Thursday, November 20, 2014

F1554 Bolts Have Become An Industry Standard

By Ida Dorsey


Every project has many of its own peculiarities. The F1554 was first introduced in the early nineteen nineties. It covers all anchor bolts that were intended for structural supports to all foundations made with concrete. They can either be headed bolts, bent anchor bolts or straight rods.

This type of bolt is still fairly new and was made by the American society for testing and materials. They cover all steel anchor bolts that are intended to keep all structural supports in place where concrete is used as the foundation. At Portland bolt these bolts are ready to be shipped out at a moment's notice. All galvanised bolts can be changed to the plain finish ones when they are needed promptly.

The grading of the 36 is that it has low carbon with a ksi yield steel anchor. The 55 has a high strength capacity with low alloy and the 105 is heat treated and of alloy, also with high strength capacity. Supplementary testing will only be done when specifically asked when purchased.

The S1 specification means that the grade 55 is able to be welded through a chemical composition and a carbon formula. If this is not mentioned it means that it might not be able to be welded. S2 is the manufacturer's identification which is everlastingly stamped at the end of the bolt and protrudes from the concrete for easy reference.

There are even bolts that are dipped in galvanised steel. This means that the steel or iron has gone through a chemical procedure that will help prevent it from rusting. The steel will be coated in a few layers of zinc as rust cannot damage this kind of defensive metal. The general purpose of this is that excess zinc will be left in the threads thus helping to prevent the nut from threading onto the fastener.

Rust or iron oxide helps to speed up corrosion by making more iron oxide. As this happens the outer edges of the exposed steel will flake and fall away leaving a much weaker structure behind. Chromium will form a covering which helps to prevent the spread into the inner structure.

They started off in a 6 thousand square foot stable and in the mid 1920s moved to a much larger facility where they were able to add a hot-dip galvanizing line. In 1974 they sold the business to a Morris Galen and Melvin Peters who were going to fulfil the obligations and then liquidate all the assets. During this time they found out that the business had a lot of potential and decided to sell off the galvanizing line.

The bolts are made of carbon, carbon boron and alloy and are made in three separate strength grades and two thread classes. They are all tested for their tensile strength, yield strength as well as stress areas. They all must stick to specific chemical compositions and are examined by heat and product analysis.




About the Author:



No comments: