1.What are bolts for large hexagonal head structures?
Bolts with large hexagonal heads are fasteners used for connecting high-strength steel structures. Its head is a large hexagonal shape that can withstand high-strength tensile and shear forces. They can provide safer and more reliable connections, so they are widely used in bridges, buildings, railways, highways, and other large-scale projects.
2.What is the difference between ASTM A325 and ASTM A490?
ASTM A325 and ASTM A490 are both standard specifications for bolts used in large hexagonal head structures. They differ in material strength. ASTM A325 is commonly used for medium strength structures, while ASTM A490 is used for large, highly loaded structures.
A325 bolts are mainly composed of TYPE1 and TYPE3. TYPE1 is used for general structure and can be Hot-dip galvanization if necessary. Weather resistant steel shall be used together with TYPE3 bolts, which shall be specially marked on the design drawing when TYPE3 bolts are used
The material strength of A490 bolt is higher than A325, but A490 bolt cannot be Hot-dip galvanization. A490 bolts are divided into three types of TYPE3 type bolts with the same weathering steel. A325 and A490 bolts have standard diameters in feet and increments of 1/8 feet, both between 1 foot and 1.5 feet, with diameters around 1 foot being more commonly used.
3.What is ASME B18.2.6-2010?
ASME B18.2.6-2010 is an American standard that specifies requirements for dimensions, materials, mechanical and chemical properties, manufacturing, and marking of bolts for large hexagonal head structures.
4.What is the function of bolts for large hexagonal head structures?
The main function of bolts used in large hexagonal head structures is to connect different parts of the steel structure, making the components a whole. They can withstand high-strength forces and have high seismic and wind resistance. Therefore, bolts for large hexagonal head structures are an important type of fastener in construction engineering.
Post time: Jul-06-2023