Steel Beams

steel beam

Steel Beams are widely used throughout the construction industry when supporting heavy loads is required. Commonly termed an “I” Beam because of its shape, beams provide great load bearing support when used horizontally or standing as columns. Available in two configurations, the most popular being the Wide Flange Steel Beam aka H Beam or W Beam with non-tapered flanges. This beam shape has a wider profile for added horizontal strength, making it ideal for skyscrapers or as a house beam, along with bridge beams, trailers, platforms, etc. Standard American Beams, aka Junior Beams or S Beams, have tapered flanges for added strength when your load is concentrated on the flanges, such as machine bases, hoists, cranes or a trolley beam for your garage.

Metals Depot stocks a wide range of steel beam sizes for thousands of applications. Shop online for standard or cut to size lengths at wholesale steel beam prices. We also offer a selection of Galvanized Steel Beams. Just give us a call if you need something special.

Note: Steel Beams may have areas with minor surface imperfections, rust scale or discoloration due to the nature of the product. This is normal and in no way affects the integrity of the product.

About

SPECIFICATIONS:

ASTM A992/A572-50 (Grade 50)

FINISH:

Mill Finish, slightly grainy

WORKABILITY:

Welding = Excellent
Machining / Grinding = Good
Bending / Forming = Fair
Wear Resistance = Fair
Corrosion Resistance = Poor

MECHANICAL PROPERTIES:

Tensile Strength = 65,000 psi
Yield Point = 50,000 - 65,000 psi
Elongation = 21% in 2"
Shearing Strength = 11,200 psi
Brinell Hardness = 135; Density = .282 lb/in

AVAILABLE LENGTHS:

5ft, 10ft, 20ft, 25ft, or Cut to Size
Stock lengths may vary +/- 1/2"
Cut to Size Lengths +/- 1/8"

HOW TO MEASURE:

Height (A) X Web (B) X Flange Width (C)

About

SPECIFICATIONS:

ASTM A992/A572-50 (Grade 50)

FINISH:

Mill Finish, slightly grainy

WORKABILITY:

Welding = Excellent
Machining / Grinding = Good
Bending / Forming = Fair
Wear Resistance = Fair
Corrosion Resistance = Poor

MECHANICAL PROPERTIES:

Tensile Strength = 65,000 psi
Yield Point = 50,000 - 65,000 psi
Elongation = 21% in 2"
Shearing Strength = 11,200 psi
Brinell Hardness = 135; Density = .282 lb/in

AVAILABLE LENGTHS:

5ft, 10ft, 20ft, 25ft, or Cut to Size
Stock lengths may vary +/- 1/2"
Cut to Size Lengths +/- 1/8"

HOW TO MEASURE:

Height (A) X Web (B) X Flange Width (C)

California Residents Warning!

Product / Size / Weight / Stock

Product / Size / Weight / Stock
Select Size & Quantity to Add to Cart

Stock #

Item Size & Description

Weight / Ft.

