Large outdoor billboard steel structure

The production of outdoor billboards should be done by the design unit in compliance with the architectural design requirements of the overall layout of the building and the design of the building facade, and the construction drawings should be Close coordination with design; twenty years is the design life of large high-post outdoor billboards, and other types of outdoor billboards are designed for ten years. The load for setting up outdoor billboards should be specified in 1. The basic wind pre ssure should be implemented at 0.45kN/m2, and the height coefficient, wind vibration coefficient, shape coefficient, etc. should be considered; for earthquake-prone areas, the combination of earthquake effects and other loads should also be considered. The steel structure used in outdoor billboards should comply with the relevant provisions of GB50017 and the "Technical Specifications for Steel Structures of Outdoor Billboards" 3, and the torsional strength check calculation of the steel structure connecting parts should be considered.

Second: The basic structure design of outdoor floor-standing billboards should meet the following requirements:

① Outdoor floor-standing billboards should be based on the soil conditions and structural foundation requirements of the construction site. And the ground foundation strength should be calculated reasonably. If necessary, the stability of the ground foundation against sliding should be calculated. The area of ​​the bottom of the foundation away from the foundation shall not exceed 1/4 of the area of ​​the foundation;

② Based on a rigid foundation, the usual eccentric load should comply with the "Building Foundation Design Code" GB50007 for outdoor floor-standing billboards Design;

③When the foundation is lower than the groundwater level, the buoyancy effect of groundwater on the foundation and casing should be considered, and the groundwater should not be corrosive to the foundation, and corresponding anti-corrosion treatments should be carried out;

④ When the soft soil layer of the foundation layer is relatively thick, the upper load is large and concentrated, and the shallow foundation cannot meet the requirements for bearing capacity and deformation of the outdoor floor-standing billboard steel structure foundation, so a caisson or pile foundation can be used. The pile foundation uses pre fabricated reinforced concrete piles, cast-in-place concrete piles or steel pipe piles. This type of pile foundation should be determined after compre hensive analysis based on geological conditions, structure type, load size, construction conditions and the environment of the construction site. The calculation of the pile foundation is carried out in accordance with the "Design Code for Building Foundation Foundation" standard of GB50007.

Third: The design of the bracket base of outdoor rooftop billboards should meet the following requirements:

① Outdoor rooftop billboards should not be connected with friction expansion bolts. It is necessary to use good chemical anchors, planting bars and self-wall anchors, which must have pre cise technical parameters and quality assurance systems;

②The layout of the bracket base of the outdoor roof billboard should be consistent with the roof column With proper network layout, the billboard structure should be able to directly bear the load-bearing pre ssure, tension and shear force;

③The base of the outdoor roof billboard bracket can be welded with bolts, anchor bolts, top beams and embedded parts in the column connection, and can effectively and reliably disperse the load from the base of the advertising signage bracket to the bearing capacity of the substructure;

④ The embedded depth of concrete bolts or anchor bolts should reach 30 to 40D (d is the diameter of the bolt ); The installation of anchor bolts should meet the technical requirements of the products used. When the embedding depth is not enough, welding with beam and column steel bars should be used, and at the same time, sufficient thickness of the concrete protective layer must be ensured.

Fourth: The lightning protection and grounding design of outdoor billboards should meet the following requirements:

① Outdoor billboards should take appropriate lightning protection measures based on the environment they are in, including Protect against lightning and lightning attacks.

② Outdoor billboard lightning protection facilities (including access equipment, shunts, grounding equipment, overvoltage protection equipment and other connecting conductors) should be designed according to the lightning protection environment and the environment in which they are located. Lightning protection design must pre vent direct lightning and lightning attack measures;

③When installing outdoor billboards on the roof of a building or on an exterior wall, the lightning protection facilities can be grounded with the building's lightning protection Combined with system design;

④ When installed on the roof of a multi-story residential building, outdoor billboards should be welded to a steel structure frame, metal plate and residential building lightning protection system, and ensure that its grounding resistance is not greater than 4Ω , otherwise an additional lightning protection grounding system is required;

⑤The grounding system of outdoor billboards should form an equipotential connection;

⑥The steel structure frame, metal plates, etc. of outdoor billboards can As connecting air-termination equipment, down-line lightning protection equipment, but must be connected with multi-point welding connections to the floor and wall lightning protection system down-conductors;

⑦In independent outdoor billboards, in addition to being installed on protected The lightning protection belts, lightning protection nets, steel frames, metal plates and steel columns inside and outside should be effectively grounded. Grounding wires can be shared or laid separately; building lightning protection grounding and other lightning protection grounding equipment, including various types of metal pipes, should be connected to the same lightning protection grounding facility.

