TABLE 1 — MATERIAL PROPERTIES
| CHARACTERISTIC | TEST | RESULTS |
| Color | Visual |
Black |
| Hardness | ASTM D2240-84 |
|
| (test averages) | (See Table 4) |
|
| at -30° farenheit | D70.6 |
|
| at 73° farenheit | D63.5 |
|
| at 116° farenheit | D55.1 |
|
| Ultimate Compressive Strength | ASTM D695-91 |
|
| (test averages) | (See Table 5) |
|
| at -30° farenheit | 5857 psi |
|
| at 73° farenheit | 5505 psi |
|
| at 130° farenheit | 5311 psi |
|
| Ultimate Flexural Strength (Yield) | ASTM D790-86 |
|
| (test averages) | (Procedure B) |
|
| at -30° farenheit | 4961 psi |
|
| at 73° farenheit | 4240 psi |
|
| at 130° farenheit | 2641 psi |
|
| Modules of Elasticity | ||
| (Averages based on Flexure) | ||
| at -30° farenheit | 36.6x104 psi |
|
| at 73° farenheit | 28.0x104 psi |
|
| at 130° farenheit | 14.1x104 psi |
| Abreviations: | psi=pounds per square inch |
TABLE 2 — STANDARD BASES
| SMALL BASE | MEDIUM BASE | LARGE BASE | |
| Dimensions (inches) | 9 3/4"x15 3/4" |
12"x12" |
18"x18" |
| Base Area | 154 sq. inches |
144 sq. inches | 324 sq. inches |
| Weight (base only) | 4.3 pounds | 3.7 pounds |
7.8 pounds |
| Abreviations: | psi=pounds per square inch |
TABLE 3 — MAXIMUM ALLOWABLE LOADING BY PIPE HANGER
| DECK INSULATION | STRESS | SMALL BASE | MEDIUM BASE | LARGE BASE |
| Expanded Poltstyrene | 5 psi |
770 pounds |
720 pounds | 1,620 pounds |
| Glass/Mineral Fiber | 5 psi |
770 pounds | 720 pounds | 1,620 pounds |
| Polyisocyanurate | 5 psi |
770 pounds | 720 pounds | 1,620 pounds |
| Extruded Poltstyrene | 6 psi | 924 pounds |
864 pounds | 1,944 pounds |
| Fiber Board | 6 psi | 924 pounds |
864 pounds | 1,944 pounds |
| Perlite | 7.5 psi | 2,695 pounds |
2,520 pounds | 5,670 pounds |
| Cellular Glass | 50 psi |
7,700 pounds | 7,200 pounds | 16,200 pounds |
Please note that the placement of individual bases must be reviewed by a Structural Engineer to ensure that the roof structure is not overloaded.
Based on a factor of safety of 2 against published minimum ultimate values of insulation compression strength (NRCA Commercial Low-Slope Roofing Materials Guide, 1994 Edition). Designer must also ensure adequacy against punching resistance and overall structural integrity of the roof on which the assembly is placed. Resultant stresses from lateral loads on pipes may result in higher stresses in substrate than plain gravity loads. |
TABLE 4 — HARDNESS TEST VALUES
| TEST NUMBER | TEST SPECIMEN TEMPERATURE | ||
| -30°F | 73°F | 130°F | |
| 1 | 70.4 |
63.6 | 55 |
| 2 | 70.8 |
63 | 55.6 |
| 3 | 70.6 | 63.8 |
54.8 |
| Average | 70.6 | 63.5 |
55.1 |
| Abreviations: | °F= degrees Farenheit |
TABLE 5 — ULTIMATE COMPRESSION STRENGTHS
Test Method: ASTM D695-91
| TEST NUMBER | TEST SPECIMEN TEMPERATURE | ||
| -30°F | 73°F | 130°F | |
| 1 | 5,592 psi |
5,524 psi | 5,380 psi |
