Installation of LED display and steel structure requirements, first of all, there must be supporting and fixed steel structure brackets, the design requirements of steel structure

  1. The design and construction of the steel structure of outdoor advertising facilities shall not damage the structural safety and use functions of the attached buildings and structures. During the design, the safety of the original structure shall be checked and an assessment conclusion shall be made.

  2. When choosing a steel structure scheme for outdoor advertising facilities, the requirements for steel structure production, transportation, installation and concrete construction should be considered, as well as the architectural modeling of advertising facilities and the impact of post-construction maintenance on the city appearance and environment.

  3. The safety level of outdoor billboard structure can be divided into three levels:

(1) It is a first-class billboard located in an important position, or an important advertisement, or with a service life of more than 20 years;

(2) The second-level billboards are located in the second-most important position and have a service life of more than 5 years;

(3) It is located in an open space, the personal danger is small when it is destroyed, the advertising importance is small, and the service life is not more than 5 years, it is a three-level billboard.

  Installation and support method of LED display: wall-mounted

  The horizontal sheet structure system is the key component of the wall-mounted support structure.

  The stress-strain characteristics of the two horizontal sheet structure systems, the main structure axis spacing is 7500mm, and the support point cannot be set in the middle of the maintenance platform set in the middle of the floor, so the maximum deformation point of the project occurs in the middle of the floor. According to the deformation characteristics, two structural forms are used for analysis. The node members are all 160 mmx160 mm×6 mm, the single-section steel horizontal support structure is 100mm×100mm×5mm, the composite truss horizontal support structure chord is 50mmx50mmx4mm, and the diagonal web is 30mmx30mm×3mm.

   The results show that when the total mass of the supporting structure system is the same, the composite truss structure with inclined web members has less deformation than the composite truss structure with straight web members. The results show that the use of the inclined web bar composite truss structure in the horizontal sheet structure system can effectively reduce the deformation of the support structure, especially when the frame axis spacing is large and the fulcrum cannot be continuously set in the middle area, increasing the density of the inclined web bars can effectively reduce the deformation of the support structure.

  4. The selection, arrangement and structure of the steel structure of the outdoor LED display billboard should be easy to manufacture, install and maintain, and make the structural stress list clear to reduce stress concentration. The steel structure of outdoor billboards mainly bears wind loads, and an empty structure should be adopted to reduce the wind-affected area.

(1) The minimum wall thickness of the section steel (steel pipe, channel steel, flat steel) used in the billboard exposed to the outdoor environment should not be less than 3mm, the diameter of the round steel used should not be less than 10mm, and the angle steel of the welded structure should not be less than L45X4 or L56X36X4, bolts. The connecting angle steel should not be less than L50X5,

(2) The steel structure of the outdoor LED display billboard should be designed with a reliable support system according to the structural form and the load it is subjected to.

  Basic requirements for acceptance:

1. The steel structure project construction unit should have the corresponding steel structure engineering construction qualifications, and the construction site quality management should have corresponding construction technical standards, quality management systems, quality control and inspection systems, and the construction site should be approved by the project technical leader. Construction organization design, construction plan and other technical documents.

2. The acceptance of the construction quality of the steel structure project must use the measuring instruments that have been verified and calibrated.

3. The construction quality control of the LED display steel structure project shall be carried out according to the following regulations:

(1) The raw materials and finished products used shall be subject to on-site acceptance. All raw materials and finished products involving safety and function shall be re-inspected according to the provisions of this specification, and sampling and sample delivery shall be witnessed by the supervision engineer (technical person in charge of the construction unit);

(2) The quality control of each process shall be carried out according to the construction technical standards, and inspection shall be carried out after each process is completed;

(3) Handover inspection shall be carried out between relevant professional types of work, and shall be inspected and approved by the supervising engineer (technical person in charge of the construction unit).

 4. The acceptance of the construction quality of the steel structure project shall be carried out on the basis of the self-inspection of the construction unit and in accordance with the inspection batch, sub-project, and sub-division (sub-division) projects. The division of sub-projects in the steel structure division (sub-division) project shall be carried out in accordance with the current national standard "Unified Standard for Acceptance of Construction Quality of Construction Engineering" GB 50300. The steel structure sub-project shall consist of one or several inspection batches, and the inspection batches of each sub-project shall be divided according to the provisions of this specification.

5. The qualified quality standards for sub-project inspection batches shall meet the following requirements:

(1) The main control items must meet the requirements of the qualified quality standards of this specification;

(2) For general items, 80% or more of the inspection points (values) of the inspection results should meet the requirements of the qualified quality standards of this code, and the maximum value should not exceed 1.2 times the allowable deviation value.

6. The quality inspection records, quality certification documents and other materials should be complete.

(1) The qualified quality standards for sub-projects shall meet the following requirements:

(2) Each inspection batch included in the sub-project shall meet the qualified quality standards of this specification;

(3) The quality acceptance records of each inspection batch included in the sub-project shall be complete.

7. When the construction quality of the steel structure project does not meet the requirements of this specification, it should be handled according to the following provisions:

(1) Inspection batches that have been reworked or replaced with structural (parts) parts should be re-accepted;

(2) Inspection batches that can meet the design requirements after being tested and identified by a qualified testing unit shall be accepted;

(3) Inspection batches that fail to meet the design requirements after being tested and appraised by a qualified testing unit, but which have been approved by the original design unit to meet the structural safety and use functions, can be accepted;

(4) For the sub-item and sub-projects that have been repaired or reinforced, although the external dimensions have been changed, they can still meet the safety requirements, and can be accepted according to the processing technical plan and negotiation documents.

(5) Acceptance is strictly prohibited for steel structure sub-projects that cannot meet the requirements for safe use through repair or reinforcement.

Steel:

  1. The variety, specification and performance of steel and steel castings should comply with current national product standards and design requirements. The quality of the imported steel products shall meet the requirements of the design and the standards stipulated in the contract. Number of inspections: All inspections. Inspection method: Check the quality certification documents, Chinese signs and inspection reports, etc.

  2. Sampling and re-inspection shall be carried out for steel products that fall under one of the following conditions, and the re-inspection results shall meet the current national product standards and design requirements.

(1) Steel imported from abroad;

(2) Mixed batches of steel;

(3) Thick plates with plate thickness equal to or greater than 40mm and designed with Z-direction performance requirements;

(4) The safety level of the building structure is Class 1, and the steel used for the main stress components in the large-span steel structure;

(5) Design steel with re-inspection requirements;

(6) Steels with questionable quality.

Number of inspections: All inspections. Inspection method check re-inspection report.

Welding materials:

1. The variety, specification and performance of LED display welding materials should meet the current national product standards and design requirements.

Inspection method: Check the quality certification documents, Chinese signs and inspection reports of the welding materials.

Coating material:

1. The varieties, specifications and properties of materials such as anti-corrosion coatings, thinners and curing agents for steel structures should comply with current national product standards and design requirements. Inspection method: Check the quality certification documents, Chinese signs and inspection reports of the products.

2. The variety and technical performance of the fireproof coating for the steel structure of the LED display screen should meet the design requirements, and should be tested by a qualified testing agency.