Elliptical Hollow Section (EHS)

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In recent years Elliptical hollow sections (EHS) have emerged to the hot-finished product range for tubular construction.

It is relatively new shape of high strength and it is attracted significant attention from engineers and architects owing to their complementary qualities of aesthetic appearance and structural efficiency. The distinctive varying curvature around the section is not only aesthetically appealing but also offers differing flexural rigidities about the two principal axes and high torsional stiffness. This cross-section creates an interesting alternative for engineers and architects in a broad range of design applications. It is also called Ellipcon section. They come in two shapes

1. Ellipcon section (Is an Ellipse)
2. Semi Ellipcon section (Half of an ellipse / D-Shape)

Both shapes are given the structure very outstanding architectural looks and the section having much structural advantage as it is like hollow section. Some of the advantages are listed below

• These Ellipcon sections are good alternate to traditional sections and they have all structural properties similar to hot hollow sections

• EHS (Elliptical Hollow Section) have greater bending capacity than the CHS (Circular Hollow Section) of the same area / Weight

• For structures with limited space these new section might provide design solution and increasing the open floor area

• For Non-Symmetric load situations this section would be more cost effective

The Ellipcon sections have constant external dimension with in the same size only thickness is increasing. EHS are generally produced with major to minor outside dimensions of 2:1

It is designated as Width X Height X Thickness, Weight is measured Kg/meter. Unit Weight of both sections will be followed my next post

For More Details about Other Hollow Section Please Click HSS

For More Details about Other Steel Section Please Click Steel

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Units of Mass

Being a construction engineer we are very often used to measure weight of steel is either Kilogram (Kg) or Metric ton (t). If kilogram is further divided we may know it is grams. If gram is further divided we may not know the units.

Some of the unit of mass are gram (gm), micro gram (µg), milligram (mg), centigram (cm), decigram (dg), dekagram (dag), hectogram (hg), kilogram (kg), mega-gram (Mg) or metric ton (t), grain, pennyweight (dwt), ounce (oz), pound (lb), dram (dr), short & long hundredweight (cwt), short & long ton, scruple (s), carat (c), gamma (y).

It is very interesting if we know other industry how they are measuring. Other than Metric unit of mass are as follows

Troy Mass (Used for measure Gold & Silver)

Avoirdupois Mass (Used for goods / based on pounds)

Apothecaries Mass ( Used in Pharmacy)

Do You want to know about Specific Gravity click Gravity
Do You want to know about Building Materials Click Building

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Unit Weight of ISDT

Indian Standard Rolled Deep Legged Tee

In continuation with my earlier posts of Tee section and ISNT, let us see about the ISDT. This is similar to Normal tee bar, However the legs are dissimilar ( Height and Width are not Equal). It is having only two sizes. ISDT 100 & ISDT 150. Unit Weights are as Follows

For More Details about Tee Sections Click TEE
For More Details about Normal Tee Click ISNT
For More Details about Indian Standards of Rolled Steel Click Steel

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Before we can LISTEN, we must be SILENT.

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