Данные китайской таможни показывают, что в 2021 году, Замбия imported electric hoists from China worth US$94,000 and non-electric hoists worth US$102,000. Compared to 2020, the figures are $174,000 and $240,000. From the data point of view, Zambia’s demand for Chinese electric hoists is decreasing. At the same time, the bilateral import and export volume of goods between China and Zambia in 2021 will be US$5,155.83 million, an increase of US$1,168.2836 million compared with the same period in 2020, a year-on-year increase of 23.1% . For Chinese crane suppliers, the shrinking Zambian crane market has little impact, but more efforts are needed to further develop Zambia's crane market.
Группа кранов Дунци is an excellent crane supplier in China. It has many years of crane service experience in Zambia and can independently provide various types of crane equipment for Zambian customers. Electric hoist is one of Dongqi's important crane products. To help Zambian customers better understand our products, this article will introduce the working characteristics and technical parameters of different types of electric hoists one by one. If you are interested in our products, you can click here to Связаться с нами, или сообщите нам по Электронная почта: sales010@cranesdq.com
Types of electric hoists sold by Dongqi Hoist to Zambia
MD1 Double Speed Electric Hoist for Zambia
Двухскоростная электрическая лебедка - это малогабаритное подъемное оборудование, которое устанавливается на однобалочные мостовые краны, козловые краны, стреловые краны для погрузочно-разгрузочных работ. В качестве одного из наиболее часто используемых погрузочно-разгрузочных оборудования, электрическая лебедка с двойной скоростью обычно используется на заводе, в горнодобывающей промышленности, на железной дороге, в порту, на складах и т.д.
As an upgraded version of CD1 single-speed electric hoist, MD1 two-speed electric hoist has more advantages in lifting operations, including two-speed control, smooth and accurate lifting, and wide application range. The following is an analysis of the application of MD1 two-speed electric hoist in Zambia, combined with its working characteristics:
Рабочие характеристики двухскоростной электрической лебедки MD1
Two-speed control:
MD1 two-speed electric hoist has two lifting speeds: normal speed (8m/min) and slow speed (0.8m/min), which makes it perform well in occasions where precise control of the lifting position is required.
Smooth and accurate lifting:
Due to the two-speed control and advanced manufacturing technology, MD1 two-speed electric hoist can remain stable during the lifting process, reduce the shaking of goods, and ensure the accuracy of lifting.
Wide application range:
MD1 two-speed electric hoist is suitable for working environments of -20℃~+40℃, can be installed on straight or curved I-beams, and can also be used on bridge cranes, gantry cranes or cantilever cranes to meet the lifting needs in a variety of industrial environments.
Высокая степень интеллекта:
MD1 two-speed electric hoist can be equipped with a wireless remote control to achieve remote operation, improve the convenience and safety of operation.
High-performance motor and reducer:
The motor adopts a three-phase asynchronous motor, adopts Class B or Class F insulation, and the protection level is generally IP44/IP54. The reducer adopts a hard tooth surface transmission design, with long life and high mechanical efficiency.
Application analysis in Zambia
Обрабатывающая промышленность:
Zambia's manufacturing industry is gradually developing, and the MD1 two-speed electric hoist can be used for heavy machinery and equipment hoisting and production line material handling operations within the factory. Its two-speed control and stable and accurate hoisting characteristics enable it to meet the manufacturing industry's needs for efficient and precise operations.
Строительство инфраструктуры:
In the field of infrastructure construction in Zambia, such as bridges, roads, buildings and other projects, the MD1 two-speed electric hoist can be used for the hoisting and handling of large components. Its wide range of applications enables it to play a role in a variety of complex construction environments.
Mining field:
Zambia has rich mineral resources, and the MD1 two-speed electric hoist can be used for heavy equipment hoisting, ore handling and other operations in mines. Its high-performance motor and reducer enable it to maintain efficient and stable operation in harsh mining environments.
Складирование и логистика:
In the field of warehousing and logistics in Zambia, the MD1 two-speed electric hoist can be used for stacking, handling and loading and unloading of heavy goods. Its high degree of intelligence and convenient operation enable it to improve the efficiency and accuracy of warehousing and logistics.
Другие области:
The MD1 two-speed electric hoist can also be used in precision machining industries, machine tool maintenance and other fine working occasions. Its ability to accurately control the lifting position enables it to meet the needs of these fields for high-precision operations.
