Anthony's FAQs

Lag Screw Torque Specifications

Are torque specifications or values available for lag screws?

There are no documented torque values for lag bolts or screws. The reason for this lies in the definition of torque when discussing threaded fasteners. To put it simply, torque is a measure of the twisting force required to spin a nut up along the threads of a bolt. Lag screw threads are driven into wood, and therefore,... Read more

Calculating Yield & Tensile Strength

How do I determine the yield and tensile strength of a specific diameter of bolt?

In most cases, the strength of a given material used to make a fastener has strength requirements or parameters described as pounds per square inch (psi) or thousands of pounds per square inch (ksi). This is helpful when analyzing what grade of material should be used for a given application, but this doesn’t tell us... Read more

Dapping Tool

Installing Timber Connectors

Can I install a Split Ring without using a Grooving Tool or a Shear Plate without using the Dapping Tool?

In theory, one could potentially carve out a groove that would be sufficient for fitting a shear plate or split ring. However the labor and ability to carve an exact fitting grove would be time consuming as well as tedious. All references to the proper installation of shear plates and split rings, such as the... Read more

Washers for Structural Bolts

Are washers required to be used with an A325 or A490 structural bolt?

It is known that the required grade of washer to be used with an A325 or A490 structural bolt is an ASTM F436 hardened washer, however whether or not a washer is required to be used in a given application is often brought into question. The purpose of using a flat washer with a bolt... Read more

Fully Threaded ASTM A325 Bolts

Can Portland Bolt manufacture a 1" x 6" fully threaded A325 heavy hex structural bolt?

Bolts manufactured to the ASTM A325 specification have a fixed thread length for a given diameter, which is often shorter than other grades of bolts. For example, a 3/4″ diameter A325 has 1-3/8″ of thread and a 1″ A325 has 1-3/4″ of thread, regardless of the overall length of the bolt. Our structural bolts product... Read more

Cutting Bolts in the Field

Is it acceptable practice to alter a bolt’s length in the field if it is too long?

Altering a bolt’s length or configuration in the field is acceptable as long as it does not change the length originally specified by the designer or engineer. If a bolt is longer than what was originally needed, the bolt can be cut down in the field. How the bolt is cut is important to consider.... Read more

Rules for Reusing Bolts

Can a bolt be reused? If so, what grades and in what scenarios?

A bolt that has already been used in a given application may or may not be reused, depending on the grade, application, and recommendation of the “Engineer of Record”. There are a tremendous number of conflicting opinions on this subject, but the only definitive published information we can find on this issue from a reputable... Read more