When embedded parts should be used between the steel structure and concrete structure of outdoor billboards, it is strictly prohibited Use friction expansion bolts for anchoring. When special embedded parts are installed unconditionally, other reliable connection measures should be taken, but they must be verified through force calculation and testing to ensure safety. Wall billboards should be attached to the wall of a house or structure to determine or verify that the wall of the house or structure can reliably withstand the transmission of billboards

The installation of outdoor billboards should take into account urban planning, the current status of municipal public facilities, Surrounding environment and post-construction maintenance conditions. The shape of outdoor billboards should be coordinated with the surrounding environment. The fire protection of outdoor billboards should comply with the relevant regulations of GBJ16. The design of outdoor billboards should be entrusted to a design unit with Grade B or above architectural design qualifications. The selection, layout and structure of the steel structure of outdoor special billboards should be convenient for production, installation and maintenance, make the stress on the structure simple and clear, and reduce stress concentration. The steel structure of outdoor billboards mainly bears wind load, so it is advisable to adopt a hollow structure to reduce the wind area. The minimum wall thickness of steel sections (steel pipes, channel steel and flat steel) used in billboards exposed to the outdoor environment should not be less than 3mm, the diameter of round steel should not be less than 10mm, and the angle steel of welded structures should not be less than _45×4 or _56× 36×4, the angle steel for bolt connection should not be smaller than _50×5.

Refers to enterprises, institutions, individual businesses, etc. that use signs, light boxes, neon monograms, etc. as media forms, register their registered address with the unit, and use self-owned or leased buildings, structures, etc. The name of the household or other social group (including logo, etc.). Refers to the use of light boxes, neon lights, electronic display devices, display boards, etc. as carriers on urban roads, highways, railway sides, ground parts of urban rail transit lines, river and lake management areas and squares, vehicle body advertisements, buildings, and structures. Forms and commercials set on vehicles.

Qizi Steel Structure has demonstrated strong capabilities in the field of anti-aircraft gun billboard project construction.
Qizi Steel Structure is not only good at processing billboard structural products, but also has a dedicated processing workshop to ensure product manufacturing quality.
At the same time, Qizi Steel Structure also has its own labor service company, which is responsible for the installation of billboards, forming a complete industrial chain.
In terms of qualifications, Qizi Steel Structure, as a construction enterprise, has all necessary qualification certificates, ensuring its legality and compliance during the construction process.
The labor service company responsible for the installation of billboards also has its own installation qualifications and safety production licenses, ensuring the professionalism and safety of the installation work.
In summary, Qizi Steel Structure not only has strong processing and installation capabilities in the construction of anti-aircraft gun billboard projects, but also has complete qualifications and licenses, demonstrating its expertise in this field level and reliability.

10-20 years.
Most outdoor billboards are made of steel structures, which are easily damaged over time. Large high-post outdoor advertising facilities are designed to have a service life of 20 years, and other types of outdoor advertising facilities are designed to have a service life of 10 years.
1. First-class billboards located in the most important locations, or the most important advertisements, or used for up to 20 years. 2. The second most important advertisement located in the next most important position and used for more than 5 years is a secondary billboard. 3. If it is located in an open space, there is little personal risk when destroyed, the advertising importance is small, and the service life is not more than 5 years, it is a third-level billboard. Newly installed outdoor billboards will need to undergo a billboard safety inspection after 2-3 years of use; billboards that continue to be used after outdoor billboard safety inspections can be used for another 2 years with paint anti-corrosion and hot-dip galvanized anti-corrosion. of billboards can last another 5 years. Thereafter, the painted anti-corrosion billboards should be inspected every 2-3 years, and the hot-dip galvanized anti-corrosion billboards should be inspected every 5-8 years.