One inch thick, supported at both ends.

For other thicknesses, multiply the load in table by the thickness of the beam in inches. For concentrated load at centre divide by two. For permanent loads such as masonry, reduce 10 per cent.

Span In feet.

Depth of Beam in Inches.

4

6

7

8

9

10

12

14

15

16

1 lbs.

lbs.

lbs.

lbs.

lbs.

lbs.

lbs.

lbs.

lbs.

6

588

1,200

1,688

2,188

2,700

3,333

4,800

6,533

7,500

8,533

8

400

900

1,226

1,600

2,025

2,500

3,600

4,900

5,633

6,400

10

820

720

980

1,280

1,620

2,000

2,880

3,920

4,500

5,120

12

• • • •

600

816

1,066

1,350

1,666

2,400

3,266

3,750

4,266

14

• • • •

514

700

914

1,157

1,428

2,056

2,800

3,214

3,656

15

.....

480

658

853

1,080

1,333

1,920

2,613

3,000

3,412

16

• • • •

• • • •

612

800

1,012

1,250

1,800

2,450

2,816

3,200

17

• • • •

• • •

• • •

753

953

1,176

1,694

2,306

2,653

3,012

18

• • •

• • •

• • • •

• •

900

1,111

1,600

2,177

2,500

2,844

20

• • •

• • •

• • •

• • •

• • • •

1,000

1,440

1,960

2,250

2,560

22

• • • •

• • • •

• • •

• • •

• • •

• • •

1,309

1,782

2,045

2,327

28

• • • •

• • •

• • • •

• • •

• • •

• • •

• • •

1,704

1,956

2,226

24

• • • •

• •

• •

• • • •

• • •

• • • •

• • • •

1,633

1,875

2,133

26

• • • •

• •

• • •

......•

• • •

* • •

• • • •

1,568

1.800

2,048

27

• •

....

• •

• • •

• • •

• • •

• • • •

1,451

1,666

1,896

Loads below and to the left of heavy line may crack plastered ceilings.

Tables VI and VII give the safe distributed loads for long leaf yellow pine and spruce beams 1 inch thick, by which the strength of beams of any thickness may be easily obtained.