AAMA TIR A9-91 ERRATA Page 1

DATE: 10/15/2008 CODE: AAMA TIR A9-91 TITLE: Metal Curtain Wall Fasteners

REVISION #1 The word “end” to be replaced by the word “edge” in Section 7.0 per the below:

7.0 ALLOWABLE BEARING AT BOLT HOLES Minimum Spacing and Minimum Edge Distance

Allowable Bearing at Bolt Holes for Steel On the projected area of fasteners in shear connections with the edge distance in the line of force not less than 1.5 nominal diameter, D, and the distance center to center of fasteners not less than 3D: In standard or short-slotted holes with two or more fasteners in the line of force: Fb = 1.2Fu Where: Fb = Allowable Bearing Stress Fu = Ultimate Tensile Stress

REVISION #2 The equation for “Long Slotted Hole Dimensions in.” in Table 1 of Section 8.0 will be changed from [2 to 2 ½ ] d to [2 ½ d] per the below:

8.0 STANDARD AND SLOTTED BOLT HOLES It is recommended that holes for bolts not exceed the sizes specified in Table 1 for friction connections. Slots longer than these dimensions may be used for expansion or anchor alignment purposes with appropriate engineering analysis or testing.

MAXIMUM SIZE OF BOLT HOLES, INCHES Nominal Bolt

Diameter, d in. Standard Hole Diameter, d in.

Oversized Hole Diameter, d in.

Short-Slotted Hole Dimensions in.

Long-Slotted Hole Dimensions in.

<1/2 d + 1 d + 1 d +

1 by d + 1

d +1

by 2 1 d 32 16 32 4 32 2

≥ 1/2 d + 1 d + 1 d +

1 by d + 1

d +1

by 2 1 d 16 8 16 4 16 2

TABLE 1

AMERICAN ARCHITECTURAL MANUFACTURERS ASSOCIATION AAMA DOCUMENT ERRATA

AAMA TIR A9-91 ERRATA Page 2

REVISION #3 The fourth equation in Table 4 of Section 19.0 will be changed from “TSA (E)” to “TSA (I)” and from “KNMAX” to “ENMAX” per the below:

19.0 FASTENER LOAD TABLES A. Fastener Stress Areas and Tap Drill Sizes

TABLE 4: FASTENER STRESS AREAS – UNIFIED COARSE THREADS (UNC) Nominal Thread

Diameter & Thread Per Inch

D Nominal Thread

Diameter Inch

A (S) Tensile Stress Area

Sq. In.

A (R) Thread Root Area

Sq. In.

TSA (E) TSA (I) External Threads – Class 2A Internal Threads – Class 2B K Basic Minor

Diameter Inch

Tap Drills Thread Stripping

Area Sq. In./Thread Major Diameter Pitch Diameter Minor Diameter Pitch Diameter Commercial Drills

External Internal Max. Min. Max. Min. Min. Max. Min. Max. No./Size Dec. Equivalent

#6-32 0.1380 0.0091 0.0078 0.006 0.009 0.137 0.131 0.117 0.114 0.104 0.114 0.118 0.121 0.0997 36 0.1065 #8-32 0.1640 0.0140 0.0124 0.007 0.010 0.163 0.157 0.143 0.140 0.130 0.139 0.144 0.148 0.1257 29 0.1360

#10-24 0.1900 0.0175 0.0152 0.011 0.017 0.189 0.182 0.162 0.159 0.145 0.156 0.163 0.167 0.1389 25 0.1495 #12-24 0.2160 0.0242 0.0214 0.013 0.019 0.215 0.208 0.188 0.185 0.171 0.181 0.189 0.193 0.1649 16 0.1770 1/4-20 0.2500 0.0318 0.0280 0.018 0.027 0.249 0.241 0.216 0.213 0.196 0.207 0.218 0.222 0.1887 7 0.2010

