratings
- Subframe and installation requirements
- Outrigger geometry and reactions
- Ground condition, slope and pad method
- Traffic lane, obstacle and exclusion-space limits
Records to request and keep
- Completed-vehicle mass and axle calculation
- Approved installation and subframe documentation
- Outrigger reaction and footprint data
- Ground and work-zone setup assessment
Common mistakes and what to check instead
- Choosing the smallest chassis for access: Check installation, mass, axle, support and road requirements first.
- Estimating equal outrigger loads: Use the relevant manufacturer or qualified reaction data.
- Ignoring traffic occupation: Draw the full setup and exclusion envelope on the site plan.
Scope of this guide
This page does not design a subframe, pad or ground-support system.
Qualified engineering, manufacturer requirements and site assessment control setup.
Do not set up on unverified ground, excessive slope, inadequate footprint, uncontrolled traffic or unresolved support reactions.
Sources and applicability
Controls the project-input, quotation, approval and inspection workflow described in this guide.
Provides public checklists and worksheets; the signed project documents remain controlling.
Defines the relevant product family and published configuration boundaries. Project-specific ratings require the selected OEM documents.
Official U.S. reference supporting manufacturer load limits, controls, outriggers, brakes and travel checks. It is not a destination approval or KEEYAK rating.
Official U.S. guidance for worksite assessment, training, inspection, platform load, reach and stabilization. Local rules may differ.