Меры предосторожности
Адаптивность к окружающей среде:
When using the MD1 two-speed electric hoist in Zambia, its environmental adaptability needs to be considered. In particular, differences in climatic conditions may affect the operation of the equipment, so it is necessary to select equipment with strong adaptability and good durability.
Technical training:
In order to ensure the correct use and maintenance of the MD1 two-speed electric hoist in Zambia, technical training is required for operators. The training content should include knowledge of the crane's operating procedures, safety precautions, and daily maintenance and care.
Послепродажное обслуживание:
When using the MD1 two-speed electric hoist in Zambia, you need to pay attention to the quality and timeliness of after-sales service. This includes regular maintenance of the equipment, fault repairs, and spare parts supply, to ensure that problems with the crane can be solved promptly and effectively.
CD1 Single Speed Electric Wire Rope Hoist for Zambia
Электрическая канатная таль - это тип погрузочно-разгрузочного оборудования, устанавливаемого на однобалочный кран, линейные криволинейные стренговые балки или может использоваться в подъемном механизме двухбалочного крана, козлового крана, линейного крана для погрузочно-разгрузочных работ промышленными и горнодобывающими предприятиями, железными дорогами, складами и т.д. Грузоподъемность односкоростной электрический канатный подъемник весит от 0,5 до 32 тонн, а рабочий класс - М3 и М4.
CD1 single-speed wire rope electric hoist is a widely used light lifting equipment with many advantages such as compact structure, light weight, safety and reliability, and easy operation. The following is an analysis of the application of CD1 single-speed wire rope electric hoist in Zambia, combined with its working characteristics:
Рабочие характеристики односкоростной канатной электрической лебедки CD1
Компактная конструкция и малый вес:
CD1 electric hoist is small in size and light in weight, easy to install and move, and suitable for a variety of lifting occasions.
Плавная работа и простое управление:
Adopting single-speed control, smooth operation and simple operation, reducing the difficulty of operation and the risk of misoperation.
Strong bearing capacity:
CD1 electric hoist has a high bearing capacity and can meet the lifting needs of a variety of heavy materials.
Широкий спектр применения:
It can be used in a variety of environmental conditions, such as factories, warehouses, docks, power stations, etc., and is suitable for an operating temperature range of -20℃~+40℃.
Strong versatility of parts:
The parts of CD1 electric hoist are highly versatile, easy to repair and replace, and reduce maintenance costs.
Application Analysis in Zambia
Производство:
Zambia's manufacturing industry is developing rapidly, and CD1 electric hoists can be used for lifting heavy machinery and equipment inside the factory, material handling of production lines and other operations. Its compact structure and light weight enable it to operate flexibly in narrow factory spaces.
Строительство инфраструктуры:
In Zambia's infrastructure construction field, such as construction sites of bridges, roads, buildings and other projects, CD1 electric hoists can be used for lifting and handling heavy materials such as steel bars and prefabricated components. Its strong load-bearing capacity and smooth operation ensure safety and efficiency during the construction process.
Mining Field:
Zambia has rich mineral resources, and CD1 electric hoists can be used for heavy equipment lifting, ore handling and other operations in mines. In the mining environment, its compact structure and easy operation enable it to maintain efficient operation under harsh conditions.
Складирование и логистика:
In Zambia's warehousing and logistics field, CD1 electric hoists can be used for stacking, handling and loading and unloading of heavy goods. Its strong versatility of parts and low maintenance costs make it an ideal choice in the warehousing and logistics industry.
Сельскохозяйственное поле:
In the agricultural field of Zambia, CD1 electric hoist can be used for lifting and handling of agricultural product processing and storage equipment. Its light and flexible characteristics enable it to play an important role in the agricultural environment.
Меры предосторожности
Адаптивность к окружающей среде: When using CD1 electric hoist in Zambia, its environmental adaptability needs to be considered. In particular, differences in climatic conditions may affect the operation of the equipment, so it is necessary to select equipment with strong adaptability and good durability.
Operational safety: Although CD1 electric hoist is simple to operate, it is still necessary to strictly abide by the operating procedures and safety precautions to ensure safety during operation.
Техническое обслуживание: Regularly maintain CD1 electric hoist, check the wear of its parts, and replace damaged parts in time to ensure long-term stable operation of the equipment.
