1.Why are cold-rolled coils unsuitable for use as temporary bridge decks?
The surface is too smooth, resulting in extremely poor anti-slip properties.
Core safety issue: Temporary bridges on construction sites need to accommodate heavy vehicles (such as concrete mixer trucks and dump trucks) and construction workers. The smooth surface of cold-rolled coils makes them extremely slippery in rain, snow, and muddy conditions, causing serious safety accidents. This is its biggest disqualifying factor.
Insufficient wear resistance and impact resistance
The harsh environment of construction sites means the base plate will continuously bear the impact and friction from vehicle tires (especially those with anti-skid chains), tracks, and falling gravel.
The relatively low surface hardness of cold-rolled coils makes them easily scratched, dented, and even plastically deformed, leading to uneven bridge surfaces and accelerated damage.
Inappropriate and costly anti-corrosion treatment
Temporary bridges require a moderate level of corrosion resistance (typically for a service life of several months to several years).
Cold-rolled coils are often shipped as bare sheets or with only a layer of temporary anti-rust oil. Hot-dip galvanizing is too expensive and uneconomical for temporary facilities.
2.Can hot-rolled patterned steel plates be used as the base plate for temporary bridges on construction sites?
Hot-rolled checkered steel plate (the most mainstream and recommended choice)
Material: Typically Q235B or Q345B hot-rolled plate.
Advantages:
Excellent anti-slip properties: The surface has raised diamond or lentil-shaped patterns, providing excellent anti-slip performance.
Outstanding impact and wear resistance: Hot-rolled materials have good toughness and are available in large thicknesses (commonly 6mm, 8mm, 10mm), capable of withstanding heavy loads and impacts.
Good load-bearing rigidity: Thick plates are not easily bent or deformed.
Economical and practical: Hot-rolled checkered plates are industrial plates specifically designed for anti-slip and load-bearing applications, with a relatively reasonable price and the highest cost-effectiveness.
Corrosion protection options: Bare plates (for short-term use), sprayed with anti-rust paint, or hot-dip galvanized (for modular temporary bridges requiring long-term turnover) can be selected as needed.
3.What are the advantages of using anti-slip grating?
Advantages: Lightweight, excellent drainage, slip-resistant, and does not easily accumulate mud.
Applications: Commonly used for pedestrian walkways, maintenance platforms, or as a supplement to vehicle walkways. When used as a heavy-duty flooring for pure vehicle walkways, heavy-duty grating with extremely high load-bearing capacity must be selected.
4.What are the advantages of using thick-gauge hot-rolled flat plates?
Sometimes, a thick hot-rolled flat plate is used as a load-bearing base plate under the patterned plate, and then the patterned plate or asphalt layer is laid on top to form a composite bridge deck.
5.Is high-strength cold-rolled coil suitable for this application?
While high-strength cold-rolled steel coils can bear a certain weight from a purely materials mechanics perspective, considering construction safety, durability, economy, and industry-standard practices, cold-rolled steel coils are completely unsuitable for the base slabs of temporary construction site bridges.
Hot-rolled patterned steel plates should be the preferred choice for the base slabs of temporary construction site bridges. This is a safe, reliable, and economical option proven through long-term engineering projects. If you are planning the construction of a temporary bridge, be sure to follow the structural design and use industry-standard materials.