**Original Version**

Rule 48.2

**48.2
Structural Steel**

**Steel structures, steel
structural members and their connections**, shall be designed and constructed so
that the structures and parts thereof will not fail or be seriously distorted
at any load less than the maximum working loads developed under the
construction arrangement with loadings as specified in Rule 43) multiplied by
the safety factors specified in Rule 44.

The safety factors specified in Rule 44 shall be applied as follows to structural steel:

**Tensions and Bending:**
The yield point, 33,000 pounds per square inch, shall be divided by the safety
factor to determine the maximum allowable working stress.

**Compression:** The maximum
allowable working stress shall be calculated by the following formula:

where S_{max} = maximum allowable working stress, lbs per sq
in.

f_{s} = safety factor specified in Rule 44

YP = yield point of the steel, 33,000 lbs per sq in.

l = unsupported length of member, inches

r = radius of gyration of member, inches

**Shear:** The ultimate
tensile strength, 60,000 pounds per square inch, shall be multiplied by 2/3 and
divided by the safety factor specified in Rule 44 to determine the maximum
allowable working stress.

Where the figures given are used, structural steel shall conform to Standards Specifications A7-39 of American Society for Testing Materials for carbon steel of structural quality. Other values may be used for steel of other strength provided the yield point and ultimate tensile strength are determined by test.

**Strikeout and Underline Version**

Rule 48.2

**48.2
Structural ****Steel****
Material (other than wood)**

**Steel structures,
steel**** structural members and their connections**, shall be designed and
constructed so that the structures and parts thereof will not fail or be
seriously distorted at any load less than the maximum working loads developed
under the construction arrangement with loadings as specified in Rule 43)
multiplied by the safety factors specified in Rule 44.

The safety factors specified in Rule 44 shall be applied as follows to structural steel:

**Tensions and Bending:**
The yield point, 33,000 pounds per square inch, shall be divided by the safety
factor to determine the maximum allowable working stress.

**Compression: **The maximum
allowable working stress shall be calculated by the following formula:

where S_{max} = maximum allowable working stress, lbs per sq
in.

f_{s} = safety factor specified in Rule 44

YP = yield point of the steel, 33,000 lbs per sq in.

l = unsupported length of member, inches

r = radius of gyration of member, inches

**Shear:** The ultimate
tensile strength, 60,000 pounds per square inch, shall be multiplied by 2/3 and
divided by the safety factor specified in Rule 44 to determine the maximum
allowable working stress.

Where the figures given are used, structural steel shall conform to Standards Specifications A7-39 of American Society for Testing Materials for carbon steel of structural quality. Other values may be used for steel of other strength provided the yield point and ultimate tensile strength are determined by test.

**For other structural
materials (other than concrete)**, the safety factor specified in Rule 44 shall
be applied as follows:

**Tension:** The yield
strength of the material used shall be divided by the safety factor specified
in Rule 44 to determine the maximum allowable working stress.

**Compression:** The
ultimate compressive strength of the material used be divided by the safety
factor specified in Rule 44 to obtain the allowable working stress. The ultimate compressive strength shall be
determined by suitable formulas for material used, considering yield strength
of the material, modulus of elasticity, slenderness ratio and eccentricity of
connection. In no case shall the
ultimate compressive stress be greater than the yield strength of the material.

**Shear:**** ** The ultimate shear strength of the material
used be divided by the safety factor specified in Rule 44 to determine the
maximum allowable working stress.

**Strikeout and Underline Version**

Rule 48.2

**48.2
Structural
Material (other than wood)**

Structural members and their connections, shall be designed and constructed so that the structures and parts thereof will not fail or be seriously distorted at any load less than the maximum working loads developed under the construction arrangement with loadings as specified in Rule 43) multiplied by the safety factors specified in Rule 44.

The safety factors specified in Rule 44 shall be applied as follows to structural steel:

**Tensions and Bending:**
The yield point, 33,000 pounds per square inch, shall be divided by the safety
factor to determine the maximum allowable working stress.

**Compression:** The maximum
allowable working stress shall be calculated by the following formula:

where S_{max} = maximum allowable working stress, lbs per sq
in.

f_{s} = safety factor specified in Rule 44

YP = yield point of the steel, 33,000 lbs per sq in.

l = unsupported length of member, inches

r = radius of gyration of member, inches

**Shear: **The ultimate
tensile strength, 60,000 pounds per square inch, shall be multiplied by 2/3 and
divided by the safety factor specified in Rule 44 to determine the maximum
allowable working stress.

Where the figures given are used, structural steel shall conform to Standards Specifications A7-39 of American Society for Testing Materials for carbon steel of structural quality. Other values may be used for steel of other strength provided the yield point and ultimate tensile strength are determined by test.

**For other structural
materials (other than concrete)**, the safety factor specified in Rule 44 shall
be applied as follows:

**Tension:** The yield
strength of the material used shall be divided by the safety factor specified
in
Rule 44 to determine the maximum allowable working stress.

**Compression:** The
ultimate compressive strength of the material used be divided by the safety
factor specified in Rule 44 to obtain the allowable working stress. The ultimate compressive strength shall be
determined by suitable formulas for material used, considering yield strength
of the material, modulus of elasticity, slenderness ratio and eccentricity of
connection. In no case shall the
ultimate compressive stress be greater than the yield strength of the material.

**Shear:**** ** The ultimate shear strength of the material
used be divided by the safety factor specified in
Rule 44 to determine the
maximum allowable working stress.