螺杆完整指南：尺寸、材料、等级、切割、安装及非洲工业和建筑项目应用。了解如何选择和使用螺杆进行结构连接、管道吊装和机械安装。
What Is Threaded Rod?
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Sizes and Material Grades
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| Size | Thread Pitch | Load Capacity (8.8 Grade) | Common Application |
|---|---|---|---|
| M6 | 1.0mm | 500 kg | Light fixtures, signage |
| M8 | 1.25mm | 800 kg | Pipe hanging, HVAC |
| M10 | 1.5mm | 1,200 kg | Structural connections |
| M12 | 1.75mm | 1,800 kg | Heavy pipe, machinery bases |
| M16 | 2.0mm | 3,000 kg | Structural connections, anchor rods |
| M20 | 2.5mm | 4,800 kg | Heavy structural, marine |
| M24 | 3.0mm | 7,000 kg | Heavy machinery, bridge |
| M30 | 3.5mm | 11,000 kg | Structural engineering |
Common Applications in African Projects
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Cutting and Threading Threaded Rod
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Installation Best Practices
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Frequently Asked Questions
See frequently asked questions below.
Can threaded rod be used as an anchor bolt?
Yes, M16 or M20 threaded rod embedded in concrete (following anchor bolt embedment rules) functions as a cast-in-place anchor. For post-installed anchors, epoxy-bonded threaded rod (using injectable mortar) is a standard solution for equipment bases and structural connections in existing concrete.
What's the difference between fully threaded and partially threaded rod?
Threaded rod (studding) by definition is fully threaded along its length. What is sometimes called 'partially threaded rod' is actually a double-ended bolt (stud) — a bar with threading on both ends and a plain shank in the middle. For most industrial applications (pipe hanging, structural connections), fully threaded rod is correct.
How do I determine the correct length of threaded rod for a connection?
General rule: for a nut-and-washer connection, add the following to the grip length (distance between bearing surfaces): 1x the rod diameter for washer, 1x the rod diameter for nut, plus 2-3 threads of extra length beyond the nut. For critical structural connections, use a calibrated tension indicator or verification method to confirm proper preload.
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