Screw selection requirements when installing a WPC gazebo or WPC pergola

Screw selection requirements when installing a WPC gazebo or WPC pergola

As we all know, ninety-nine percent of plastic wood projects such as plastic wood pavilions, plastic wood grape trellises, or plastic wood railings are used outdoors. The outdoor environment is different from the indoor environment. Wind and weather conditions need to be considered. When exposed to the sun, you need to consider ultraviolet anti-aging, as well as the effects of water vapor, soaking in water and even sea water. These are all different from indoor products. In order to resist various outdoor environments, a large part of the cost needs to be added to improve the plastic wood project. The performance of various parts of materials, hardware, processed parts, welded parts, etc.

For the installation of plastic wood pavilions, plastic wood grape trellises or plastic wood railings, screws must be used. Screws are a kind of fixing hardware. Mudite believes that there are not 10,000 types but 9,999 types. Screws of various materials, screws for various purposes, There are countless screws of various sizes. So how should you choose screws for the installation of plastic wood pavilion, plastic wood grape trellis or plastic wood railings?

1. Regarding material issues. Screws are made of iron, stainless steel, carbon steel, brass, aluminum alloy, even ceramic, etc. The properties of various materials are different. Since outdoor Feng Shui Japanese style plastic wood pavilions, plastic wood grape trellises or plastic wood railings directly interact with rainwater, they must be rust-proof and economical in terms of accuracy and cost. requirements, so the screws are preferably made of stainless steel. In addition, there are many types of stainless steel materials. The most ideal is to use 304 stainless steel. Of course, food grade stainless steel is a bit wasteful. Stainless steel with too low grade, such as 201 stainless steel, may still rust in some environments. Hidden danger.
2. Questions about use. According to different fixing materials, they can be divided into drill tail screws fixed to steel, wood sprout screws fixed to wood, self-tapping screws, expansion screws for forced fixing, etc. Products such as plastic wood pavilions or plastic wood grape trellises or plastic wood railings also use various types of screws. For example, the square steel base for fixing plastic wood columns uses expansion screws, and you can choose the national standard style. To fix the positioning parts to the wood-plastic material, you can use self-tapping screws from the wood bud. Since the nail-holding force of the wood-plastic material is usually worse than that of wood, and the structural composition of the wood-plastic material is different, it is easy to slip. Therefore, it is better to fix the positioning parts to the wood-plastic material. When purchasing stainless steel screws, you should pay attention to choosing types with larger pitch and larger thread depth. Generally, these types of national standard screws are more difficult to find. In many cases, they are special screws or customized screws. To fix the positioning parts to the steel, you can use drill screws. The drill screws can be selected from the national standard specifications according to the size requirements of the fixing parts.
3. Regarding the problem of screw size. This needs to be determined according to the specific location of the plastic wood pavilion or plastic wood grape trellis or plastic wood railing when it is installed. For expansion screws fixed to concrete, they should be at least M8*80 to obtain strong fixing force. For drill-tail screws that are fixed to steel, it should be ensured that after the screw passes through the steel, there is still more than 1 cm of threads that pass through the steel plate and are fixed. For stainless steel screws fixed to plastic wood materials, in addition to choosing varieties with larger thread depth and longer pitch, the length of the screws should be reasonably controlled so that the length of the screw after penetrating into the plastic wood material should be controlled at about 2 centimeters. , If the screw length is too long, it is easy to slip during fixation, which greatly reduces the fixing force. If the screw length is too short, the plastic wood material cannot be pulled at all, and the fixing force cannot be obtained.
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