The level load test grade inspection company for residential project railings in Jiang'an District, as well as the construction and maintenance loads, are crucial. Each parameter must be mastered to ensure quality and safety during actual construction.
General Provisions for Horizontal Load Thrust Testing of Wuhan Guardrails
1. Measuring instruments (such as micrometers, displacement gauges, etc.) must be calibrated and meet the requirements for measurement before testing. Loading devices (such as jacks or weights, etc.) should also be verified and meet the requirements before testing, and they should satisfy the test precision standards. Article Explanation: The precision requirements for the jacks used in testing should ensure that the force value deviation does not exceed +2%.
2. The flat dimensions, material of the posts, anchoring methods, and installation techniques of the basic inspections for guardrails should be consistent with those of the guardrails in the project. Article Explanation: The flat dimensions and material of the guardrails used for testing should match those used in actual projects. For conventional guardrails made of iron, wood, glass, etc., which have practical engineering application experience, the load-bearing capacity test may be omitted, and only the corresponding acceptance tests as required by this procedure should be conducted.
For guardrails anchored with bolted or welded connections at the root, testing should be conducted after the detailed construction at the connection points is completed.
Samples must include at least 3 divisions horizontally. The specifications, materials, construction, and installation methods of the samples should be consistent with the actual project, and no additional facilities should be added during testing.
5 Calculation of force F applied to convert uniformly distributed load to point loads at two locations: 2 qL F Where: F - Force applied at each point (N); q - Uniform load value (N/m); L - Length of the specimen (m).
Prior to testing, it is advisable to conduct a preliminary compression to check if the testing equipment is functioning properly. The preliminary load can be set at 20% to 30% of the test load.
Explanation: After the detection device is subjected to force, there is often a portion of non-recoverable deformation due to installation issues. Through preliminary compression, not only can the normal operation of the detection device be verified, but it can also significantly reduce this deformation.
The load-bearing capacity and stiffness of the loading device should meet the requirements of the maximum test load.
