When a logistics or foreman is faced with the question of choosing dump trucks for large-scale excavation, quarrying or transportation of bulk cargo, one of the key metrics becomes body-size. In the context of the legendary Czech truck Tatra 815 This parameter is not a fixed value, depending solely on the manufacturer's passport data. In contrast, the actual capacity varies widely depending on the type of superstructure, the presence or absence of visors, and the physical condition of the platform itself.
Many people mistakenly believe that it is enough to know the model of the car to calculate the number of flights for removal of soil. However, Tatra 815 This is a designer who was assembled for the specific needs of the customer. The volume can vary from 6 cubic meters for highly specialized modifications to 25 or more cubic meters in the case of installing enlarged bodies of "buckets" with high sides. Understanding these differences is critical to accurate budgeting and timelines.
In this article, we will analyze in detail what the cubature depends on, how the structural features of the frame and suspension affect it, and also consider the real indicators for various modifications, including the popular versions of 6x6 and 8x8. You will learn why passport details may differ from the actual download and what to look for when buying or renting this equipment.
Factors affecting the cubic capacity of the platform
The first thing to consider when calculating the capacity is the geometry of the body itself. Standard rectangular shape provides predictable volumes, however, to work with light, but bulky loads (for example, snow, coal, sawdust) often used body with increased height of the sides. Geometric volume In such cases, it can be significantly increased by installing additional sections or visors, which allows you to carry more cargo per flight without violating the restrictions on the total weight of the car.
The second important aspect is the angle of inclination of the sides and the shape of the bottom. U Tatra 815 Often there are bodies with inclined sides that facilitate the unloading of sticky loads, such as clay or wet sand. However, this shape can visually reduce usable space compared to vertical sides of similar external length. In addition, the presence of lifting cylinders and their location also eat up part of the internal space of the platform.
⚠️ Note: When ordering equipment for the transportation of light bulk cargo (snow, chips), focus on the maximum volume with visors. For heavy loads (ore, soil) is critical not cubic, and the capacity, and here a large volume of the body can become disadvantage, as you can not fill it to the brim without overloading the axles.
The third factor is the fabrication material. Steel bodies are thicker and have a smaller internal volume at the same external dimensions than aluminum counterparts that are found on more modern or specialized versions. Tatra. The difference in wall thickness can be several centimeters around the perimeter, which in terms of the total volume gives a noticeable increase in cubic meters.
Standard modifications and their capacity
Considering the model range Tatra 815There are several main groups by the size of the platform. Basic construction versions, which are most often found in the secondary market and in utility parks, are usually equipped with bodies ranging from 6 to 10 cubic meters. These are “workhorses” designed for intensive operation in construction sites, where maneuverability and reliability are important, rather than record capacity.
For quarry works and trunk transportation, modifications with an increased base and a reinforced frame are used. Here, the standard volume is considered to be in the range of 12-16 cubic meters. Such machines often have a three-way unloading, which increases their versatility. It is important to note that load-carrying capacity Such machines allow to use effectively all available volume even for medium-density cargoes.
Specialized versions, such as snow blowers or machines for the transportation of process liquids, where the concept of body volume is transformed into a tank volume or dump. However, in the classical sense of the dump truck, the most running are the average values that allow you to remain within the road limits on axial loads.
- 🚜 Construction versions: 6–9 m3, often with rear unloading, are designed for brick, concrete, combat.
- 🏗️ Career modifications: 12-16 m3, reinforced suspension, often 8x8, for soil, crushed stone, ore.
- ❄️ Utilities: 8-10 m3, often with visors to increase the volume when exporting snow.
Influence of 6x6 and 8x8 design on body parameters
The configuration of the wheel formula directly dictates the size and type of body to be installed. Formula machines 6x6 They are usually shorter than their eight-wheeled counterparts. It is physically more difficult to place a platform with a volume of more than 12-14 cubic meters without serious overhang removal, which negatively affects handling. Therefore, 6x6 is characterized by more compact, but high-strength bodies.
Eight-wheeled versions Tatra 815 8x8 They have enormous potential to install large-sized superstructures. The length of the frame allows you to mount the body up to 18-20 cubic meters and even more. The law of physics comes into force: the center of gravity. With a full volume of high body and loading with heavy soil, there is a risk of tipping over, so correct weighting is critically important for such machines.
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The type of suspension should also be considered. Famous tatrove Independent suspension with swinging semi-axles ("swinging bridges") provides excellent cross-country performance, but imposes restrictions on the height of the center of gravity of the cargo. Unlike cars with springs, where the body can be made wider and lower, the Tatras With its high landing of bridges, the body often has to be done already or compensate for the height by volume due to the length.
Calculation of real volume: geometric and with visors
To accurately understand how much cargo will enter the body, it is necessary to distinguish between the geometric volume and the volume with the visors. Geometric volume is the product of the internal length, width and height of the sides. This is a “pure” number that is often listed in basic specifications. However, in real operation, especially in winter or when working with light materials, this volume is categorically lacking.
