FAQs For Infrastructure Construction Bolts

Plain, HDG, And Galvanized Askew Head Bolts For Construction

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Top Questions And Answers For Askew Head Bolts

What is the load capacity of an askew head bolt?

The load capacity of an askew head bolt will vary based on a number of factors, including bolt material, length, and diameter. Carbon steel bolts with a diameter of 3/4 inch and a length that ranges between 2 to 4 inches can provide 60,000 psi tensile strength or greater. Comparably sized askew head bolts made from stainless steel can provide 70,000 psi tensile strength or greater. These bolts will provide a workload sheer of roughly 3000 pounds.

What are askew head bolts used for?

Because of their angled inside surface, askew head bolts are used in placements that require a fastener with a sloped-headed contact. Electrical towers, shelf-angle inserts, and wedge-shaped tack hardware are some of the most common placements of askew head bolts.

What are askew head bolts made from?

Carbon steel and stainless steel are the most common materials used in the manufacture of askew head bolts. When used in interior applications, plain carbon steel askew head bolts are suitable. If resistance to corrosion is required, hot-dipped galvanized or stainless steel askew head bolts will better resist rust and other types of oxidation.

What are applications of askew head bolts?

Electrical towers and similar structures are among the more common applications of askew head bolts. As their name indicates, they are used with sloping or askew surfaces and structural elements. When wedge-shaped or shelf-angle hardware must be fastened to concrete, askew head bolts are frequently employed.

What are a307 askew head bolts?

A307 askew head bolts are slope-headed bolts that meet with all ASTM A307 standards and chemical and mechanical requirements for carbon steel bolts measuring between 1/4 inch and 4 inches in length. These bolts have a tensile strength minimum of 60,000 psi. They are made using one of two grades of carbon steel.

What are 5/8” askew head bolts?

5/8-inch askew head bolts feature a diameter of 5/8 inch. This measurement was once a standard but has since been replaced by 3/4-inch askew head bolts, which are used on new construction projects. 5/8-inch askew head bolts can still be sourced from some bolt suppliers and manufacturers.

How long are askew head bolts?

Lengths of askew head bolts range from 1 1/2 inch to 6 inches, with increments being half-inch based up to 4 inches. Extra-long askew head bolts refer to those that are 6 inches in length. U.S. bolt manufacturers and suppliers of askew head bolts offer these fasteners in inch-based measurements, although metric-based may be available. The depth of the concrete will be among the key factors in choosing the correct length of askew head bolts.

How are askew head bolts measured?

Diameter and length are the primary measurements of askew head bolts. The diameter of the bolt is standardized at 3/4 inch but this measurement was once 5/8 inch. Such bolts are still available from many providers. The length of an askew head bolt will range from 1 1/2 inches to 6 inches. This measurement is taken from the underside of the head, at the neck of the bolt, across the threaded end.

How are askew head bolts installed?

Askew head bolts are meant to be installed into concrete or similar material. They are fixed into place with a wedge insert and are sometimes paired with shims, washers, and nuts. Successful installation of these bolts requires that they are placed in the correct position so that the head of the bolt has full bearing on the insert. This is integral to the performance of the assembly.

Are askew head bolts the same as wedge inserts?

Askew head bolts and wedge inserts are not the same, but they work together to complete a fastener installation. The wedge insert is placed in the material surface and the askew head bolt is installed into the cavity of the insert’s interior face. This pairing facilitates a secure installation and still permits horizontal adjustment.