Skip to main content

Why Dowel plate is used in Industrial warehousing Concrete flooring?

 1. Why Dowel Plates are used?

  In a warehouse, concrete floor slabs are cast in sections. Without a connector, when a heavy forklift drives from one slab to another, the first slab deflects (bends) downward, creating a "step" that the wheels hit. This leads to: Faillure of Concrete floor.

  • Joint Spalling: The edges of the concrete break off.

  • Load Transfer: Dowel plates allow the load to be shared between two adjacent slabs, ensuring they move together vertically while allowing for horizontal shrinkage.

to avoid such  a cracking for long term flooring to be maintained dowel plates are used.


2. Technical Specifications:

Unlike traditional round dowels, plate dowels (usually diamond or rectangular shaped) offer "2D" movement.

  • Material: Typically E250 or E 350 Grade Steel .

  • Sleeve Material: High-density polyethylene (HDPE)  or ABS to allow the steel to slide as concrete shrinks. abs matetrial For high temp it can sustain.

  • Plate Thickness: Usually 6mm, 8mm, 10mm, or 12mm., depenimng on floor size we can design dowel plate size.

  • Standard Compliance: Designed according to TR34 (4th Edition) .this is internation code used across world by concrete engineers.

3. Dowel Plates Data :

PropertyValue (Standard Industrial)
Yield Strength235 - 355 MPA
Plate Dimensions110mm x 110mm (Diamond) or 150mm x 120mm (Rectangular)
CoatingHot-Dip Galvanized (for corrosion resistance)
Free MovementUp to 20mm (Horizontal)

4. Sizing Calculation Example:

  • Slab Thickness < 150mm: Typically uses 6mm plates at 450mm spacing.

  • Slab Thickness 150mm–200mm: Typically uses 8mm or 10mm plates at 300mm–450mm spacing.

  • Heavily Loaded (VNA Warehouses): Usually 12mm plates are required to ensure zero vertical deflection.



5. Advantages:

  • Reduced Concrete Stress:  Diamond shapes allow the slab to expand and contract in two directions, preventing "corner cracking."

  • No Drilling Required: Sleeves are attached to the formwork before pouring, saving labor costs compared to drilling for round bars.

  • Higher Load Transfer Efficiency: Plates provide a wider surface area against the concrete compared to round bars, reducing the risk of concrete "bursting."

  • Forklift Longevity: Smooth joints mean less vibration and damage to expensive forklift tires and electronics.

6. Application Era (The Modern Warehouse):

  • Cold Storage: Slabs shrink significantly in sub-zero temperatures. Plate dowels are essential here to allow for large joint openings (up to 20mm) while maintaining load capacity.

  • Airport Hangars: Used in heavy-load areas where maintenance and repair downtime must be avoided at all costs.

Comments

Post a Comment

Popular posts from this blog

Why are High-Speed MBT Bolt Couplers replacing traditional rebar splicing?

  Why should you choose MBT bolt couplers for high-stress structural joints? MBT ( Mechanical BOLT TYPE ) bolt couplers for high-stress joints is often a strategic decision based on reliability and the elimination of complex bar preparation. In high-stress environments—like bridges, high-rise foundations, or power plants—the integrity of the rebar splice is non-negotiable. Why are High-Speed MBT Bolt Couplers replacing traditional rebar splicing? High-speed MBT bolt couplers are becoming the industry standard because they solve the three biggest headaches in modern construction: time, space, and technical complexity. In high-stakes projects, traditional methods like "lapping" (overlapping bars) or "threading" (cutting screw threads into bars) are often too slow or physically impossible to execute. Here is why they are a preferred choice for structural And Mechanical engineers: 1. No Bar End Preparation Required: Unlike threaded couplers, MBT couplers do not requi...
Post a Comment
Read more

Why Plastic Encapsulated Footsteps are Replacing Cast Iron in Modern Construction?

 The Ultimate Guide to PVC & PP Footsteps: Types, Applications, and Technical Specs 🏗 1. Why Construction  Industry Shift from Metal to Plastic PVC Rungs?  Cast iron was the standard for manhole rungs. However, corrosion and "stepping accidents" led to the rise of polymer-based footsteps. Today, Polypropylene (PP) and Polyvinyl Chloride (PVC) are the industry leaders due to their durability and chemical resistance. 2. Different Types of Plastic Used in PVC Rungs: In construction, not all plastics are created equal. The two primary materials used for footsteps are: A. Polypropylene Copolymer (PPCP) The Build: High-impact polymer usually molded over a reinforced steel bar. Why it's used: It is virtually unbreakable. Unlike standard plastic, PPCP doesn't get brittle in cold weather or soft in high heat. B. Polyvinyl Chloride (PVC) The Build: Typically used for lighter-duty applications or as edge-protection (Step Nosing). Why it's used: Excellent fire-reta...
Post a Comment
Read more

Why MBT Couplers are used ?

Why MBT Couplers are used ? 1. Strong mechanical and electrical connection MBT couplers use shear-head bolts that tighten onto the conductor. This ensures: Good electrical conductivity Firm grip that doesn’t loosen easily 2. No special tools required Unlike crimping (which needs hydraulic tools),  MBT couplers: Only need a standard wrench/spanner Are easier to install in field conditions 3. Suitable for different conductor sizes Many MBT couplers are designed to accommodate  a range of cable sizes , making them flexible for installation. 4. Reliable in harsh environments They are usually made from high-strength alloys and are: Corrosion-resistant Suitable for outdoor or underground use Types OF MBT Couplers: LOW Spped MBT Coupler  HIGH Speed MBT Coupler LN Key BOLT MBT Coupler Applications: In construction, MBT (Mechanical Bolt-Type) couplers are mainly used for joining TMT bars (rebars) without welding or threading. These are often called bolted ...
Post a Comment
Read more