The dimension of the bending member shall mark the axis length of the arc along the curve of its radian.
5.
The same weld symbol shall be indicated by the following methods.
For the node size, the size of the node plate, the center or center distance of the bolt hole of each member, and the distance from the end of the member to the intersection of the geometric centerline shall be indicated.
2.
6.
Precautions for weld marking 1.
For the marking of double-sided welds, symbols and dimensions shall be marked above and below the horizontal line.
5.
Field installation welds 11.
Common symbols for steel structures.
Marking of common welds of penetration welds.
Linear connection symbols.
6.
Marking method of bolts.
3.
The quantity, width and thickness of battens shall be marked above the outgoing horizontal line, and the length dimension of battens shall be marked below the outgoing horizontal line.
Among the two weldments welded to each other, when only one weldment has groove (such as single-sided V-shape), the outgoing line arrow must point to the weldment with groove.
4.
7.
2.
For the cut plate, the length and position of each section shall be marked.
Dimension marking 1.
The weld symbols and dimensions shall be marked separately.
The longer fillet weld in the drawing (such as the flange weld of welding solid web steel beam) can be marked directly next to the fillet weld without the outgoing line.
8.
3.
For the non welded gusset plate, the size of the gusset plate and the distance between the center of the bolt hole and the intersection of the geometric centerline shall be indicated..
4.
When the arrow points to the side of the weld, the graphic symbols and dimensions shall be marked above the horizontal line; The weld on the other side is marked below the horizontal line.
9.
Welds welded to each other by 3 or more weldments shall not be marked as double-sided welds.
For the two weldments welded to each other, when it is a single-sided weld with bilateral asymmetric groove, the outgoing line arrow must point to the weldment with larger groove.
7.
The upper part represents the symbol and size of one side of the arrow, and the lower part represents the symbol and size of the other side; When the weld sizes on both sides are the same, it is only necessary to mark the symbol and size of the weld above the horizontal line.
Local welds 10.
In case of irregular weld distribution, while marking the weld symbol, it is advisable to add medium solid line (indicating visible weld) or fine grid line (indicating invisible weld) at the weld.
Click the blue words above to pay attention to the similarities and differences between our ~ common section steel marking methods and architectural construction drawings.
For the members of unequal angle steel, the size of one leg of the angle steel must be marked.
For members with double section steel composite section, the number and size of batten plates shall be indicated.
When the two center of gravity lines of the two members are very close, they shall be staggered outward at the intersection.
