The design of the zinc steel guardrail is very important because the entire zinc steel balcony guardrail is fixed by this screw. And this should take into account the strength and service life of the entire guardrail. Once the screw problem occurs, it will be fatal to the entire assembled railing. In the last decade of the appearance of the zinc steel balcony guardrail, a lot of assembly parts have been introduced by different manufacturers, and the screws used in each kind are varied.
Some manufacturers use inferior screws to assemble zinc steel balcony guardrails in order to save cost. This will inevitably cause a lot of safety hazards, and different accessories need to use different screws. For example, the fixed seat of the tensile material used on the market now, the screw of the fixed seat standard is a stainless steel pull riveting screw, the pull riveting and the tube wall are fixed together and the screw is twisted in, so that the installation is stable and the strength has been tested by the national inspection department.
And because the riveting to cover the edge of the hole, so the edge of the hole is not easy to rust, so it is a good way to assemble, but now some manufacturers in order to save cost to use the self tapping screw fixed, self tapping screws must not be used in the main force of the place, why so, because the zinc steel pipe is relative. They are relatively thin. Self tapping screws can only test the thin wall to support the force. In front of the self tapping screw, the small behind is easy to loose, loosening is easy to fall off, and the self tapping screw is directly into the galvanized pipe will destroy the pipe coating, self attack point is very easy to rust. In this way, the strength of self tapping screws is checked. If a continuous strong force is received, self tapping screws will not be able to bear.
But because self tapping screws are cheap and fast and convenient to install, they provide opportunities for many opportunistic people. This is the screw used for the fixing seat of the tensile material, and a three encircling fastener used for the fence. This fixture is a stainless steel screw, and the lock is inserted. In this way, no matter the strength is good, and anti theft and anti-theft. But now many manufacturers also use self tapping screws. The defects with self tapping screws are the same as those mentioned above. The assembly type of zinc steel balcony guardrail can use self tapping screw, but it can only be used in some places to reinforce and prevent loosening. It is impossible to use the self tapping screw in the place of the force.