Европейская канатная электрическая лебедка - это недавно разработанное погрузочно-разгрузочное оборудование с передовой технологией проектирования в соответствии со стандартами FEM и другими нормативными актами. Новая серия канатных электрических лебедок является экологически чистой, энергосберегающей и экономически эффективной, которая занимает первое место среди аналогичных продуктов. Грузоподъемность европейской канатной электрической лебедки составляет от 1 до 80 тонн, а рабочий класс - M5 и M6. Доступны индивидуальные европейские канатные электрические лебедки.
European electric hoists, as an electric lifting machinery using European technology and standards, have been widely used around the world for their compact structure, light weight, safety and reliability, excellent performance and easy maintenance. The following is an analysis of the application of European electric hoists in Zambia, combined with their working characteristics:
Рабочие характеристики европейских электрических подъемников
Компактная конструкция и малый вес: European electric hoists are exquisitely designed, small in size, light in weight, easy to install and move, and have low requirements for the supporting structure of the lifting equipment.
Безопасный и надежный: Using advanced manufacturing processes and materials, it has high strength, high durability and high safety, and can meet the lifting needs under various complex working conditions.
Отличная производительность: It has stable lifting performance and a wide range of lifting parameters, suitable for handling materials of different weights and sizes.
Простое техническое обслуживание: The structural design is reasonable, the parts are highly versatile, easy to repair and replace, and the maintenance cost is reduced.
Сильная адаптивность: Different types of European electric hoists, such as chain type or wire rope type, can be selected according to different working environments and needs to meet specific lifting needs.
Application Analysis in Zambia
Производство:
Zambia's manufacturing industry is developing rapidly, and European electric hoists can be used for heavy machinery and equipment lifting and production line material handling operations within the factory. Its compact structure and light weight enable it to operate flexibly in narrow factory spaces and improve production efficiency.
Строительство инфраструктуры:
In Zambia's infrastructure construction field, such as bridges, roads, buildings and other projects, European electric hoists can be used for lifting and handling heavy materials such as steel bars and prefabricated components. Its wide range of lifting parameters can meet the needs of material handling of different weights and sizes, ensuring the smooth progress of the construction process.
Mining Field:
Zambia has rich mineral resources, and European electric hoists can be used for heavy equipment lifting and ore handling operations in mines. Its safety, reliability and excellent performance enable it to maintain efficient operation in harsh mining environments and improve mining efficiency.
Складирование и логистика:
In Zambia's warehousing and logistics field, European electric hoists can be used for stacking, handling and loading and unloading of heavy goods. Its compact structure and easy operation enable it to operate efficiently in limited warehouse space, improving the efficiency and accuracy of warehousing logistics.
Сельскохозяйственное поле:
In the agricultural field of Zambia, European electric hoists can be used for lifting and handling of agricultural product processing equipment. Its strong adaptability and convenient maintenance enable it to play an important role in the agricultural environment and improve agricultural production efficiency.
Меры предосторожности
Адаптивность к окружающей среде:
When using European electric hoists in Zambia, its environmental adaptability needs to be considered. In particular, differences in climatic conditions may affect the operation of the equipment, so it is necessary to select equipment with strong adaptability and good durability.
Operational safety:
Strictly abide by the operating procedures and safety precautions to ensure safety during operation. Regularly conduct safety training for operators to improve their safety awareness and operating skills.
Техническое обслуживание:
Regularly maintain the Европейская электрическая лебедка, check the wear of its parts, and replace damaged parts in time to ensure the long-term stable operation of the equipment.
Электрическая цепная таль - это легкое и малогабаритное подъемное оборудование для погрузочно-разгрузочных работ. Электрическая цепная таль в основном состоит из двигателя, передаточного механизма и цепного колеса и т.д. Электрические цепные подъемники DQCRANES отличаются красивым внешним видом, прочной конструкцией, международными технологиями и т.д. Внутренние шестерни электрической цепной лебедки подвергаются горячей закалке, что повышает износостойкость шестерни и прочность. Грузоподъемность электрической цепной лебедки составляет от 0,5 до 35 тонн, а рабочий класс - М3 или М4.
