There are many standard and custom sizes and options when it comes to fasteners. Just as there are all different sizes, there are also standard styles, and then there are styles that are less common for general types of applications.
When it comes to J bolts, the most common type is the design with the rounded hook. This is typically what is meant whenever construction plans call for any type of U bolt as an anchor for concrete and wood or metal construction.
However, for many jobs, the rounded interior of the standard J bolt doesn’t provide the anchoring ability or the shape necessary for the job. In these cases, the flatter, longer hook of square J bolts may be just what is needed. With some fabrication, the square shape of the hook is also ideal for anchoring or fastening to square tubing, channels or other structural materials.
The Shape
The shape of square J bolts is important to consider for several reasons. The specific bend on the bolt hook will be determined by the equipment that the custom manufacturer operates.
Top custom fabricators of these bolts will offer any angle and hook length that is required. Always verify with the company they have the equipment for the specific shape you need.
Hook Strength
It will be important to consider force and pressure on the square J bolts when creating a custom shape. The longer the flat part of the square bottom of the hook, the less force that it will take to potentially bend or twist the bolt.
These factors can be adjusted by choosing a larger diameter for the bolt which will provide additional strength. It will be essential for you have any concerns about the ability of the square hook, particularly as it gets longer, to be able to hold the weight of the wall or attachment without twisting or bending.
