I have a technical question that I would like to discuss here: Which screws are particularly suitable for heavy loads? I am especially interested in their use in steel and timber construction, where the screws not only need to withstand high forces but also remain reliable over the long term. Which types and materials are recommended? Are there specific standards to consider or particular screw head designs that should be chosen? It would be great if you could share well-proven solutions from your experience, as well as tips for selection and installation.
Interesting thread!
I once had the problem of installing a heavy steel structure at a construction site at home. We used only grade 10.9 bolts, fully galvanized to prevent corrosion. It was also important for us that the holes fit precisely – holes that are too large significantly reduce the holding strength.
I once had the problem of installing a heavy steel structure at a construction site at home. We used only grade 10.9 bolts, fully galvanized to prevent corrosion. It was also important for us that the holes fit precisely – holes that are too large significantly reduce the holding strength.
GAGRAHAM schrieb:Absolutely, cotter pins or self-locking nuts provide additional security, especially with vibrations.
man sollte vielleicht auch über Sicherungselemente nachdenken, die ein Lösen verhindern.
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Timmyse3617 Apr 2022 09:01Joe52 schrieb:
The precision of the drill holes was also very important to us I can totally relate to that! I also had problems because the holes weren’t drilled accurately, which put too much stress on the screws.
One more thing: Always use a torque wrench when tightening the screws; otherwise, the screw can be damaged or the load capacity may not be guaranteed. This is often underestimated!
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warrenka5717 Apr 2022 10:23Very helpful posts here! I would like to add my perspective: Even when using the right screws, proper installation is extremely important. Pre-drilling with the correct diameter, avoiding over-tightening, and especially with wood: paying attention to the grain direction.
BENFIKRET schrieb:Exactly, standards are important. For load-bearing capacities in structures, DIN EN 14399 or ISO 898 are usually relevant. Head types can vary, but hex head screws are often standard for heavy components because a suitable wrench provides better torque control than Phillips or Torx heads.
Do you need to follow specific standards or choose certain screw head types?
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