Introduction: single column advertising tower is composed of three parts: foundation, column and plate surface, commonly known as anti-aircraft gun billboard.
1. Conventional size of single column: height: 15m, 18m, 21m, 24m, 28m, 30m. Board size: 4 m × 12 m, 5 m × 15 m, 6 m × 18 m, 7 m × 21 M. the size can also be adjusted according to the actual situation and commercial benefits. There are two sides and three sides.
2. For component lofting and marking off, welding shrinkage and machining allowance shall be reserved according to process requirements. The allowable deviation of the size of the sample plate, the distance between any two holes and the hole center on the template is ± 0.5mm.
3. The relative torsion of the end face of the intersection line at both ends of the steel tube component of the anti-aircraft gun billboard along the circumferential direction should not be greater than 2.0 mm.
4. When manual cutting is adopted for cutting line and marking line of parts, the allowable deviation shall not exceed ± 2.0 mm.
5. Before the component assembly, the rust, burr and oil stain on the connection surface and within the range of 30mm-50mm along each side of the weld shall be removed.
6.单立柱结构结构制作完成后，应按施工图的要求和本标准的规定 对成品进行检查验收。构件外形和几何尺寸的允许偏差应符下列规定。 a）构件长度偏差不应超过±2mm。 b）构件整体弯曲度不应大于L/1000，且不大于3mm；局部弯曲度不应大于L/750，且不大于2mm， c）构件上节点板在平面内偏移不应大于1.5mm；节点板在平面外偏移不应大于1.0mm；节点板上螺栓孔偏移不应大于1.0mm；节点板上螺栓孔与基准线距离偏移为±1.5mm。
6. After the single column structure is manufactured, the finished product shall be inspected and accepted according to the requirements of the construction drawing and the provisions of this standard. The allowable deviation of the shape and geometric dimension of the component shall meet the following requirements. a) The deviation of component length should not exceed ± 2mm. b) The overall bending degree of the component shall not be greater than L / 1000 and no more than 3mm; the local bending degree shall not be greater than L / 750 and no more than 2mm; c) the offset of gusset plate in the plane shall not be greater than 1.5mm; the out of plane offset of gusset plate shall not be greater than 1.0mm; the offset of bolt hole on gusset plate and the datum line shall be ± 1.5mm.
7. The steel structure of single column billboard must be treated with anti-corrosion.
8.单立柱柱体钢结构除锈质量分为三级，并应符合国家行业规定。 第一级：喷钢矿砂或石英砂除锈钢材表面露出金属色泽 第二级：喷砂抛丸和酸洗钢材表面露出金属色泽 第三极：一般工具清除（钢铲、钢刷）钢材表面存留少量轧制表皮 注：1级和2级用于出厂检验，3级用于补涂时除锈处理。 钢构件防腐采用油漆时，宜做到2底3面，底漆和面漆配套使用。
8. The derusting quality of single column column steel structure is divided into three levels, which shall comply with the national industry regulations. Grade 1: spraying steel ore or quartz sand to remove rust; grade 2: sand blasting and acid pickling; grade 3: general tools for cleaning (steel shovel, steel brush) steel surface leaving a small amount of rolled skin note: Grade 1 and grade 2 are used for factory inspection, and level 3 is for rust removal during supplementary coating. When paint is used for anti-corrosion of steel members, 2 bottoms and 3 surfaces should be used together with primer and topcoat.