| 2 | 5,880 psi |
5,548 psi | 5,212 psi |
| 3 | 6,100 psi | 5,444 psi |
5,340 psi |
| Average | 5,857 psi | 5,505 psi |
5,311 psi |
| Abreviations: | psi=pounds per square inch °F= degrees Farenheit |
TABLE 6 — FLEXURAL STRESSES
| # | TEMPERATURE DURING TEST | |||||
-30°F |
73°F | 130°F | ||||
Fb (psi) |
Ex104 (psi) | Fb (psi) | Ex104 (psi) | Fb (psi) | Ex104 (psi) | |
| 1 | 5,210 |
36.2 | 4,485 | 35.2 | 3,031 | 14.8 |
| 2 | 4,608 | 35 |
4,030 | 22.5 | 2,497 | 18.5 |
| 3 | 5,064 | 38.6 |
4,205 | 26.3 | 2,394 | 9.1 |
| Avg | 4,961 | 36.6 |
4,240 | 28 | 2,641 | 14.1 |
| Abreviations: | b: pound #: number °F: degrees Farenheit psi: pounds per square inch Avg: average Failure as no increase in load capacity Fb: Maximum Stress in Extreme Fiber in Bending Fb= 3PmaxL/2bh2 L: span length (16 inches) b: beam width (6 inches) h: beam height (1.25 inches) E: Modules of Elasticity Lease values of tests |
TABLE 7 — ULTIMATE PUNCHING SHEAR RESISTANCE LOADS
(Pounds/Inch Deflection)
| BASE TYPE | TEST # | TEMPERATURE OF TEST SPECIMEN | ||
-30°F |
73°F | 130°F | ||
| Small Base | Posts 1 |
4,980/.20 | 9,910/.23 | 8,560/.6 |
| (15 3/4"x9 3/4") | Pipe Support 2 |
6,180/.30 | 9,850/.21 | 9,640/.6 |
| at -30° farenheit | 3 | 5,270/.23 |
9,870/.22 | 7,740/.6 |
 |
|
|
|
|
| Meduim Base | 1 |
9,980/.43 | 9,000/.63 | 7,630/.10 |
| (12"x12") | 2 |
9,910/.43 | 9,670/.63 | 7,480/.10 |
| at -30° farenheit | 3 | 9,930/.34 |
9,960/.58 | 9,340/.10 |
|
|
|
|
|
| Large Base | 1 | 7,700/.71 |
6,400/1.1 | 4,810/1.0 |
| (18"x18") | 2 |
9,350/.96 | 6,550/.96 | 6,130/1.42 |
| (test averages) | 3 |
8,810/.82 | 7,220/1.38 | 5,580/1.28 |
|
|
|
|
|
| Small Base | Roller 1 | 4,030/.16 |
3,510/.15 | 3,180/.22 |
| (15 3/4"x9 3/4") | Pipe Support 2 | 3,550/.26 |
4,110/.18 | 2,790/.21 |
| 3 | 3,580/.20 | 3,890/.16 | 3,280/.26 | |
|
|
|
|
|
| Small Base | Roller 1 | 3,060/.23 |
3,070/.36 | 2,900/.50 |
| (15 3/4"x9 3/4") | Pipe Support 2 | 3,420/.24 |
3,220/.24 | 2,900/.46 |
| 3 | 2,960/.30 |
2,960/.31 | 3,000/.44 | |
| NOTE: The deflection noted in the values for the roller and beam pipe support are a combination of deflection of the pipe support assembly and the pipe hanger base. |
| Abreviations: | #: Number °F: degrees Farenheit |
TABLE 8 — TYPICAL ROOF LOADS AND RESULTING GRAVITY
(Only Bearing Stresses)
Small Size Portable Pipe Hanger Assembly
Base Dimensions: 9 3/4"x15 3/4"
Base Weight: 4.3 lb each, measured
Frame Weight: 9 lb, assumed
Pipe Hanger Weight: (4 to 6"): 4 lb each
| PIPE SIZE | # OF PIPES | CONTENTS OF PIPE |
SPACING OF PIPE SUPPORTS | ||
| 6 FOOT | 8 FOOT | 10 FOOT | |||
| 4 inch | 2 |
WATER | 115 lb. (0.75 psi) | 147 lb. (0.96 psi) | 177 lb. (1.15 psi) |
| 6 inch | 2 |
WATER | 207.3 lb. (1.35 psi) | 267.3 lb. (1.74 psi) | 327.3 lb. (2.13 psi) |
| Abreviations: | psi=pounds per square inch |
