It's very important to choose the screw for the assembled design of iron fence, because the whole 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 fails, it is very dangerous for the whole assembled railing. In the balcony guardrail appeared in this decade, different manufacturers have launched a lot of assembly accessories, and a kind of accessories use a variety of screws.

有些廠家為了節(jié)省成本使用比較劣質的螺絲來組裝陽臺護欄，這樣會造成很大的隱患啊，而且不同的配件需要針對性的使用不同的螺絲。比如現在市面上使用的拉伸料的固定座，這個固定座標準的配備的螺絲是不銹鋼的拉鉚螺絲，拉鉚和管壁固定在一起然后螺桿扭進去，這樣安裝很穩(wěn)固，強度也是經過檢測部門檢測過的。

In order to save cost, some manufacturers use inferior screws to assemble balcony guardrail, which will cause great hidden danger. Moreover, different accessories need to use different screws. For example, the fixed base of stretch material used in the market now is equipped with stainless steel riveting screws. The riveting and pipe wall are fixed together, and then the screw is twisted in, so the installation is very stable, and the strength has been tested by the inspection department.

 

而且因為拉鉚把鉆孔的邊都包裹住了，這樣孔邊也不容易生銹，這樣本來是好的組裝方式，但是現在有些廠家為了節(jié)省成本使用自攻螺絲固定，自攻螺絲不能用在起主要作用力的地方的，為何這樣說呢，因為管子相對都比較薄，自攻螺絲攻進去也只能考那么薄的管壁來支撐力。自攻螺絲前面小后面大很容易就松動了，松動了很容易脫落，而且自攻螺絲是直接攻入鍍鋅管內會破壞管子的涂層，自攻點很容易生銹。

Moreover, because the riveting covers the edges of the holes, it is not easy to rust. This is a good assembly method. But now some manufacturers use self tapping screws to fix them in order to save costs. The self tapping screws can't be used for the main force. Why do we say that? Because the pipes are relatively thin, the self tapping screws can only be used to test the thin pipes Wall to support the force. The self tapping screw is easy to loose when it is small in front and large in the back. If it is loose, it is easy to fall off. Moreover, the self tapping screw directly enters the galvanized pipe, which will damage the coating of the pipe, and the self tapping point is easy to rust.

但是因為自攻螺絲本身便宜，而且安裝快捷方便，給很多的投機取巧的人提供了機會。這個是說的拉伸料固定座使用的螺絲，還有一個圍欄用的三包圍固定件，這個固定件是采用不銹鋼的防拆螺絲，穿插鎖。這樣不管強度好，而且防拆防盜。

But because the self tapping screw itself is cheap, and the installation is fast and convenient, it provides opportunities for many opportunistic people. This refers to the screw used in the tensile material fixing base, and a three encircling fixing part for the fence. The fixing part is made of stainless steel anti detachable screw and inserted lock. In this way, no matter the strength is good, and it can be disassembled and burglarproof.