Installation of visors (overheads) is the most common way to increase capacity. They can be steel, aluminum or even made of tarpaulin on the frame (for specific cargoes). Adding visors 50–80 cm high can increase body volume Tatra 815 30-40%, which for a machine with a base of 10 m3 means a transition to the category of 13-14 m3.
| Body type | Basic volume (m3) | Volume with visors (m3) | Exemplary appointment |
|---|---|---|---|
| Standard building | 6.0 – 7.0 | 8.0 – 9.0 | Brick, concrete, garbage |
| Enhanced career | 10.0 – 12.0 | 14.0 – 15.0 | Soil, sand, rubble |
| Increased (agriculture/coal) | 14.0 – 16.0 | 18.0 – 22.0 | Coal, snow, grain |
| Special (bunker) | 8.0 – 10.0 | Not applicable. | Technological goods |
If you load 20 cubes of snow into a body designed to hold 10 tons of load capacity, you risk damaging the frame or bridges, even if the volume allows.
Comparison with competitors: KAMAZ and other brands
In the post-Soviet space, the main competitor Tatras traditionally kamaz. If we compare the volume of bodies, then KAMAZ often win in standard configurations due to a lower landing platform and the possibility of installing wide rectangular bodies. For example, the KAMAZ-65115 in standard configuration often has a volume of about 10 m3, while the similar Tatra class can offer 8-9 m3 in the base, but wins in cross-country performance.
However, in the face of the difficult circumstances, where Tatra 815 Feels like a fish in the water, competitors with a 6x6 wheel formula often give way to the possibility of installing ultra-large bodies due to the shorter frame length or suspension features. European analogues, such as MAN or Mercedes-Benz The Z series can offer comparable volumes, but their maintenance costs and adaptation to harsh winter conditions often lose out to the Czech giant.
Why does Tatra have less in the database?
The secret lies in the design of the central tubular frame and independent suspension. This design requires higher axles and specific body mounting, which often dictates its sizes different from the classic sparser frames of competitors.
When choosing between brands, it is worth considering not only the “dry figures” of the volume, but also the load capacity utilization factor. Tatras often allow you to load more weight into the same volume due to the robust construction, which ultimately makes a smaller geometric volume more efficient for heavy loads.
Operational nuances and body maintenance
The volume of the body is not a static parameter. Over time, during active operation, the geometry of the platform can change. Strikes by large fractions of the rock, the work of hydraulics under load and corrosion processes lead to deformations. Metal "gets tired", the sides can disperse or, conversely, get dents, which will change the real volume. Regular inspection of the condition of welded seams and anchorages of the sides is mandatory.
Particular attention should be paid to the rear-board locking mechanism. If the side does not fit tightly due to the deformation of seals or geometry, some of the fine cargo (sand, earth) will pour out along the way, which actually reduces the delivered volume. For Tatra 815 The reliability of these nodes is characteristic, but maintenance is also required for them.
To prevent freezing of cargo in winter and preserve the payload, treat the inner sides of the body with special anti-adhesion compounds or waste oil before loading. It will also speed up the unloading.
It is also worth considering the wear of the hydraulic cylinder. If the cylinder rod has a backlash or “tramps”, the operator may not lift the body to full height due to the risk of jamming, which indirectly affects the efficiency of using the volume during unloading, although it does not change the capacity itself.
⚠️ Warning: Never exceed the lifting angle specified in the instructions when attempting to unload the rest of the cargo from the full volume. This can lead to the car rolling over, especially on soft ground or when rolling.
How to choose the optimal volume for your tasks
Choice of body volume Tatra 815 It should be based on a thorough analysis of the tasks. If you plan to carry sand for construction, where weight is important, not fluffiness, you will have enough standard 8-10 cubes. If the main activity is the removal of snow or light debris, then the search for a car with visors and a volume of 14 cubic meters will be the number one priority.
Don't forget the logistics. High volume means less frequent flights, but requires better access roads. Tatra 815 It is famous for its cross-country ability, but a 20-cubic body filled to the end turns the car into an inertial projectile, with which it is difficult to maneuver in narrow urban conditions or on steep slopes of the quarry.
The optimal choice is the balance between the load capacity of the chassis and the volume of the body. Don’t chase for maximum cubes if your chassis doesn’t pull that weight, or for more weight if you have nowhere to put it physically.
In the end, the correct assessment of the required volume will save significant money on fuel and equipment resource. An overloaded car or a car rolling half empty for the sake of volume is a loss. Tatra 815 It gives flexibility of choice, and the competent use of this flexibility is the key to successful business.
Frequently Asked Questions (FAQ)
What is the real volume of the body of the Tatra 815 in the 6x6 modification?
For the modification of 6x6, the volume of 6 to 10 cubic meters is considered standard, depending on the year of release and the type of superstructure. With the installed visors, the volume can reach 12-13 m3.
Can I increase the volume of the Tatra body by myself?
Technically it is possible to increase the sides or install visors, but this requires welding and re-registration of changes in the design of the vehicle in the traffic police, as the passport capacity and dimensions change.
What is the difference between the volume of the Tatra and KamAZ body?
KAMAZs often have more standard rectangular bodies of larger volume (10-12 m3 in the base) due to a lower landing. Tatras are often equipped with bodies of 6-9 m3, but they win in cross-country and the ability to work in extreme conditions.
How does the presence of visors affect the load capacity?
The visors increase the volume, but do not increase the load capacity of the chassis. Loading the increased volume with a heavy load (for example, wet soil) will lead to overloading of the axles and possible breakage of the frame or suspension.
What is the best amount of snow for the Tatra 815?
For snow that is lightweight, the maximum volume with high visors (14-18 m3) is optimal to minimize the number of flights, since the weight limit will not be reached.