TABLE 9 — TYPICAL ROOF LOADS AND RESULTING GRAVITY
(Only Bearing Stresses)
Medium Size Portable Pipe Hanger Assembly
Base Dimensions: 12"x12"
Base Weight: 8 lb each assumed, 3.71 lb measured, 16 lb per assembly
Frame Weight: 9 lb
Pipe Hanger Weight: (4 to 6"): 4 lb each
| PIPE SIZE | # OF PIPES | CONTENTS OF PIPE |
SPACING OF PIPE SUPPORTS | ||
| 6 FOOT | 8 FOOT | 10 FOOT | |||
| 4 inch | 1 |
GAS | 94 lb. (0.36 psi) | 115 lb. (0.44 psi) | 139 lb. (0.53 psi) |
| WATER | 127 lb. (0.49 psi) | 159 lb. (0.61 psi) | 189 lb. (0.73 psi) | ||
| 2 | GAS | 163 lb. (0.63 psi) | 205 lb. (0.79 psi) | 253 lb. (0.97 psi) | |
| WATER | 229 lb. (0.88 psi) | 293 lb. (1.1psi) | 353 lb. (1.4 psi) | ||
| 3 | GAS | 232 lb. (0.89 psi) | 295 lb. (1.1 psi) | 367 lb. (1.4 psi) | |
| WATER | 331 lb. (1.3 psi) | 427 lb. (1.7 psi) | 519 lb. (2.0 psi) | ||
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| 6 inch | 1 |
GAS | 139 lb. (0.53 psi) | 179 lb. (0.69 psi) | 219 lb. (0.84 psi) |
| WATER | 219 lb. (0.84 psi) | 279 lb. (1.1 psi) | 339 lb. (1.3 psi) | ||
| 2 | GAS | 253 lb. (0.97 psi) | 333 lb. (1.3 psi) | 413 lb. (1.6 psi) | |
| WATER | 413 lb. (1.6 psi) | 533 lb. (2.1 psi) | 653 lb. (2.51 psi) | ||
| 3 | GAS | 376 lb. (1.4 psi) | 487 lb. (1.9 psi) | 607 lb. (2.3 psi) | |
| WATER | 607 lb. (2.33 psi) | 787 lb. (3.0 psi) | 967 lb. (3.7 psi) | ||
| Abreviations: | #: Number lb: pounds psi: pounds per square inch |
TABLE 10 — TYPICAL ROOF LOADS
Large Size Portable Pipe Hanger Assembly
Nominal Base Dimensions: 18"x18" (calculations based on 17"x17")
Base Weight: 13 lb each, 26 per assembly
Frame Weight: 16 lb
Hanger Weight: 4 lb each (4 and 6"); 16 lb each (8"); 20 lb each (est) (10" and 12")
| PIPE SIZE | # OF PIPES | CONTENTS OF PIPE |
SPACING OF PIPE SUPPORTS | ||
| 6 FEET | 8 FEET | 10 FEET | |||
| 4 inch | 1 |
GAS | 111 lb. (0.19 psi) | 132 lb. (0.23 psi) | 156 lb. (0.27 psi) |
| WATER | 144 lb. (0.25 psi) | 176 lb. (0.31 psi) | 206 lb. (0.36 psi) | ||
| 2 | GAS | 180 lb. (0.32 psi) | 222 lb. (0.39 psi) | 270 lb. (0.47 psi) | |
| WATER | 264 lb. (0.43 psi) | 310 lb. (0.54 psi) | 376 lb. (0.65 psi) | ||
| 3 | GAS | 249 lb. (0.44 psi) | 312 lb. (0.55 psi) | 384 lb. (0.67 psi) | |
| WATER | 348 lb. (0.61 psi) | 444 lb. (0.78 psi) | 534 lb. (0.94 psi) | ||
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| 6 inch | 1 |
GAS | 156 lb. (0.27 psi) | 196 lb. (0.34 psi) | 236 lb. (0.41 psi) |
| WATER | 236 lb. (0.41 psi) | 296 lb. (0.52 psi) | 356 lb. (0.62 psi) | ||
| 2 | GAS | 270 lb. (0.47 psi) | 350 lb. (0.61 psi) | 430 lb. (0.75 psi) | |
| WATER | 430 lb. (0.75 psi) | 550 lb. (0.96 psi) | 670 lb. (1.2 psi) | ||
| 3 | GAS | 384 lb. (0.67 psi) | 504 lb. (0.88 psi) | 624 lb. (1.1 psi) | |
| WATER | 624 lb. (1.1 psi) | 804 lb. (1.4 psi) | 984 lb. (1.7 psi) | ||
