Mobile Detailing Rig-Load Worksheet

Use this worksheet to inventory the load, compare realistic fluid scenarios, and record vehicle and axle measurements. It is a planning and recordkeeping aid, not a vehicle approval, tank-installation design, or permission to drive.

Version 1.0 | Prepared October 18, 2026 | Rinse educational resource.

Before you start

Ford's 2024 Transit manual defines payload as occupants plus cargo, explains that added equipment reduces the remaining allowance, and includes trailer tongue or king-pin weight in vehicle payload. Use the labels and manual for your exact vehicle rather than borrowing another rig's advertised payload. (Ford Transit manual, printed pp. 310–313)

Gross vehicle weight rating (GVWR) and each gross axle weight rating (GAWR) are separate limits; Ford warns not to exceed either. A satisfactory combined weight does not establish satisfactory axle loading. (Ford Transit manual, printed pp. 310–313)

Use one unit system throughout each copy of the worksheet. The worked example uses pounds and U.S.-volume water estimates; its fictional numbers must not be copied into a real vehicle assessment.

Vehicle and document record

Complete one worksheet per configuration and keep the underlying label photographs, manuals, inventory, and measurement records together. Recheck the worksheet when equipment, staffing, tanks, or towing arrangements change.

If a label is missing, unreadable, or inconsistent with an upfit, record the issue and obtain authoritative clarification. Do not invent a usable allowance by subtracting an internet curb weight from an advertised maximum.

Choose a counting method

Use the inventory method to estimate added load and the measurement record to check the loaded configuration. Keep the two methods distinct so equipment and fuel are not counted twice.

Inventory method

Begin with the actual applicable occupants-plus-cargo allowance and list everything that must count against it. Ford explains that its factory payload figure must be reduced for equipment installed afterward. (Ford Transit manual, printed p. 312)

Do not add a factory-installed component a second time if it is already accounted for in the applicable vehicle documentation. If you cannot establish the baseline treatment of a component or fuel, leave the issue unresolved rather than assuming zero.

Inventory remainder = applicable occupants-plus-cargo allowance minus the total counted load. A positive result is remaining arithmetic allowance, not a safety margin or clearance to operate.

Measured loaded configuration

Record what was actually aboard when the rig was measured. Do not add an inventory item to a scale total that already includes it.

For a trailer combination, obtain an appropriate separate assessment of actual coupling load, trailer and combination weights, ratings, braking, and towing requirements. This worksheet does not replace that assessment.

Arrange a safe measurement plan with a qualified provider. Do not drive a suspected overloaded or improperly secured rig to a scale simply to complete the form.

Compare real fluid scenarios

USGS uses approximately 8.34 pounds per gallon for water; use that only as an approximation for ordinary water, not an assumed density for every recovered liquid or chemical. Record actual density or a defensible estimate where the contents differ. (USGS water-weight explanation)

For each tank, contents weight = volume multiplied by the appropriate weight-per-volume value. Count the empty tank and mounting hardware separately unless already included elsewhere.

Do not assume the fresh tank is empty whenever the recovery tank is full. Conversely, do not treat both full capacities as an observed condition if the rig cannot reach it; document the maximum combination that is actually possible and the operating restriction used to prevent another combination.

Worked example: total weight passes, rear axle does not

All vehicle ratings, equipment weights, and scale readings below are invented for instruction. Only the approximate water conversion is externally sourced; this is not a real Transit configuration or a recommendation for a 100-gallon tank.

Inventory

Assume a fictional vehicle has an applicable 3,000 lb occupants-plus-cargo allowance, a 9,000 lb GVWR, a 3,900 lb front GAWR, and a 5,360 lb rear GAWR. Its documented fictional baseline is 6,000 lb, and the additional 700 lb below includes the empty tank and mounts.

The 834 lb water estimate uses the USGS approximation. Real water weight and the precision of a real measurement depend on the actual contents and measurement method. (USGS conversion)

Axle check

Suppose a fictional measurement of that configuration reports 2,934 lb at the front and 5,500 lb at the rear. The axle sum is 8,434 lb, matching the assumed gross.

The rear axle is 140 lb over its fictional rating even though the vehicle total is 566 lb below GVWR. Record a hold and obtain a qualified corrective plan; do not label the rig safe, assume moving a known weight between axles solves it, or drive it to obtain a second reading.

This illustrates the independent axle check required by the manufacturer's loading instructions, not a calculated load-distribution model. Any changed configuration needs its own appropriate review and verification. (Ford Transit manual, printed pp. 310–313)

Fluid top-up check

Keeping the example's other load at 1,600 lb, suppose both fresh and recovered contents can be approximated as water for this arithmetic exercise. The table does not establish the density of real recovered wash water.

The refill consumes 500.4 lb of the departure scenario's arithmetic remainder; another 100 lb of supplies would exceed the fictional allowance by 34.4 lb. None of these inventory scenarios clears the unresolved rear-axle problem, and none establishes tank securement or handling suitability.

Review and action record

Use this proposed status system to track unresolved work. “Recorded” means the evidence exists, not that Rinse or the person completing this form certifies the rig.

• Identity: Applicable labels, manual, configuration and units are recorded.
• Completeness: All added equipment, occupants, supplies, fluids and applicable coupling load are counted once.
• Fluid scenarios: Maximum plausible contents and top-up practices are documented.
• Weights: Gross and each axle are reviewed against the applicable ratings.
• Installation: Tank securement, load distribution and any upfit issues are routed to qualified review.
• Towing: Any trailer setup has its separate assessment.
• Uncertainty: Missing weights, inconsistent records and excess loads remain visible.
• Change control: The worksheet is updated after material changes.

Scope and publication note

This worksheet is U.S.-oriented and has not been field-tested or approved by a vehicle engineer. The cited Ford manual is a specific model-year example, so obtain the actual rig's documents and competent review before relying on a completed copy.

Keep filled worksheets, label photos, and vehicle-identifying records private. The public resource should be the blank form and clearly fictional example, not a customer's or operator's completed assessment.