As a material handling equipment widely used in various industrial occasions, the chain electric hoist has been favored by the majority of users for its safety, efficiency and practicality. The following is an analysis of the application of chain electric hoists in Zambia, combined with its working characteristics:
Working characteristics of chain electric hoists
Безопасный и надежный:
The chain electric hoist adopts advanced control technology and safety protection devices, such as overload protection and fire protection, to ensure the safety and reliability of the equipment during operation.
The brake is well designed and can quickly and accurately lock the chain when the equipment stops working to prevent heavy objects from accidentally falling.
Эффективный и энергосберегающий:
The chain electric hoist has an efficient transmission system and an optimized motor design, which enables the equipment to have lower energy consumption and higher work efficiency during operation.
Простота в эксплуатации:
The operation of the chain electric hoist is simple and convenient. Users only need to use the controller to realize the lifting and positioning of the equipment, which reduces the difficulty and labor intensity of operation.
It can be equipped with a wireless remote control to realize remote operation and improve the convenience of operation.
Сильная гибкость:
Цепная электрическая лебедка может быть легко установлена в различных случаях, например, в помещении, на открытом воздухе, стационарно или передвижно и т.д., обладая большой гибкостью.
It can be used with various auxiliary equipment, such as cantilever cranes, I-beams, etc., to meet the material handling needs of different occasions.
Низкие затраты на техническое обслуживание:
Конструкция цепной электрической лебедки проста и компактна, ее легко обслуживать, а также она снижает затраты на техническое обслуживание и эксплуатацию оборудования.
Application analysis in Zambia
Обрабатывающая промышленность:
Zambia's manufacturing industry is developing rapidly, and the chain electric hoist can be used for heavy machinery and equipment lifting and production line material handling operations within the factory. Its safe, reliable and easy-to-operate characteristics enable it to operate flexibly in a narrow factory space and improve production efficiency.
Строительство инфраструктуры:
In the field of infrastructure construction in Zambia, such as the construction sites of bridges, roads, buildings and other projects, the chain electric hoist can be used for the lifting and handling of heavy materials such as steel bars and prefabricated components. Its high efficiency, energy saving and strong flexibility enable it to maintain efficient operation in a complex construction environment and ensure the smooth progress of the construction process.
Mining field:
Zambia has rich mineral resources, and the chain electric hoist can be used for heavy equipment lifting, ore handling and other operations in mines. Its simple and compact structure and low maintenance cost enable it to maintain long-term stable operation in harsh mining environments and improve mining efficiency.
Складирование и логистика:
In the field of warehousing and logistics in Zambia, chain electric hoists can be used for stacking, handling and loading and unloading of heavy goods. Its easy operation and strong flexibility enable it to operate efficiently in limited warehouse space, improving the efficiency and accuracy of warehousing and logistics.
Сельскохозяйственное поле:
In the agricultural field in Zambia, chain electric hoists can be used for operations such as lifting and handling of agricultural product processing equipment. Its safety, reliability and low maintenance cost enable it to play an important role in the agricultural environment and improve agricultural production efficiency.
Меры предосторожности
Адаптивность к окружающей среде:
When using chain electric hoists in Zambia, its environmental adaptability needs to be considered. In particular, differences in climatic conditions may affect the operation of the equipment, so it is necessary to select equipment with strong adaptability and good durability.
Operational safety:
Strictly abide by the operating procedures and safety precautions to ensure safety during operation. Regularly conduct safety training for operators to improve their safety awareness and operating skills.
Техническое обслуживание:
Perform regular maintenance on the electric chain hoist, check the wear of its parts, and replace damaged parts in time to ensure the long-term stable operation of the equipment.
Электрическая лебедка с низким запасом хода преобразована в электрическую лебедку CD / MD. Продукт обладает характеристиками компактной конструкции, одинарного подъема, двойной скорости, высокоэффективного хода подъема и стабильной работы. Он имеет широкий диапазон применения, особенно в новых заводских зданиях. Высота подъема позволяет уменьшить высоту здания и снизить стоимость строительства.
Low headroom wire rope electric hoist has been widely used worldwide for its compact structure, high lifting height, stable operation and reliable performance. The following is an analysis of the application of low headroom wire rope electric hoist in Zambia, combined with its working characteristics:
Рабочие характеристики канатной электрической лебедки с низким запасом хода
Компактная конструкция: low headroom wire rope electric hoist is exquisitely designed and compact, which is easy to install and use in a limited space.