Select Size

QTY

Price

Add to Cart

B1357 S 3 x 5.7# (3.00" x .170" x 2.33")
A36/A572-50 Standard Steel I Beam

B1357

S 3 x 5.7# (3.00" x .170" x 2.33")
A36/A572-50 Standard Steel I Beam

5.70 lb/ft

Select a Size 0.00

Weight: 5.70 lb/ft

B1375 S 3 x 7.5# (3.00" x .349" x 2.509")
A36/A572-50 Standard Steel I Beam

B1375

S 3 x 7.5# (3.00" x .349" x 2.509")
A36/A572-50 Standard Steel I Beam

7.50 lb/ft

Select a Size 0.00

Weight: 7.50 lb/ft

B1477 S 4 x 7.7 lb (4.00" x .193" x 2.663")
A36/A572-50 Standard Steel I Beam

B1477

S 4 x 7.7 lb (4.00" x .193" x 2.663")
A36/A572-50 Standard Steel I Beam

7.70 lb/ft

Select a Size 0.00

Weight: 7.70 lb/ft

B1495 S 4 x 9.5 lb (4.00" x .326" x 2.796")
A36/A572-50 Standard Steel I Beam

B1495

S 4 x 9.5 lb (4.00" x .326" x 2.796")
A36/A572-50 Standard Steel I Beam

9.50 lb/ft

Select a Size 0.00

Weight: 9.50 lb/ft

B2413 W 4 x 13 lb (4.16" x .280" x 4.06")
A572/A992 Wide Flange Steel Beam

B2413

W 4 x 13 lb (4.16" x .280" x 4.06")
A572/A992 Wide Flange Steel Beam

13.00 lb/ft

Select a Size 0.00

Weight: 13.00 lb/ft

B1510 S 5 x 10 lb (5.00" x .214" x 3.004")
A36/A572-50 Standard Steel I Beam

B1510

S 5 x 10 lb (5.00" x .214" x 3.004")
A36/A572-50 Standard Steel I Beam

10.00 lb/ft

Select a Size 0.00

Weight: 10.00 lb/ft

B2516 W 5 x 16 lb (5.01" x .240" x 5.00")
A572/A992 Wide Flange Steel Beam

B2516

W 5 x 16 lb (5.01" x .240" x 5.00")
A572/A992 Wide Flange Steel Beam

16.00 lb/ft

Select a Size 0.00

Weight: 16.00 lb/ft

B2519 W 5 x 19 lb (5.15" x .270 x 5.03")
A572/A992 Wide Flange Steel Beam

B2519

W 5 x 19 lb (5.15" x .270 x 5.03")
A572/A992 Wide Flange Steel Beam

19.00 lb/ft

Select a Size 0.00

Weight: 19.00 lb/ft

B1644 M 6 x 4.4 lb (6.00" x .114" x 1.844")
A529-50 Steel Junior Beam

B1644

M 6 x 4.4 lb (6.00" x .114" x 1.844")
A529-50 Steel Junior Beam

4.40 lb/ft

Select a Size 0.00

Weight: 4.40 lb/ft

B269 W 6 x 9 lb (5.90" x .170" x 3.94")
A572/A992 Wide Flange Steel Beam

B269

W 6 x 9 lb (5.90" x .170" x 3.94")
A572/A992 Wide Flange Steel Beam

9.00 lb/ft

Select a Size 0.00

Weight: 9.00 lb/ft

B2612 W 6 x 12 lb (6.03" x .230" x 4.00")
A572/A992 Wide Flange Steel Beam

B2612

W 6 x 12 lb (6.03" x .230" x 4.00")
A572/A992 Wide Flange Steel Beam

12.00 lb/ft

Select a Size 0.00

Weight: 12.00 lb/ft

B16125 S 6 x 12.5 lb (6.00" x .232" x 3.332")
A36/A572-50 Standard Steel I Beam

B16125

S 6 x 12.5 lb (6.00" x .232" x 3.332")
A36/A572-50 Standard Steel I Beam

12.50 lb/ft

Select a Size 0.00

Weight: 12.50 lb/ft

B2615 W 6 x 15 lb (5.99" x .230" x 5.99")
A572/A992 Wide Flange Steel Beam

B2615

W 6 x 15 lb (5.99" x .230" x 5.99")
A572/A992 Wide Flange Steel Beam

15.00 lb/ft

Select a Size 0.00

Weight: 15.00 lb/ft

B161725 S 6 x 17.25 lb (6.00" x .465" x 3.565")
A36/A572-50 Standard Steel I Beam

