鉄筋ワイヤータイ

Introduction

Choosing the right rebar wire tie is a critical decision in any construction project. These ties are essential for maintaining structural stability, particularly before pouring concrete. They secure reinforcing bars (rebar) together, ensuring a firm and stable connection. The type of tie used can significantly impact the project's success, with options ranging from splice ties for parallel rebar to single and figure 8 ties for intersecting rebar. This comprehensive guide will delve into the different types of rebar wire ties, their applications, factors to consider when choosing them, and safety considerations. Whether you're a seasoned professional or a novice in the construction industry, this guide will equip you with the knowledge you need to make informed decisions.

Understanding Rebar Wire Ties

Rebar wire ties are crucial for structural stability in construction projects, particularly before pouring concrete. They are used to tie sections of reinforcing bars (rebar) together, ensuring a secure and stable connection. The type of tie used can vary depending on the specific rebar connection, with options including splice ties for parallel rebar, single and figure 8 ties for intersecting rebar, and various others.

Types of Rebar Wire Ties

Understanding the types of rebar wire ties is crucial for your construction project. The most common type is the Snap Tie, which wraps a wire once around a rebar joint and is ideal for horizontal surfaces. The Saddle Tie, also known as a 'U' tie, creates a diagonal bind across different rebar sections. The Wrap and Snap Tie binds horizontal rebar sections to vertical supports, while the Figure Eight Tie is used to secure vertical reinforcement. Each tie type has its unique application and is best achieved with specific rebar tying tools.

Manual Ties

Manual tie tools are a prime example of efficient rebar tying. They offer a fast solution for tying various rebar combinations, making them a versatile choice for construction projects. These tools can tie thousands of ties per charge, delivering just the right amount of wire for increased productivity and cost savings. Compared to hand tying, using these tools can significantly reduce the risk of musculoskeletal injuries.

Loop Ties

One of the popular types of rebar wire ties is the Stainless Steel Double Loop Wire Ties. These are available in various grades of Stainless Steel, offering durability and resistance to corrosion. Double loop ties are known for their strength and are often used in heavy-duty applications. For more information about the size selection, you can download our Bar Tie Size Selection Chart. For any queries, feel free to contact us.

Bar Ties

Bar ties, also known as wall ties, are made by taking one and a half turns around the vertical bar, then one turn diagonally around the intersection. The two ends are twisted together until the connection is tight, then the excess is cut off. This type of tie is commonly used on light vertical mats of steel. Another variant is the double strand tie, a variation of the simple tie, favored in some localities and especially used for heavy work.

Snap Ties

Snap Ties are essential tools used to form concrete walls of varying widths and heights. They are part of the rebar wire tie family and play a crucial role in creating efficient form systems based on specific needs. The installation and removal of concrete formwork become significantly easier and more efficient with the use of snap ties.

Factors to Consider When Choosing Rebar Wire Ties

When choosing between bag ties and tie wires for your rebar reinforcement, several factors come into play. Tie wires, made from annealed wire, are known for their high tensile strength and durability, making them a popular choice for lashing reinforcement. They are available in various materials and are easy to use. On the other hand, bag ties, also made from annealed wire, are flexible and tough. They are easy and quick to fix due to loops at both ends. However, they are more expensive than tie wires and may not be suitable for larger projects.

Material and Durability

Rebar tie wire, also known as rebar tying wire, is made from the softest low carbon annealed steel wire. It offers excellent flexibility and corrosion resistance due to its fully galvanized and PVC coating. This soft annealed rebar tie wire can resist corrosion and is not easily broken, making it durable. Stainless steel tie wire used with rebar offers high resistance to corrosion, especially from chloride ions, making it ideal for water bridge construction. It also improves durability as maintenance and repair requirements are reduced.

Size and Shape of the Rebar

Rebar comes in a variety of different grades, represented by the minimum yield strength of the steel. The size of the rebar is indicated by a number on the rebar itself. To measure the diameter of your rebar, you can use a caliper or tape measure. For example, if you measure 12 millimeters using a caliper or find that it aligns with the 1/2" mark on a tape measure, the rebar is 12 mm or 1/2" in diameter, respectively. The appropriate rebar grade for the project is based on the structural design requirements, load-bearing capacity, and environment.

Ease of Use

Tie wires and bag ties are both used for securing reinforcement bars. Tie wires, made from annealed wire, are easy to use and convenient, with high tensile strength. They are available in various materials and have a long shelf life. Bag ties, also made from annealed wire, are flexible and tough, with loops at both ends for easy and quick fixing. Compared to cable ties, wrap-around ties are easier and quicker to use, especially when using metal hook tools. However, they are more expensive and not suitable for larger projects.

Cost-effectiveness

Advanced rebar tying tools offer significant cost savings. They include a dual wire feeder for increased productivity, a wire bender to reduce wire consumption and concrete needed to cover each tie, and a wire pull-back mechanism to dispense only the necessary wire. According to a cost-savings analysis for a contractor, the productivity and efficiency of these tools resulted in significant savings per year.

Safety Considerations

Safety is paramount when handling rebar wire ties. Workers should wear appropriate PPE, including gloves, eye protection, and possibly a hard hat, safety vest, hearing protection, and work boots. It's crucial to maintain a clean work area to prevent trip hazards. Any rebar presenting an impalement risk must be sufficiently guarded. Safety standards require protective devices capable of withstanding at least 250 pounds dropped from a height of ten feet. Fall protection and prevention measures should be in place when working above exposed rebar.

Proper Handling and Installation

Proper handling and installation of rebar wire ties are crucial for the success of your construction project. For ordinary projects, a simple snap tie would suffice in tying the rebar together. However, for cases where the force of the concrete placement risks displacing the rebar, more advanced methods of ties are needed, such as Figure 8 and the Saddle. Also, remember to chair your rebar. Chairs are extremely important in helping keep the rebar in their correct positions during construction. Lastly, don't be negligent of rebar configuration while the concrete is placed, as shifting can occur, putting the rebar out of alignment.

Compliance with Building Codes

Compliance with building codes is crucial when choosing rebar wire ties. The Building Code outlines minimum requirements for masonry anchors, including wire anchors. Wire anchors must be a minimum of 9 gauge wire with ends bent in the veneer a minimum of 2” long. They can be used with Wood and CMU backups. It's important to note that code requirements may vary depending on the jurisdiction of your project, so always check the local building codes.

Conclusion

In conclusion, the choice of rebar wire tie can significantly impact the success of a construction project. Understanding the different types of ties, their unique applications, and the appropriate tools to use is crucial. Factors such as the material and durability of the ties, the size and shape of the rebar, ease of use, and cost-effectiveness should guide your decision. Safety considerations and compliance with building codes are also paramount. By considering all these factors, you can ensure that you choose the right rebar wire tie for your project, guaranteeing structural stability and longevity. Remember, the right choice not only ensures the success of your current project but also contributes to a safer and more efficient construction industry.