Which type of anchor bolts are used on equipment with high vibrations and are not grouted in place?

In equipment installations where high vibrations are present, it is essential to use anchor bolts that can accommodate movement and absorb shock. Boxed anchor bolts are specifically designed for this purpose. They typically feature a flexible connection or design that allows for the slight movement caused by vibrations without compromising the stability of the equipment. These bolts are ideal in environments where excessive vibration can lead to loosening or failure of more rigid mounting systems.

In contrast, fixed anchor bolts generally have a rigid connection and may not allow for the needed flexibility in high-vibration situations. While flexible bolts may also offer some level of movement allowance, boxed designs provide a more comprehensive solution for applications specifically facing significant vibrations. The statement that all anchor bolts need to be grouted in place is not accurate, as boxed anchor bolts are specifically utilized in situations where grouting is not employed due to the need for flexibility. This characteristic makes boxed anchor bolts the best choice for situations involving high levels of vibration.