B161725

S 6 x 17.25 lb (6.00" x .465" x 3.565")
A36/A572-50 Standard Steel I Beam

17.25 lb/ft

Select a Size 0.00

Weight: 17.25 lb/ft

B2620 W 6 x 20 lb (6.20" x .260" x 6.02")
A572/A992 Wide Flange Steel Beam

B2620

W 6 x 20 lb (6.20" x .260" x 6.02")
A572/A992 Wide Flange Steel Beam

20.00 lb/ft

Select a Size 0.00

Weight: 20.00 lb/ft

B2625 W 6 x 25 lb (6.38" x .320" x 6.08")
A572/A992 Wide Flange Steel Beam

B2625

W 6 x 25 lb (6.38" x .320" x 6.08")
A572/A992 Wide Flange Steel Beam

25.00 lb/ft

Select a Size 0.00

Weight: 25.00 lb/ft

B1865 M 8 x 6.5 lb (8.00" x .135" x 2.281")
A529-50 Steel Junior Beam

B1865

M 8 x 6.5 lb (8.00" x .135" x 2.281")
A529-50 Steel Junior Beam

6.50 lb/ft

Select a Size 0.00

Weight: 6.50 lb/ft

B2810 W 8 x 10 lb (7.89" x .170" x 3.94")
A572/A992 Wide Flange Steel Beam

B2810

W 8 x 10 lb (7.89" x .170" x 3.94")
A572/A992 Wide Flange Steel Beam

10.00 lb/ft

Select a Size 0.00

Weight: 10.00 lb/ft

B2813 W 8 x 13 lb (7.99" x .230" x 4.00")
A572/A992 Wide Flange Steel Beam

B2813

W 8 x 13 lb (7.99" x .230" x 4.00")
A572/A992 Wide Flange Steel Beam

13.00 lb/ft

Select a Size 0.00

Weight: 13.00 lb/ft

B2818 W 8 x 18 lb (8.14" x .230" x 5.25")
A572/A992 Wide Flange Steel Beam

B2818

W 8 x 18 lb (8.14" x .230" x 5.25")
A572/A992 Wide Flange Steel Beam

18.00 lb/ft

Select a Size 0.00

Weight: 18.00 lb/ft

B2815 W 8 x 15 lb (8.11" x .245" x 4.02")
A572/A992 Wide Flange Steel Beam

B2815

W 8 x 15 lb (8.11" x .245" x 4.02")
A572/A992 Wide Flange Steel Beam

15.00 lb/ft

Select a Size 0.00

Weight: 15.00 lb/ft

B18184 S 8 x 18.4 lb (8.00" x .271" x 4.001")
A36/A572-50 Standard Steel I Beam

B18184

S 8 x 18.4 lb (8.00" x .271" x 4.001")
A36/A572-50 Standard Steel I Beam

18.40 lb/ft

Select a Size 0.00

Weight: 18.40 lb/ft

B2821 W 8 x 21 lb (8.28" x .250" x 5.27")
A572/A992 Wide Flange Steel Beam

B2821

W 8 x 21 lb (8.28" x .250" x 5.27")
A572/A992 Wide Flange Steel Beam

21.00 lb/ft

Select a Size 0.00

Weight: 21.00 lb/ft

B1823 S 8 x 23 lb (8.00" x .441" x 4.171")
A36/A572-50 Standard Steel I Beam

B1823

S 8 x 23 lb (8.00" x .441" x 4.171")
A36/A572-50 Standard Steel I Beam

23.00 lb/ft

Select a Size 0.00

Weight: 23.00 lb/ft

B2824 W 8 x 24 lb (7.93" x .245" x 6.495")
A572/A992 Wide Flange Steel Beam

B2824

