SAIL is one of the largest steel producers in India
SAIL contributes immensely in developing infrastructure for the country
SAIL is a one-stop-shop for all steel products. Sells 50+ products in 500+ grades and 5000+ dimensions
Our latest product is NEX Parallel Flange Sections
From SAIL's state-of-the-art mills
Parallel Flange Sections (IS 12778) are hot rolled steel structural sections, with parallel flanges having square toes and curves at the root of flange and web
Parallel Flange Sections meet international standards of quality and stringent requirements of the infrastructure and construction industries
Parallel sections are preferred by today's structural engineers, architects and construction companies
Parallel Flange Sections have multiple advantages over conventional sections
Higher product flexibility - Wide range of width, flange thickness and web thickness combinations for any nominal depth
Mechanically more efficient - Higher bending strength for beams and higher axial load carrying capacity for columns
Structurally more stable -Greater radius of gyration lowers slenderness ratio and allows withstanding of buckling to a greater extent
Lighter structures - Higher strength to-weight ratio leads to lighter structures and foundations
Parallel Flange Sections have multiple advantages over conventional sections
Easier fabrication - Easier connection of joints by direct bolting on flanges without using tapered washes and easier but Welding of plate at edge of flange
Economical - - Substantial saving in material weight when used as compression member (columns) or flexural member (beams)
| Type | Size | Weight Kg/m | Area (Sq. cm) | Radius of Gyration(cm) |
|---|---|---|---|---|
| ISMB | 600x210 | 123 | 156 | 4.12 |
| NPB | 600x210 | 122.45 | 156 | 4.66 |
| WPB | 400x300 | 124.8 | 159 | 7.34 |
| Section | Mass (kg/m) | Section Modulus about major axis(cm3) |
|---|---|---|
| MB 400 | 61.6 | 1022.9 |
| NPB 400x180x57.38 | 57.38 | 1022.3 |
NEX Parallel Flange Sections are more efficient and provide more economic designs.
e.g. UTILISATION RATIO of sections
| Max utilisation ratio of the Conventional sections used: | Max utilisation ratio of the Parallel Flange Sections used: |
|---|---|
| Top Beams: MB250 - 0.328 | Top Beams: NPB250x30. I I - 0.371 |
| Mid Beams: MB350 - 0.894 | Mid Beams: NPB300x49.32 - 0.821 |
| Lower Beams: MB450 - 0.892 | Lower Beams: NPB400x66.3 I - 0.81 |
| Columns: MB600 - 0.916 | Columns: WPB240x83.2 - 0.874 |
Columns: WPB240x83.2 - 0.874
- Dead Load of 400 kg/m on floor beams & I00 kg/m on roof beams.
- Live Load of I 000 kg/m2 on lower level floor beams & 600 kg/m2 on mid level floor and 200 kg/m on roof beams.
- Wind Load of 300 kg/m on each column in both X & Z direction.
Comparison of the weight of structure, for the above example, is given below:
| Conventional Section | Weight in Tons |
|---|---|
| MB 600 x 123.0 | 5.79 |
| MB 450 x 72.4 | 1.735 |
| MB 350 x 52.4 | 1 . 2 54 |
| MB 250 x 37.3 | 1 . 1 25 |
| Total | 9.904 |
| Parallel Flange Section | Weight in Tons |
|---|---|
| WPB 240 x 83.20 | 3.985 |
| NPB 400 x 66.31 | 1.588 |
| NPB 300 x 49.32 | 1.181 |
| NPB 250 x 30. 11 | 0.906 |
| Total | 7.66 1 |
Greater efficiency of the Parallel Flange Sections is primarily due to better distribution of material across the section. This leads to greater moment of inertia, section modulus and radius of gyration. Consequently PFS has more load carrying capacity.
