BLUEPRINT READING FOR WELDERS

DETERMINING THE EXTENT OF WELDING

When fillet welds are not welded all around, or are not continuous, the extent of the welding can be shown by one of two methods. The first method shows the extent of welding graphically by the use of section lining, or some other similar definite indication, Figure 12.10. Extension lines are used as terminal points […]

Fillet Welds

The fillet weld, identified by the symbol |^, is one of the most widely used types of welds. This symbol is always drawn so that the vertical leg is to the reader’s left, Figure 12.1. SIZE OF THE LEGS The size of a fillet weld refers to the length of the legs of the weld. […]

JOINT FITUP

The design of the structure may require a joint spacing or root opening (gap) between members being welded. This is indicated by welding symbols or notes on the print. Spacing as required must ensure that the overall dimensions are maintained. For example, consider the joining of two lengths of structural shapes with a %" root […]

OTHER KINDS OF JOINTS

In addition to the basic joints, there is an assortment of other joints for special purposes, Figure 11.3. Corner flange and edge flange joints are used for light metals. The flare bevel and flare V-groove joints are used in weldments of heavier gage materials where one or two of the members have a curved shape. […]

Basic Joints for Weldment Fabrications

BASIC JOINTS The basic joints used for weldment fabrications are: butt, corner, tee, lap, and edge, Figure 11.1. Combinations of these joints are also used. For each type of joint, a number of different welds may be applied, Figure 11.1. The selection of the weld is based on a number of factors, including the thickness […]

SUMMARY REVIEW NO. 2B

Graph paper is provided at the end of this review for your use. Refer to the drawing, Chassis for Utility Trailer, page 142. 1. Name the principal views used to show the object. 11. Should this print be identified as an assembly, or should it be identified as a detail? Give an explanation for your […]

SUMMARY REVIEW NO. 2A

Refer to the drawing, Hot Water Tank, page 140. 1. How thick is the bottom head? 13. What is the distance from the top of the top head to the bottom of the bottom head? 2. How thick is the material used in the stack? 14. What are the dimensions of and © 3. How […]

WELD SYMBOL DIMENSION TOLERANCE

A tolerance applicable to a weld may be shown as a dimension within the tail of the welding symbol, Figure 10.37. SUMMARY 1. The terms arrow side, other side, and both sides refer to the location of the weld with relation to the-joint. 2. The elements that can be added to the basic weld symbols […]

MULTIPLE REFERENCE LINES AND THEIR APPLICATIONS

Additional reference lines may be applied to the basic welding symbol to show: (1) a sequence of welding operations where the first opera­tion must be completed before the next can be performed and (2) supplementary symbols applicable to the weld symbol shown on the first reference line. Note that the first reference line is the […]

LOCATION OF THE WELDING SYMBOL ON ORTHOGRAPHIC VIEWS

The welding symbol can be placed on any of the orthographic views, but is generally shown on the view that best illustrates the joint. The location of the welding symbol on each view is illustrated in Figure 10.29. However, when the symbol is shown on one view, it is not necessary to include it on […]