131. The rules for beams fixed at one end and loaded at the other are precisely the same as those for beams supported at both ends, except that a different constant number must be used; viz. the constant d in the following Table, or the constant number c for beams supported at both ends must be divided by 4. If the weight be uniformly diffused over the length, the beam will bear double the weight that would break it when applied in the middle.

132. Table XV. - Experiments On The Strength Of Beams Supported At One End

Kind of Wood.

Specific gravity.

Length in feet.

Breadth in inches.

Depth in inches.

Deflection at the time of fracture in inches.

Weight that broke the piece in lbs.

Values of constant d.

Experimentalist.

English oak...........

.922

4

2

2

..

266

133

Beaufoy.

" ......

..

4

2

2

..

210

105

"

Dantzic oak...........

.854

4

2

2

..

196

98

"

Beech...................

.700

3

2

2

11

401

150

Barlow.

" .............

.740

2

1

2

5

352

176

"

Ash ...................

.658

3

2

2

11 1/2

436

163

"

" ...................

.730

2

1

2

6

321

160

"

" green ...........

.858

5

2

2

16

239

149

Peake and Barrallier.

Teak, old, dry ..

.606

5

2

2

12 1/2

257

161

"

Dantzic fir, wet

.648

5

2

2

12 1/2

157

97

"

Riga fir ...........

.537

4

2

2

..

210

105

Beaufoy.

" dry ...........

.633

5

2

2

14

153

93

Peake and Barrallier.

" dry ............

.636

2

3

3

..

1974

146

Fincham.

Red pine ..............

.589

2

3

3

..

1753

129

"

Virginian yellow pine .. ..

.522

5

2

2

11 3/4

147

92

Peake and Barrallier.

Canadian white pine .. ..

.618

5

2

2

18 3/4

122

76

"

Pitch pine..............

...

4

2

2

...

270

135

Beaufoy.

Larch, dry ............

.526

5

2

2

16 1/4

162

101

Peake and Barrallier.

American spruce

.537

2

3

3

2

1652

122

Fincham.

Kowrie (N. Zea-land) .. ..

.629

2

3

3

...

2044

151

"

Saul (India) .....

.880

...

...

...

...

..

220

Skinner.