TECHNICAL DRAWINGS FOR STRUCTURAL METAL WORK

Structural metal work (SMW) specifies complementary rule to general principles of presentation and dimensioning necessary for assembly and detail drawings .

SMW consisting of plates and sheets , profile section and compound elementsLifting and transport appliances;Storage tanks and pressure vessels;Lifts , moving stairways and conveyor belts;Etc.;

REFERENCE : SP46

Representation of Holes, Bolts and Rivets Representation on projection planes normal to their axes

-in order to represent holes ,bolts and rivets on projection planes normal to their axes, the symbols represented in thick lines, shall be used.

Representation of holes, bolts and rivets

Hole RepresentationRepresentation on projection planes parallel to their axes

Only horizontal line representing the symbol is thin line, all other lines are thick

Bolts or rivet to fit in hole

The projection lines shall be separated from the symbols of holes, bolts and rivets on projection planes parallel to their axes

Dimensioning

Dimensioning and lengths of arcsat the side of the developed lengths of arcs,

the bending radius to which these lengths refer shall be indicated in brackets

Dimensioning of bars, profiles section, plates and sheets

Plates and sheets -

Plates and sheets shall be designated by their thickness followed by the overall finished dimensions of the enclosing rectangle .

symbols for bars and profile sections

Symbolic representations and their significance

Bars and profile sections

Diagrammatic representation

Structural metal work can be repeated diagrammatical lines of the intersecting elements.

In this case, the values of the distance between the reference point of the centroidal lines shall be indicated directly on the represented elements.

Diagrammatic representation –structural metal work