ADVANTAGES OF USING HIGHTENSILE SECTIONS
- Lighter super structure
- Upfront savings in cost due to lesser weight of steel
- Reduced depth of beams
- Greater load carrying capacity for same depth of columns used in mild steel
- Lower transportation, handling and erection costs due to lower weight of structure
Dimensions (mm)
| Sections | Mass (Kg/m) | Sectional Area (cm') | D (Depth) | B (Width) | t (Web thick) | T (Flange thick) | Flange slope, a deg | R, (Root Radius) | R2 |
|---|---|---|---|---|---|---|---|---|---|
| WPB 160 | 30.44 | 38.78 | 152 | 160 | 6 | 9 | - | 15 | - |
| WPB 160 | 23.84 | 30.37 | 148 | 160 | 4.5 | 7 | - | 15 | - |
Sectional Properties
| Moment of Inertia | Radius of Gyration | Section Modulus | Plastic Section Modulus | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Sections | Mass (Kg/m) | 1x (cm4) | ly (cm4) | Rx (cm) | Ry (cm) | Zx (cm3) | Zy (cm3) | Zpx (cm3) | Zpy (cm3) |
| WPB I 60x30.44 | 30.44 | 1672.97 | 61 5.57 | 6.57 | 3.98 | 220.1 3 | 76.95 | 245.1 7 | 11 7.64 |
| WPB I 60x23.84 | 23.84 | 1 282.88 | 478.73 | 6.50 | 3.97 | 173.36 | 59.84 | 190.43 | 91.37 |
Advantages of using NEX (WPB 160) as electric pole
- Comparatively lighter steel member with higher section modulus
- Saving in cost due to lower weight of steel member
- Easier connection due to parallel flanges
- Lower transportation, handling and erection cost owing to lighter members
- Superior finish from state-of the-art mills
- Supply in specific lengths as per requirement
- Alternative of existing sections viz., HB I 50*34.6kg/m, SC I 50*37. I kg/m, JI I 6*23kg/m etc with cost saving.
Steel conforming to IS: 2062-2011, Hot Rolled Section as per 12778:2004 & tolerances as per IS 12779: 1989 ( 1995)
# WPB 160 is available in 4 sections of 23.84kg/m, 30.44kg/m, 42.59kg/m and 76. I 9kg/m in Grade E2S0BR and above.WPB 160 in 23.84 kg/m & 30.44 kg/m have been adopted as Electric Poles by some of the State Government discoms for implementation of their DDUGJY, SAUBHAGYA & IPDS schemes .
Application of NEX
- Flyovers
- Stadiums
- Metro Rails/ Indian Railways
- Foot Over Bridges
- Multi-level Car Parks
- Industrial Buildings
- Raw Material Handling Plants
- Residential Complexes
- Commercial Complexes
- Power Plants
- Ports/Offshore Structures
- Oil Refineries/Petrochemical Plants
- Electric Poles (Masts)
- Trailer and Truck Bed Frames
NEX PFS available with SAIL
| Narrow Flange Parallel Beams |
|---|
| NPB 100 X 55 X 8. 1 0 |
| NPB 200 X I 00 X 22.36 |
| NPB 200 X I 00 X 25.09 |
| NPB 250 X 125 X 30.11 |
| NPB 300 X 150 X 36.52 |
| NPB 300 X 150 X 42.24 |
| NPB 300 X 150 X 49.32 |
| NPB 400 X 180 X 57.38 |
| NPB 400 X 180 X 66.3 |
| NPB 400 X 180 X 75.66 |
| IPE 400R [ 400X 180 X 84.00] |
| NPB 450 X 190 X 67.1 5 |
| NPB 450 X 190 X 77.57 |
| NPB 450 X 190 X 92.36 |
| IPE 450R [450 X 190 X 95.20] |
| IPE 450V [450 X 190 X 104.00] |
| NPB 500 X 200 X 79.36 |
| NPB 500 X 200 X 90.68 |
| Narrow Flange Parallel Beams |
|---|
| NPB 600 X 220 X 122.45 |
| NPB 600 X 220 X 154.46 |
| IPE 600V[600 X 220 X 1 84.00] |
| NPB 750 X 270 X 174.54 |
| NPB 750 X 270 X 202.48 |
| IPE 750 [750 X 270 X 173.00] |
| IPE 750 [750 X 270 X 185.00] |
| IPE 750 [750 X 270 X 196.00] |
| Wide Flange Parallel Beams |
|---|
| WPB 160 X 160 X 23.84 |
| WPB 160 X 160 X 30.44 |
| WPB 160 X 160 X 42.59 |
| WPB 160 X 160 X 76.1 9 |
| WPB 240 X 240 X 47.39 |
| WPB 240 X 240 X 60.32 |
| WPB 240 X 240 X 83.20 |
| WPB 240 X 240 X 1 56.67 |
| WPB 300 X 300 X 117.04 |
