No more spreadsheets! We combine sensible defaults with your inputs, to present complex technical calculations in a simple graphical way.
Calculate after-frame, front and rear overhang, overall length, width and height dimensions, cab to body clearance, frontal area and many more. Relevant dimensions are checked against state regulations and user-defined limits. Issues are flagged by color-coded indicators. Know what will fit before you proceed with the build.
The amount of payload that can be legally carried on your truck is influenced by the chassis spec, body weight and position, as well as the placement of all of the ancillary equipment on the vehicle. Experiment with dimensions and placement of components to realize the full payload potential of the truck, while complying with axle weight limits, overall length, etc.
Overall vertical center of gravity is auto-calculated by combining the weight and center of gravity of the truck, the body, and each additional item of equipment. Calculating the overall vertical center of gravity of a truck is vital to assessing its stability. The program also calculates the Static Rollover Angle, that is, the angle to which the truck could be tilted before the center of gravity is brought directly over the roll point.
Turning Radius, or Turning Circle, is a measurement of the smallest circle in which the truck can make a 360° turn. The wall-to-wall turning radius includes the space required for the vehicle front overhang, while the curb-to-curb turning radius assumes that the vehicle can overhang the curb to turn in a smaller circle. The Turning Ability of the chassis may be specified using Inner Steering Angle, Curb to Curb Radius or Wall to Wall Radius.
Wide Range of Combinations
From Class 1 right up to Class 8 trucks, with infinite possibilities for bodies and equipment, and pulling up to 2 trailers behind.
Choose to do a weight study for a chassis cab, or ‘straight truck’ – single or twin steer -, semi truck, box delete, pickup truck or van. The program supports trucks with up to 6 axles – 2 on the front and 4 on the rear, with available axle layouts including 4×2, 4×4, 6×2, 6×4, 6×6, 8×2, 8×4, 8×6, 10×4 and 12×4. Both US-style ‘conventional cab’ and European-style ‘cab-over’ trucks are supported.
As with bodies, the program supports any and all types of equipment or accessory. Pre-defined categories include cranes, refrigeration units, lift gates, 5th wheels or gooseballs, pintle hooks or couplers, hooklifts, bullbars, aerokits, snowplows, aerial platforms, fairings, toolboxes, outriggers and rear bumpers. There is a catch-all ‘Other’ category into which you can import any equipment of your choice.
When a body has been added to the truck or trailer, the maximum water-level (or evenly-distributed) load that can be legally carried is automatically calculated. This can be overridden with a user-defined load. Alternatively, multiple separate payload items may be positioned on the load deck. All technical information is re-calculated on the fly, as the load’s position, weight, volume or center of gravity changes.
Adding axles increases the load-carrying capacity of a truck. You can add pusher or tag axles to your truck, and define them as being liftable or not. Override the weight, Gross Axle Weight Rating (GAWR) and the Bridge or regulation limit for the lift axle. Axle weights can be calculated based on the lift axle being in the raised or dropped position. The number of tires on the axle and tire width are taken into account when calculating the footprint of the tires, and this in turn is used to determine regulation limits against which the design will be verified.
Add up to 2 trailers, with up to 4 axles on each. Choose from Semi-trailer, Full Turntable Drawbar trailer, Center-Axle Drawbar trailer, and Interlink or A-B trailer combinations. Axle weights are calculated for all axles or axle groups, as well as for the pintle hook or coupler, where applicable. 5th Wheel offset and Kingpin Setback are all configurable, and all technical information is re-calculated with each change.
Library of Product Specs
Save time searching for weights and dimensions, and use realistic graphics to bring your proposals to the next level.
TruckScience is backed by a library of product specs, which include general arrangement drawings, weights, dimensions, center of gravity and ratings. Specs for trucks, bodies, equipment and payload are added to the library on request. OEMs may choose to distribute product information to all users, or to only approved dealers and distributors.
Generic templates are provided for all common bodies, equipment and payload items, which can be used to experiment with theoretical dimensions, weights and center of gravity positions. These are useful if you have not yet settled on a particular product, but wish to determine the spec of a potential product for your configuration. These may also be used as substitutes when a product spec is not yet available in the product library.
Knowing that your configuration is safe, legal and efficient is not just about compliance. It’s about peace of mind.
Federal & State laws define maximum weights that a truck may carry, depending on number of axles, axle spacing, the tire footprint of those axles, etc. In addition, there are limits to vehicle length, rear overhang, etc. Limits vary significantly from one jurisdiction to another. As you work, your configuration is being checked for compliance with the laws in your chosen states, and any issues are flagged.
Chassis manufacturers define Gross Vehicle Weight Ratings (GVWR), Gross Axle Weight Ratings (GAWR), and Gross Combination Weight Ratings (GCWR) for their trucks. These are the maximum allowable weights for the vehicle and its axles, as stipulated by the OEM. As you are adding or making changes to components, your configuration is automatically checked against these ratings.
You can define your organization’s internal standards for weight distribution, dimensions and vehicle stability. For example, the minimum percentage of gross weight that must be carried on the front axles, the maximum rear overhang as a percentage of wheelbase, or the maximum height of the truck’s overall CG. These compliance checks are in addition to the checks against manufacturer ratings and state regulations.
Graphical PDF Reports
They say that a picture paints a thousand words.
We say a picture catches misunderstandings early in the process, and helps get the sale.
Great things happen when clever people work together to come up with the best solution.
Body and equipment manufacturers can make product specs available to approved distributors through a ‘Distributor Library’. Product specs are added to the library by uploading drawings in DXF format, and providing weights and dimensions for these products. Manufacturers control their own Distributor Library, including what is added to it, and who has access to the information.
Our design team are driven by the desire to give you an interface that is simple, intuitive and consistent.
To move bodies, equipment or payload around on the truck, simply drag & drop the components. As things are repositioned, all technical information is re-calculated, compliance is re-checked and maximum payload is re-calculated in real-time. Drag items around, to examine the point at which an axle becomes overloaded, or to watch the maximum payload rise or fall.
The default view is simple and uncluttered. You can however examine detailed views of weight distribution for the truck, fuel and crew, or the trailer. You can review center of gravity points for individual components, and see overall center of gravity. You can examine detailed weight information for Bridge groups, or see a bird’s-eye view of the turning radius of your configuration. You can also switch between side and top views, to help with lateral positioning of equipment and payload.