Высокая высота подъема: Compared with ordinary electric hoists, low headroom wire rope electric hoists have a higher lifting height, which can meet the needs of efficient use of lifting equipment in a lower space.
Плавная работа: It is manufactured with advanced transmission technology and high-quality materials to ensure that the equipment is stable and shake-free during operation, improving operating efficiency and safety.
Надежная работа: It has multiple safety functions such as overload protection and motor overheating protection to ensure that the equipment can still operate stably under harsh working conditions.
Простое техническое обслуживание: The structural design is reasonable, the parts are highly versatile, and it is easy to repair and replace, reducing maintenance costs.
Application Analysis in Zambia
Производство:
Zambia's manufacturing industry is developing rapidly, and low-headroom wire rope electric hoists can be used for heavy machinery and equipment lifting and production line material handling operations within the factory. Its compact structure allows it to operate flexibly in a narrow factory space and improve production efficiency.
At the same time, the high lifting height of the low-headroom wire rope electric hoist can make full use of the vertical space in the factory and reduce the building height and cost.
Строительство инфраструктуры:
In the field of infrastructure construction in Zambia, such as the construction sites of bridges, roads, buildings and other projects, low-headroom wire rope electric hoists can be used for the lifting and handling of heavy materials such as steel bars and prefabricated components. Its stable operation and reliable performance enable it to maintain efficient operation in a complex construction environment and ensure the smooth progress of the construction process.
Especially in temporary factories or low buildings, low-headroom wire rope electric hoists can play a greater role and meet construction needs.
Mining field:
Zambia has rich mineral resources, and low-headroom wire rope electric hoists can be used for heavy equipment lifting, ore handling and other operations in mines. Its compact structure and easy maintenance enable it to maintain long-term stable operation in harsh mining environments and improve mining efficiency.
At the same time, the high lifting height of the low-headroom wire rope electric hoist can make full use of the vertical space of the mine and reduce mining costs.
Складирование и логистика:
In the field of warehousing and logistics in Zambia, low-headroom wire rope electric hoists can be used for stacking, handling and loading and unloading of heavy goods. Its compact structure and easy operation enable it to operate efficiently in limited warehouse space, improving the efficiency and accuracy of warehousing and logistics.
At the same time, the various safety functions of low-headroom wire rope electric hoists can ensure safety during operation and reduce the risk of accidents.
Сельскохозяйственное поле:
In the agricultural field in Zambia, low-headroom wire rope electric hoists can be used for operations such as lifting and handling of agricultural product processing equipment. Its compact structure and easy maintenance enable it to play an important role in the agricultural environment and improve agricultural production efficiency.
At the same time, the high lifting height of the low-headroom wire rope electric hoist can make full use of the vertical space of agricultural facilities and reduce agricultural costs.
Меры предосторожности
Environmental adaptability: When using low-headroom wire rope electric hoists in Zambia, its environmental adaptability needs to be considered. In particular, differences in climatic conditions may affect the operation of the equipment, so it is necessary to select equipment with strong adaptability and good durability.
Operational safety: Strictly abide by operating procedures and safety precautions to ensure safety during operation. Regularly conduct safety training for operators to improve their safety awareness and operating skills.
Maintenance: Regularly maintain the low-headroom wire rope electric hoist, check the wear of its parts, and replace damaged parts in time to ensure the long-term stable operation of the equipment.
Ручная цепная лебедка / цепной блок - одно из самых экономичных погрузочно-разгрузочных устройств с особенностями ручного управления, простой конструкцией, экономичностью, широким применением и т.д. Более того, для ручной цепной лебедки / цепного блока доступны искроустойчивые элементы, такие как крюки из нержавеющей стали, бронзы, цепи, колеса и т.д. Грузоподъемность ручной цепной тали / цепного блока составляет от 0,5 до 100 тонн.
Manual hoist, as a manual lifting machinery that is easy to use and carry, also has broad application prospects in many fields in Zambia. The following is an analysis of the application of manual hoists in Zambia, combined with its working characteristics:
Рабочие характеристики ручных подъемников
Простая конструкция и удобство переноски:
The manual hoist has a compact structure, light weight, easy to carry and move, and is suitable for use in a variety of occasions.
Простота в эксплуатации:
The manual hoist can achieve lifting, pulling and lowering of heavy objects through manual operation, and the operation is simple and fast.
