How to identify the renovation door?
There are few appearances on the market for security doors, but the price is a few hundred dollars. Most consumers often pay attention to whether the style is beautiful or not. According to the feeling, the door is visually inspected. At most, the door is knocked on the door and the door lock is tried. I don’t know the quality of the two. do not. Therefore, pay attention to the following key points when purchasing:
First: the thickness of the anti-theft door steel plate must be above 1.0 cm. The materials used for the qualified anti-theft security door must meet the requirements of the national standard. The thickness of the steel plate used for the door frame of the steel anti-theft door should not be less than 2 mm. The front and rear panels of the door leaf are generally thick. In the steel plate between 0.8-1 mm, the inside of the door leaf is provided with a skeleton and a reinforcing plate, and filling fillers such as crepe paper foaming and aniline paper foaming increase the door's resistance. Door locks, hinges and other hardware accessories must also achieve anti-theft performance.
Second: To check whether the old door is refurbished, you can pay attention to the process of turnkey. Under normal circumstances, the packaging of the new security door is intact, the installation worker is packaged in front of the customer, the key should be in the package, and the key packaging should be complete. The lock core should be installed in front of the customer. After locking, give the key to the customer. But if the door's packaging itself is damaged, and the key is in the worker's pocket, it may be a refurbished door.
HDPE ( Uniaxial geogrids(ux Geogrid) ) : Ultimate Tensile Strength 30kN/m to 300kN/m, HDPE geogrids (Uniaxial ) range : Flexurally stiff biaxial monolithic and integrally formed geogrid constructed of PP- Polypropylene or HDPE – polyethylene by a unique punching and drawing process .
1. It reinforce old asphalt concrete road surface and asphalt layer, and prevents damage ;
2. It is used for rebuilding cement concrete road surface into composite road surface and restraining reflection caused by block contraction .
3. It is used in road expansion and improvment project and crack caused by old and new combination position and uneven sedimentation ;
4. It is used in soft soil base reinforcement treatment , is favorable for soft soil water separation and concretion,restrains sedimentation effectivly,distributes stress uniformly and improve overall strength of road base;
5. It is sued for preventing contraction crack caused by new road semi-rigid base layer,and reinforces and prevents road surface crack caused by foundation crack reflection.
Hdpe Uniaxial Geogrid, Polyethylene Uniaxial Geogrid, Polyethylene Extruded Laminated Geogrid
Feicheng Lianyi Engineering Plastics Co., Ltd , http://www.lianyigeosynthetics.com