W 8 x 24 lb (7.93" x .245" x 6.495")
A572/A992 Wide Flange Steel Beam

24.00 lb/ft

Select a Size 0.00

Weight: 24.00 lb/ft

B2828 W 8 x 28 lb (8.06" x .285" x 6.54")
A572/A992 Wide Flange Steel Beam

B2828

W 8 x 28 lb (8.06" x .285" x 6.54")
A572/A992 Wide Flange Steel Beam

28.00 lb/ft

Select a Size 0.00

Weight: 28.00 lb/ft

B2831 W 8 x 31 lb (8.00" x .285" x 8.00")
A572/A992 Wide Flange Steel Beam

B2831

W 8 x 31 lb (8.00" x .285" x 8.00")
A572/A992 Wide Flange Steel Beam

31.00 lb/ft

Select a Size 0.00

Weight: 31.00 lb/ft

B2835 W 8 x 35 lb (8.12" x .310" x 8.02")
A572/A992 Wide Flange Steel Beam

B2835

W 8 x 35 lb (8.12" x .310" x 8.02")
A572/A992 Wide Flange Steel Beam

35.00 lb/ft

Select a Size 0.00

Weight: 35.00 lb/ft

B2840 W 8 x 40 lb (8.25" x .360" x 8.07")
A572/A992 Wide Flange Steel Beam

B2840

W 8 x 40 lb (8.25" x .360" x 8.07")
A572/A992 Wide Flange Steel Beam

40.00 lb/ft

Select a Size 0.00

Weight: 40.00 lb/ft

B2848 W 8 x 48 lb (8.50" x .400" x 8.11")
A572/A992 Wide Flange Steel Beam

B2848

W 8 x 48 lb (8.50" x .400" x 8.11")
A572/A992 Wide Flange Steel Beam

48.00 lb/ft

Select a Size 0.00

Weight: 48.00 lb/ft

B2858 W 8 x 58 lb (8.75" x .510" x 8.22")
A572/A992 Wide Flange Steel Beam

B2858

W 8 x 58 lb (8.75" x .510" x 8.22")
A572/A992 Wide Flange Steel Beam

58.00 lb/ft

Select a Size 0.00

Weight: 58.00 lb/ft

B21012 W 10 x 12 lb (9.87" x .190" x 3.96")
A572/A992 Wide Flange Steel Beam

B21012

W 10 x 12 lb (9.87" x .190" x 3.96")
A572/A992 Wide Flange Steel Beam

12.00 lb/ft

Select a Size 0.00

Weight: 12.00 lb/ft

B21015 W 10 x 15 lb (9.99" x .230" x 4.00")
A572/A992 Wide Flange Steel Beam

B21015

W 10 x 15 lb (9.99" x .230" x 4.00")
A572/A992 Wide Flange Steel Beam

15.00 lb/ft

Select a Size 0.00

Weight: 15.00 lb/ft

B21019 W 10 x 19 lb (10.24" x .250" x 4.02")
A572/A992 Wide Flange Steel Beam

B21019

W 10 x 19 lb (10.24" x .250" x 4.02")
A572/A992 Wide Flange Steel Beam

19.00 lb/ft

Select a Size 0.00

Weight: 19.00 lb/ft

B21022 W 10 x 22 lb (10.17" x .240" x 5.75")
A572/A992 Wide Flange Steel Beam

B21022

W 10 x 22 lb (10.17" x .240" x 5.75")
A572/A992 Wide Flange Steel Beam

22.00 lb/ft

Select a Size 0.00

Weight: 22.00 lb/ft

B110254 S 10 x 25.4 lb (10.00" x .311" x 4.661")
A36/A572-50 Standard Steel I Beam