Безопасный и надежный:
The manual hoist adopts a ratchet friction plate one-way brake, which can brake itself under load to ensure the safe operation of the brake.
At the same time, the structural design of the manual hoist makes it have high strength and durability, and can withstand large loads.
Низкие затраты на техническое обслуживание:
The manual hoist has fewer parts and a relatively simple structure, so the maintenance cost is low and maintenance is convenient.
Сильная адаптивность:
Manual hoists can adapt to different working environments and needs. For example, lever hoists are suitable for small spaces or occasions that require non-linear traction, while hand hoists are suitable for vertical lifting and transportation.
Application analysis in Zambia
Обрабатывающая промышленность:
In Zambia's manufacturing industry, manual hoists can be used for heavy machinery and equipment lifting inside the factory, production line material handling and other operations. Its compact structure and easy portability enable it to be flexibly operated in a narrow factory space and improve production efficiency.
Строительство инфраструктуры:
In the field of infrastructure construction, such as construction sites of bridges, roads, buildings and other projects, manual hoists can be used for lifting and handling heavy materials such as steel bars and prefabricated components. Its easy operation, safety and reliability enable it to maintain efficient operation in complex construction environments and ensure the smooth progress of the construction process.
Mining field:
Zambia has rich mineral resources, and manual hoists can be used for heavy equipment lifting, ore handling and other operations in mines. Its simple structure and low maintenance cost enable it to maintain long-term stable operation in harsh mining environments and improve mining efficiency.
Сельскохозяйственное поле:
In the agricultural field, manual hoists can be used for lifting and handling of agricultural product processing equipment. Its strong adaptability and easy operation enable it to play an important role in the agricultural environment and improve agricultural production efficiency.
Складирование и логистика:
In the field of warehousing and logistics, manual hoists can be used for stacking, handling and loading and unloading of heavy goods. Its compact structure and easy operation enable it to operate efficiently in a limited warehouse space, improving the efficiency and accuracy of warehousing and logistics.
Меры предосторожности
Operation safety:
When using a manual hoist, it is necessary to strictly abide by the operating procedures and safety precautions to ensure safety during operation.
Regularly conduct safety training for operators to improve their safety awareness and operating skills.
Техническое обслуживание:
Regularly maintain the manual hoist, check the wear of its parts, and replace damaged parts in time to ensure the long-term and stable operation of the equipment.
Keep the manual hoist clean and dry, and avoid using it in a humid or corrosive environment.
Choose the right model:
According to different working environments and needs, choose the right manual hoist model and specification to ensure that it can meet the requirements of lifting operations.
5 to 50 Ton CD Type Steel Wire Rope Electric Hoist for sale to Zambia
Грузоподъемность: 5 тонн
Высота подъема: 6 метров
Рабочее напряжение: 380/3/50
MD Type Wire Rope Double Speed Type Electric Hoist for sale to Zambia
Lifting weight: 7 tons
Высота подъема: 8 метров
Рабочее напряжение: 380/3/50
Single Speed Wire Rope Electric Hoist for sale to Zambia
Грузоподъемность: 3 тонны
Высота подъема: 7 метров
Рабочее напряжение: 380/3/50
15t Steel Wire Rope Electric Hoist for Materials Hoisting for sale to Zambia
Грузоподъемность: 15 тонн
Высота подъема: 9 метров
Рабочее напряжение: 380/3/50
CD Model Materials Lifting Equipment Electric Hoist for sale to Zambia
Грузоподъемность: 5 тонн
Высота подъема: 5 метров
Рабочее напряжение: 380/3/50
Как настроить электрическую лебедку из Китая
Мы являемся производителем кранов, расположенным в Китае, и предоставляем услуги по настройке кранов для клиентов по всему миру. Если вы хотите настроить электрическую лебедку, вы можете оставить сообщение на веб-сайте или Электронная почта: sales010@cranesdq.com сообщите нам следующую информацию, и наш менеджер по продажам свяжется с вами:
Грузоподъемность, высота подъема;
Напряжение или источник питания (однофазный или 3-фазный подъемник);
Подвеска (крюк, тележка с редуктором, моторизованная тележка);
Типы элементов управления;
Рабочий цикл, скорость подъема, скорость тележки и размер балки;
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