| W/D Calculations |
CLASSIC 5 LD FIREPROOFING |
Fireproofing Products by The Schundler Company |
SCHUNDLER CLASSIC 5 LD CEMENTITIOUS FIREPROOFING has to be sprayed in accordance with U.L. designs. Some of the most commonly used column sizes are given our U.L. Design No. Y726, but not all columns.
When a column is being used that is not listed in the U.L. design, it is important that the right thickness of fireproofing is applied. In the U.L. design, there is a formula that can be used to determine the required thickness of fireproofing for specific columns and for specific fire ratings.
The problem is that often designers, contractors, and code officials can't calculate the required thickness because no one knows the W/D ratio of different columns, or they don't know the "Heated perimeter of a steel column in inches."
This page has been designed to help those trying to make these calculations. By using the following formula and W/D ratios, the required thickness of sprayed-on SCHUNDLER CLASSIC 5 LD CEMENTITIOUS FIREPROOFING Fireproofing can be determined.
The formula given is:
(STILL UNDER CONSTRUCTION)
Schundler Classic 5 LD is manufactured by:
The Schundler Company
www.schundler.com
732-287-2244
732-287-4185 (fax)
The Schundler Company is one of the oldest perlite and vermiculite processing companies in America. The company was founded The Schundler Company in New Jersey in 1951.
The Schundler Company has been providing perlite and vermiculite aggregates to the plastering and fireproofing industries since it started, and has been manufacturing a variety of fireproofing products for over ten years.
Please visit our web site at www.schundler.com to read more about the company and its products.
The Schundler Company
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h = R_____________
1.05 (W/D) + 0.61
Where:
h = Spray-Applied Fire Resistive Materials thickness in the range 0.25-3.875 in.
R = Fire resistance rating in hours (1 - 4 h)
D = Heated perimeter of steel column in inches
W = Weight of steel column in lbs per foot
W/D = 0.33 to 6.62
COLUMN Member
Designation
(in x lb/ft)Perimeter
(D-Value)
COLUMNW/D
Value
Column
W36x300 138.21 2.17 W36x280 137.65 2.03
W36x260 137.04 1.90
w36X245 136.60 1.79
W36x230 136.16 1.69
W36x210 120.44 1.74
W36x194 119.91 1.62
W36x182 119.51 1.52
W36x170 119.10 1.43
W36x160 118.72 1.35
W36x150 118.35 1.27
W36x135 117.70 1.15
W33x241 130.14 1.85
W33x221 129.53 1.71
W33x201 128.91 1.56
W33x152 111.97 1.36
W33x141 111.53 1.26
W33x130 111.06 1.17
W33x118 110.54 1.07
W30x211 120.75 1.75
W30x191 120.10 1.59
W30x173 119.51 1.45
W30x132 101.57 1.30
W30x124 101.23 1.22
W30x116 100.87 1.15
W30x108 100.47 1.07
W30x99 100.06 0.99
W27x178 110.51 1.61
W27x161 109.94 1.46
W27x146 109.41 1.33
W27x114 93.72 1.22
W27x102 93.21 1.09
W27x94 92.82 1.01
W27x84 92.34 0.91
W24X162 100.41 1.61
W24x146 99.78 1.46
W24x131 99.17 1.32
W24x117 98.62 1.19
W24x104 98.12 1.06
W24x94 83.85 1.12
W24x84 83.34 1.46
W24x76 82.92 0.92
W24x68 82.49 0.82
W24x62 74.87 0.83
W24x55 74.37 0.74
150 Whitman Avenue
PO Box 513
Metuchen, NJ 08840
info@schundler.com
For more information, please call or contact either:
150 Whitman Avenue
Edison, New Jersey 08817
732-287-2244 or www.schundler.com
email: info@schundler.com