B110254

S 10 x 25.4 lb (10.00" x .311" x 4.661")
A36/A572-50 Standard Steel I Beam

25.40 lb/ft

Select a Size 0.00

Weight: 25.40 lb/ft

B21026 W 10 x 26 lb (10.33" x .260" x 5.77")
A572/A992 Wide Flange Steel Beam

B21026

W 10 x 26 lb (10.33" x .260" x 5.77")
A572/A992 Wide Flange Steel Beam

26.00 lb/ft

Select a Size 0.00

Weight: 26.00 lb/ft

B21030 W 10 x 30 lb (10.47" x .300" x 5.81")
A572/A992 Wide Flange Steel Beam

B21030

W 10 x 30 lb (10.47" x .300" x 5.81")
A572/A992 Wide Flange Steel Beam

30.00 lb/ft

Select a Size 0.00

Weight: 30.00 lb/ft

B21033 W 10 x 33 lb (9.73" x .290" x 7.96")
A572/A992 Wide Flange Steel Beam

B21033

W 10 x 33 lb (9.73" x .290" x 7.96")
A572/A992 Wide Flange Steel Beam

33.00 lb/ft

Select a Size 0.00

Weight: 33.00 lb/ft

B21045 W 10 x 45 lb (10.10" x .350" x 8.02")
A572/A992 Wide Flange Steel Beam

B21045

W 10 x 45 lb (10.10" x .350" x 8.02")
A572/A992 Wide Flange Steel Beam

45.00 lb/ft

Select a Size 0.00

Weight: 45.00 lb/ft

B21214 W 12 x 14 lb (11.91" x .200" x 3.97")
A572/A992 Wide Flange Steel Beam

B21214

W 12 x 14 lb (11.91" x .200" x 3.97")
A572/A992 Wide Flange Steel Beam

14.00 lb/ft

Select a Size 0.00

Weight: 14.00 lb/ft

B21216 W 12 x 16 lb (11.99" x .200" x 3.97")
A572/A992 Wide Flange Steel Beam

B21216

W 12 x 16 lb (11.99" x .200" x 3.97")
A572/A992 Wide Flange Steel Beam

16.00 lb/ft

Select a Size 0.00

Weight: 16.00 lb/ft

B21219 W 12 x 19 lb (12.16" x .235" x 4.01")
A572/A992 Wide Flange Steel Beam

B21219

W 12 x 19 lb (12.16" x .235" x 4.01")
A572/A992 Wide Flange Steel Beam

19.00 lb/ft

Select a Size 0.00

Weight: 19.00 lb/ft

B21222 W 12 x 22 lb (12.31" x .260" x 4.03")
A572/A992 Wide Flange Steel Beam

B21222

W 12 x 22 lb (12.31" x .260" x 4.03")
A572/A992 Wide Flange Steel Beam

22.00 lb/ft

Select a Size 0.00

Weight: 22.00 lb/ft

B21226 W 12 x 26 lb (12.22" x .230" x 6.49")
A572/A992 Wide Flange Steel Beam

B21226

W 12 x 26 lb (12.22" x .230" x 6.49")
A572/A992 Wide Flange Steel Beam

26.00 lb/ft

Select a Size 0.00

Weight: 26.00 lb/ft

B21230 W 12 x 30 lb (12.34" x .260" x 6.52")
A572/A992 Wide Flange Steel Beam

B21230

W 12 x 30 lb (12.34" x .260" x 6.52")
A572/A992 Wide Flange Steel Beam

30.00 lb/ft

Select a Size 0.00

Weight: 30.00 lb/ft

B112318 S 12 x 31.8 lb (12.00" x .350" x 5.00")
A36/A572-50 Standard Steel I Beam

