钢网架结构在搭建过程中，部件之间的连接点就是节点，而节点的稳固性对钢网架结构是非常重要的，所以一定要对其进行检验，主要有以下几方面的检查。
During the construction process of steel grid structures, the connection points between components are nodes, and the stability of nodes is very important for steel grid structures. Therefore, it is necessary to inspect them, mainly in the following aspects.
检验一、连接板的检查：检测连接板尺寸(尤其是厚度)是否符合要求；用直尺作为靠尺检查其平整度；测量因螺栓孔等造成的实际尺寸的减小；检测有无裂缝、局部缺损等损伤。
Inspection 1. Inspection of the connecting plate: Check whether the size (especially thickness) of the connecting plate meets the requirements; Use a ruler as a guiding rule to check its flatness; Measure the actual size reduction caused by bolt holes, etc; Check for cracks, local defects, and other damages.
检验二、对于螺栓连接，可用目测、锤敲相结合的方法检查。并用扭力扳手(当扳手达到一定的力矩时，带有声、光指示的扳手)对螺栓的紧固性进行复查，尤其对高强螺栓的连结更应仔细检查。此外，对螺栓的直径、个数、排列方式也要一一检查。
Inspection 2. For bolted connections, a combination of visual inspection and hammering can be used for inspection. And use a torque wrench (a wrench with sound and light indications when the wrench reaches a certain torque) to recheck the tightness of the bolts, especially for the connection of high-strength bolts. In addition, the diameter, number, and arrangement of bolts should also be checked one by one.
检验三、焊接连接目前应用广，出事故也较多，应检查其缺陷。焊缝的缺陷种类不少，有裂纹、气孔、夹渣、未熔透、虚焊、咬边、弧坑等。
Inspection 3: Welding connections are currently widely used and have many accidents, and their defects should be checked. There are many types of defects in welding seams, such as cracks, pores, slag inclusions, incomplete penetration, faulty welding, undercuts, and arc pits.
检验四、检查焊缝缺陷时，可用超声探伤仪或射线探测仪检测。在对焊缝的内部缺陷进行探伤前应先进行外观质量检查。
When inspecting weld defects, ultrasonic flaw detectors or radiographic detectors can be used for detection. Before conducting inspection on internal defects in the weld seam, an appearance quality inspection should be conducted.
检验五、焊缝表面质量的检验可目测或用10倍放大镜，当存在疑义时，采用磁粉或渗透擦伤。如果焊缝外观质量不满足规定要求，需进行修补。
Inspection 5. The inspection of the surface quality of the weld seam can be done visually or with a 10x magnifying glass. When there is any doubt, magnetic powder or penetration scratch can be used. If the appearance quality of the weld seam does not meet the specified requirements, repair is required.
检验六、焊缝的外形尺寸一般用焊缝检验尺测量。焊缝检验尺由主尺、多用尺和高度标尺构成，可用于测量焊接母材的坡口角度、间隙、错位、焊缝高度、焊缝宽度和角焊缝高度。
Inspection 6. The overall dimensions of the weld seam are generally measured using a weld inspection ruler. The weld inspection ruler consists of a main ruler, a multi-purpose ruler, and a height ruler, which can be used to measure the groove angle, gap, misalignment, weld height, weld width, and fillet weld height of the welding base material.