What is a Fiberglass Ladder?

As an auxiliary facility of the city inspection shaft, the ladder materials have been made of steel bars for a long time. However, under many severe environmental conditions, such as manholes, tunnels, chemical companies, and rainy and wet occasions, the traditional metal ladders are susceptible to corrosion, which affects the safety of use and has a short service life.

1. The slope is steep, and people need to use both hands to climb the stairs.

2. An up and down ladder made of iron chains or ropes.

Steel Pipe

The current national standard "Straight seam welded steel pipe" (GB / T13793) or "Welded steel pipe for low-pressure fluid transport" (GB / T3029) as specified in ordinary steel pipe. Its quality should meet the requirements of Q235-A grade steel in the current national standard "Carbon Structural Steel" (GB / T700). Steel pipes should be steel pipes with an outer diameter of 48mm and a wall thickness of 3.5mm. It is strictly forbidden to mix steel pipes with different outer diameters, and steel pipes with severe corrosion, flattening and cracking are strictly prohibited. Fasteners shall comply with the current national standard "Steel Pipe Scaffolding Fasteners" (GB-15831), and there shall be no cracks, pores, trachoma, looseness and other defects affecting the use of fasteners. In China, the majority of 48 × 3.5 (mm) steel pipes used for fastener-type steel pipe scaffolds are welded steel pipes, which are cold-formed thin-walled steels. The material design strength f value and the stability coefficient value of the axially compressed members should be cited. The current national standard "Technical Specifications for Cold-formed Thin-walled Structures" (GBJ18). In other cases, when hot-rolled seamless steel pipes are used, the current national standard "Code for Design of Steel Structures" (GBJ17) should be cited. The size of the steel pipe is 48 × 3.5 (mm), and the weight per meter is about 38.4N. ^[1]

With the rapid development of China's economy and urban infrastructure, the demand for various types of new building materials is also increasing. As an auxiliary facility of the city inspection shaft, the ladder material has been used for a long time.

The glass fiber reinforced thermosetting composite material is mainly composed of glass fiber for reinforcement and thermosetting resin for bonding and load transmission. The tensile strength of glass fiber is very high (3450mpa). Its content, length, and laying form determine the strength of the product. The strength of thermosetting glass fiber reinforced composites can range from 30-1000mpa. Therefore, we design the amount, length and laying pattern of glass fiber according to the force of the product, output, production process and price affordability.

The rigidity of glass fiber reinforced thermosetting composite ladders is double that of other fiber reinforced materials, and it will not deform even under long-term load.

The glass fiber reinforced thermosetting composite ladder is resistant to corrosion and acid and alkali, and is especially suitable for use in humid, salt spray, acid and weak alkali environments.

By embedding directly into the wall through pre-buried installation, the positioning is accurate and firm, and the construction is very convenient.

The product's anti-aging index can reach the national standard level 4 or above, which basically meets 50 years underground and 20 years above ground.

1. According to the use requirements and the size of the hoistway, select the appropriate composite ladder specifications. If there are special requirements, it can be customized according to the actual situation.

2. Environment suitable temperature range: -20 degrees-+70 degrees.

3. During installation, the horizontal plane of the ladder must be balanced and the vertical arrangement must be neat.

4. When the ladder is pre-buried, it must be ensured that the base of the ladder fully engages with the concrete of the masonry wall, is dense, and maintains a right-angled state with the fixed wall surface to ensure the area of the base force and avoid distortion.