B112318

S 12 x 31.8 lb (12.00" x .350" x 5.00")
A36/A572-50 Standard Steel I Beam

31.80 lb/ft

Select a Size 0.00

Weight: 31.80 lb/ft

B21235 W 12 x 35 lb (12.50" x .300" x 6.56")
A572/A992 Wide Flange Steel Beam

B21235

W 12 x 35 lb (12.50" x .300" x 6.56")
A572/A992 Wide Flange Steel Beam

35.00 lb/ft

Select a Size 0.00

Weight: 35.00 lb/ft

B21240 W 12 x 40 lb (11.94" x .295" x 8.01")
A572/A992 Wide Flange Steel Beam

B21240

W 12 x 40 lb (11.94" x .295" x 8.01")
A572/A992 Wide Flange Steel Beam

40.00 lb/ft

Select a Size 0.00

Weight: 40.00 lb/ft

B21250 W 12 x 50 lb (12.19" x .370" x 8.08")
A572/A992 Wide Flange Steel Beam

B21250

W 12 x 50 lb (12.19" x .370" x 8.08")
A572/A992 Wide Flange Steel Beam

50.00 lb/ft

Select a Size 0.00

Weight: 50.00 lb/ft

B21265 W 12 x 65 lb (12.12" x .390" x 12.00")
A572/A992 Wide Flange Steel Beam

B21265

W 12 x 65 lb (12.12" x .390" x 12.00")
A572/A992 Wide Flange Steel Beam

65.00 lb/ft

Select a Size 0.00

Weight: 65.00 lb/ft

B21422 W 14 x 22 lb (13.74" x .230" x 5.00")
A572/A992 Wide Flange Steel Beam

B21422

W 14 x 22 lb (13.74" x .230" x 5.00")
A572/A992 Wide Flange Steel Beam

22.00 lb/ft

Select a Size 0.00

Weight: 22.00 lb/ft

B21426 W 14 x 26 lb (13.91" x .255" x 5.03")
A572/A992 Wide Flange Steel Beam

B21426

W 14 x 26 lb (13.91" x .255" x 5.03")
A572/A992 Wide Flange Steel Beam

26.00 lb/ft

Select a Size 0.00

Weight: 26.00 lb/ft

B21430 W 14 x 30 lb (13.84" x .270" x 6.73")
A572/A992 Wide Flange Steel Beam

B21430

W 14 x 30 lb (13.84" x .270" x 6.73")
A572/A992 Wide Flange Steel Beam

30.00 lb/ft

Select a Size 0.00

Weight: 30.00 lb/ft

B21434 W 14 x 34 lb (13.98" x .285" x 6.75")
A572/A992 Wide Flange Steel Beam

B21434

W 14 x 34 lb (13.98" x .285" x 6.75")
A572/A992 Wide Flange Steel Beam

34.00 lb/ft

Select a Size 0.00

Weight: 34.00 lb/ft

B21443 W 14 x 43 lb (13.66" x .305" x 7.99")
A572/A992 Wide Flange Steel Beam

B21443

W 14 x 43 lb (13.66" x .305" x 7.99")
A572/A992 Wide Flange Steel Beam

43.00 lb/ft

Select a Size 0.00

Weight: 43.00 lb/ft

B21626 W 16 x 26 lb (15.69" x .250" x 5.50")
A572/A992 Wide Flange Steel Beam

B21626

W 16 x 26 lb (15.69" x .250" x 5.50")
A572/A992 Wide Flange Steel Beam

26.00 lb/ft

Select a Size 0.00

Weight: 26.00 lb/ft

B21631 W 16 x 31 lb (15.88" x .275" x 5.53")
A572/A992 Wide Flange Steel Beam

B21631

W 16 x 31 lb (15.88" x .275" x 5.53")
A572/A992 Wide Flange Steel Beam

31.00 lb/ft

Select a Size 0.00

Weight: 31.00 lb/ft

B21636 W 16 x 36 lb (15.86" x .295" x 6.985")
A572/A992 Wide Flange Steel Beam

B21636

W 16 x 36 lb (15.86" x .295" x 6.985")
A572/A992 Wide Flange Steel Beam

36.00 lb/ft

Select a Size 0.00

Weight: 36.00 lb/ft

B21640 W 16 x 40 lb (16.01" x .305" x 6.99")
A572/A992 Wide Flange Steel Beam

B21640

W 16 x 40 lb (16.01" x .305" x 6.99")
A572/A992 Wide Flange Steel Beam

40.00 lb/ft

Select a Size 0.00

Weight: 40.00 lb/ft

B21650 W 16 x 50 lb (16.26" x .380" x 7.07")
A572/A992 Wide Flange Steel Beam

B21650

W 16 x 50 lb (16.26" x .380" x 7.07")
A572/A992 Wide Flange Steel Beam

50.00 lb/ft

Select a Size 0.00

Weight: 50.00 lb/ft

B21667 W 16 x 67 lb (16.33" x .395" x 10.24")
A572/A992 Wide Flange Steel Beam

B21667

W 16 x 67 lb (16.33" x .395" x 10.24")
A572/A992 Wide Flange Steel Beam

67.00 lb/ft

Select a Size 0.00

Weight: 67.00 lb/ft

B21835 W 18 x 35 lb (17.70" x .300" x 6.00")
A572/A992 Wide Flange Steel Beam

B21835

W 18 x 35 lb (17.70" x .300" x 6.00")
A572/A992 Wide Flange Steel Beam

35.00 lb/ft

Select a Size 0.00

Weight: 35.00 lb/ft

B21840 W 18 x 40 lb (17.90" x .315" x 6.02")
A572/A992 Wide Flange Steel Beam

B21840

W 18 x 40 lb (17.90" x .315" x 6.02")
A572/A992 Wide Flange Steel Beam

40.00 lb/ft

Select a Size 0.00

Weight: 40.00 lb/ft

B21850 W 18 x 50 lb (17.99" x .355" x 7.50")
A572/A992 Wide Flange Steel Beam

B21850

W 18 x 50 lb (17.99" x .355" x 7.50")
A572/A992 Wide Flange Steel Beam

50.00 lb/ft

Select a Size 0.00

Weight: 50.00 lb/ft

B21865 W 18 x 65 lb (18.35" x .450" x 7.59")
A572/A992 Wide Flange Steel Beam

B21865

W 18 x 65 lb (18.35" x .450" x 7.59")
A572/A992 Wide Flange Steel Beam

65.00 lb/ft

Select a Size 0.00

Weight: 65.00 lb/ft

B22144 W 21 x 44 lb (20.66" x .350" x 6.50")
A572/A992 Wide Flange Steel Beam

B22144

W 21 x 44 lb (20.66" x .350" x 6.50")
A572/A992 Wide Flange Steel Beam

44.00 lb/ft

Select a Size 0.00

Weight: 44.00 lb/ft

B22455 W 24 x 55 lb (23.57" x .395" x 7.01")
A572/A992 Wide Flange Steel Beam

B22455

W 24 x 55 lb (23.57" x .395" x 7.01")
A572/A992 Wide Flange Steel Beam

55.00 lb/ft

Select a Size 0.00

Weight: 55.00 lb/ft