Eiffel 101: 7 Types of Bridge Overhang Brackets
Bridge overhang brackets are a vital part of the concrete formwork used in the construction of bridge deck overhangs. Overhang brackets secure and support all of the other formwork used in the creation of overhangs. They are commonly made of steel and built to withstand heavy loads and significant pressures. Installation of bridge overhang brackets is usually fairly quick and simple. There are even types of bridge overhang brackets that are engineered to be able to be installed as a group all at once. Most types of these brackets can be affixed to concrete beams, concrete box beams, or steel beams. Bridge overhang brackets are removed once the desired concrete shape for a bridge deck overhang has set. After they are removed, they can be re-used or sold.
MOST POPULAR TYPES
The various types or categories of bridge overhang brackets differ based on capabilities, size, and adjustment qualities. For the purpose of this article, we will be discussing the different types of bridge overhang brackets produced by Dayton Superior, a popular overhang bracket manufacturer. The list of types of bridge overhang brackets below helps illustrate the scope of possibilities offered by these formwork components.
1. C49 – This is the basic overhang bracket in the C49 series. It’s a versatile option and boasts a horizontal length of 54 inches and a vertical adjustment range of 30 inches to 50 inches.
2. C49D – Meant for use on bridge structures with deep beams, this category of overhang bracket is pretty similar to the C49. However, it comes with longer legs, vertically and diagonally. Like the C49, its horizontal length is 54 inches. Its vertical adjustment range is 50 inches to 70 inches.
3. C49S – A top choice for use with shallow beams, the C49S is a modified type of bracket. It has a removed inner vertical leg. With the use of its outer vertical leg, it can be adjusted to a vertical height of as little as 14 inches. Its horizontal length is 54 inches, and its vertical adjustment range is 14 inches to 28 inches.
4. C49W – This type of C49 bracket is designed to prevent bending of the web of beam during bridge overhang deck construction.
5. C49JR – This is the “junior” option in the C49 series. It is ideal for use when dealing with a limited amount of space between twin bridges. Its horizontal length is 27 inches, and its vertical adjustment range is 16 inches to 28 inches.
6. C89 – The C89 series of bridge overhang brackets are considered “heavy-duty,” which means they are extra-long and extra-strong and offer a significant amount of support for heavy vertical loads. The C89’s horizontal length is 72 inches.
7. C89L – This type of heavy-duty bridge overhang bracket is engineered to offer the most strength and adjustability. Its horizontal length is 90 inches, and its vertical adjustment range is 30 inches to 68 inches. An exterior hanger attachment is typically used with this type of overhang bracket.
FINAL THOUGHTS
These are just some of the options on the market from one specific manufacturer of bridge overhang brackets, but they offer a look into how many choices are available to companies searching to find the right fit for their bridge deck overhang construction project.
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