This section is from the book "Cyclopedia Of Architecture, Carpentry, And Building", by James C. et al. Also available from Amazon: Cyclopedia Of Architecture, Carpentry And Building.
YOUNGLOVE BUILDING, EUCLID AVENUE, CLEVELAND, OHIO.
Watterson & Schneider, Architects, Cleveland, Ohio.
3. Apply formula f = My/I.
Substituting the values obtained above we find the value of f.
Fiq. 87 CAST IRON SPOOL SEPARATORS.
A more direct method would be to find the value of S (see Cambria) and dividing M by S which would give the required fibre stress.
Fig 88 STANDARD CAST IRON SEPARATOR WITH ONE BOLT.
To find what load, uniformly distributed, will be carried by a given beam at a given fibre stress. Data required:
1. Length of span, center of bearings.
2. Allowed fibre stress.
3. Size and weight per foot of beam.
1. Find from the tables the moment of inertia of the given beam.
2. Find the value of the beam in bending-moment, inch-pounds, from the formula M =fI/y
3. Find the value of the beam in bending-moment footpounds by dividing the result obtained under operation 2 by 12.
4. Find the value of W in the formula
W = 8M/l, in which W = the total load in pounds uniformly distributed which the beam will support:
M = the bending moment in foot-pounds; and l = length of span in feet.
Fiq. 89 STANDARD CA5T IRON SEPARATOR WITH TWO BOLTS.
To find the size of beam required to carry a system of known loads at a given fibre stress. Data required:
1. Length of span, center to center.
2. Allowable fibre stress.
3. The amount and character of load on the beam. Operations:
1. Figure the bending moment in inch pounds due to all the concentrated loads, and the uniform load.
2. Divide the bending moment in inch pounds by the specified fibre stress, and the result will be the required section modulus, S.
3. Select from Cambria a beam having the required value of S.
Note. Due attention in selecting the beam must be given to lateral and vertical deflection as previously noted, or to a proper reduction of the specified fibre stress to allow for these considerations.