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| 8 inch | 1 | GAS | 228 lb. (0.40 psi) | 288 lb. (0.51 psi) | 348 lb. (0.61 psi) |
| WATER | 358 lb. (0.63 psi) | 458 lb. (0.80 psi) | 558 lb. (0.98 psi) | ||
| 2 | GAS | 414 lb. (0.73 psi) | 534 lb. (0.94 psi) | 654 lb. (1.2 psi) | |
| WATER | 674 lb. (1.2 psi) | 874 lb. (1.5 psi) | 1,074 lb. (1.9 psi) | ||
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| 10 inch | 1 | GAS | 302 lb. (0.53 psi) | 382 lb. (0.67 psi) | 472 lb. (0.83 psi) |
| WATER | 512 lb. (0.90 psi) | 662 lb. (1.2 psi) | 812 lb. (1.4 psi) | ||
| 2 | GAS | 562 lb. (0.99 psi) | 722 lb. (1.3 psi | 902 lb. (1.6 psi) | |
| WATER | 982 lb. (1.7 psi) | 1,282 lb. (2.2 psi) | 1,582 lb. (2.8 psi) | ||
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| 12 inch | 1 | GAS | 362 lb. (0.64 psi) | 462 lb. (0.81 psi) | 562 lb. (0.99 psi) |
| WATER | 652 lb. (1.1 psi) | 852 lb. (1.5 psi) | 1,052 lb. (1.8 psi) | ||
| Abreviations: | psi=pounds per square inch |
TABLE 11 — LOADS: STANDARD GALVANIZED PIPE
| PIPE DIAMETER (NOMINAL) | CONTENTS | WEIGHT (pipe and contents only) |
SPACING OF PIPE SUPPORTS | ||
| 6 FEET | 8 FEET | 10 FEET | |||
| 4 inch | GAS |
10.79 plf | 65 lb | 86 lb | 110 lb |
| WATER | 16.30 plf | 98 lb | 130 lb | 160 lb | |
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| 5 inch | GAS | 14.62 plf | 88 lb | 117 lb | 150 lb |
| WATER | 23.28 plf | 140 lb | 190 lb | 230 lb | |
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| 6 inch | GAS |
18.98 plf | 110 lb | 150 lb | 190 lb |
| WATER | 31.49 plf | 190 lb | 250 lb | 310 lb | |
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| 8 inch | GAS | 28.56 plf | 170 lb | 230 lb | 290 lb |
| WATER | 50.24 plf | 300 lb | 400 lb | 500 lb | |
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| 10 inch | GAS | 40.50 plf | 240 lb | 320 lb | 410 lb |
| WATER | 74.60 plf | 450 lb | 500 lb | 750 lb | |
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| 12 inch | GAS | 49.60 plf | 300 lb | 400 lb | 500 lb |
| WATER | 98.60 plf | 590 lb | 790 lb | 990 lb | |
| Abreviations: | psi=pounds per square inch |
TABLE 12 — ROOF DECK INSULATION COMPRESSION STRENGTH
| INSULATION TYPE | UNIT WEIGHT | COMPRESSIVE STRENGTH |
| Expanded Polystyrene | 1.0 pcf |
10 to 14 psi |
1.25 pcf |
13 to 18 osi | |
1.5 pcf |
15 to 21 psi | |
| 2.0 pcf | 25 to 33 psi |
|
| Extruded Polystyrene | 1.3 to 4.1 pcf | 12 to 60 psi |
| Glass Fiber/Mineral Fiber | 10 to 15 pcf | 10 psi |
| Cellular Glass | 8.5 pcf |
100 psi |
| Fiberboard | — |
12 to 18 psi |
| Perlite | 10 to 13 pcf | 35 to 40 psi |
| Polyisocyanurate | — | 10 to 25 psi |
| Source: National Roofing Contractors Association, Commercial-Low Slope Roofing Materials Guide, 1994 Edition |
| Abreviations: | psi: pounds per square inch pcf: pounds per cubic foot |