5/16-18 0.3125 0.0524 0.0469 0.026 0.038 0.311 0.303 0.275 0.271 0.252 0.265 0.276 0.282 0.2443 F 0.2570 3/8-16 0.3750 0.0775 0.0699 0.036 0.052 0.374 0.364 0.333 0.329 0.307 0.321 0.334 0.340 0.2983 5/16 0.3125

7/16-14 0.4375 0.1063 0.0961 0.048 0.070 0.436 0.426 0.390 0.385 0.360 0.376 0.391 0.397 0.3499 U 0.3680 1/2-13 0.5000 0.1419 0.1292 0.060 0.086 0.499 0.488 0.449 0.444 0.417 0.434 0.450 0.457 0.4056 27/64 0.4219

9/16-12 0.5625 0.1819 0.1664 0.074 0.106 0.561 0.550 0.507 0.502 0.472 0.490 0.508 0.515 0.4603 31/64 0.4844 5/8-11 0.6250 0.2260 0.2071 0.091 0.130 0.623 0.611 0.564 0.559 0.527 0.546 0.566 0.573 0.5135 17/32 0.5312 3/4-10 0.7500 0.3345 0.3091 0.121 0.172 0.748 0.735 0.683 0.677 0.642 0.663 0.685 0.693 0.6273 21/32 0.6562

7/8-9 0.8750 0.4617 0.4286 0.159 0.225 0.873 0.859 0.801 0.795 0.755 0.778 0.803 0.811 0.7387 49/64 0.7656 1-8 1.000 0.6057 0.5630 0.207 0.292 0.998 0.983 0.917 0.910 0.865 0.890 0.919 0.928 0.8466 7/8 0.8750

Where:

A(S) =

0.7854 D - 0.9743 2 sq. in.* A(S) = Tensile Stress Area, sq. in. N A(R) = Thread Root Area, sq. in.

D = Nominal Thread Diameter (Basic Major Diameter), in.

A(R) =

0.7854 D - 1.2269 2 sq. in.* N = Number of Threads per inch N

K = Basic Minor Diameter =

D - 1.2269

in. (External Threads) TSA (E) =

3.1416[KNMAX] 1

+ 0.57735 (ESMIN – KNMAX) sq. in./thread N 2N

KNMAX = Maximum minor diameter of internal thread

TSA (I) =

3.1416[DSMIN] 1

+ 0.57735 (DSMIN – ENMAX) sq. in./thread ESMIN = Minimum pitch diameter of external thread 2N DSMIN = Minimum major diameter of external thread

ENMAX = Maximum pitch diameter of internal thread

*These formulas are from the Industrial Fasteners Institute (IFI) and ANSI/ASME B1.1

AAMA TIR A9-91 ERRATA Page 3

REVISION #4 The first note under Table 6 of Section 19.0 will be changed from “A(S) = 0.7858D2*” to “A(S) = 0.7854D2*” per the below:

TABLE 6 SAE Grade 5 Steel for Diameters Up thru 9/16” ASTM A 449 Steel for Diameters 5/8” and Over

Nominal Thread

Diameter & Thread/Inch

D Nominal Thread

Diameter (Inch)

A(S) Tensile Stress Area

(Sq. In.)

A(R) Thread

Root Area (Sq. In.)

Allowable Tension (Pounds)

Allowable Shear Bearing (Pounds)

Minimum Material Thickness to Equal Tensile Capacity of

Fastener (In.)

Single (Pounds)

Double (Pounds)

1/8” St. A36

1/8” Al. 6063-T5 1/8” Al. 6063-T6 A36 6063-T6

#6-32 #8-32

#10-24 #12-24

0.1380 0.1640 0.1900 0.2160

0.0091 0.0140 0.0175 0.0242

0.0078 0.0124 0.0152 0.0214

437 672 840 1162

216 344 421 593

432 687 842 1186

1201 1427 1653 1879

276 328 380 432

414 492 570 648

0.144 0.188 0.195 0.232

0.231 0.308 0.313 0.377

1/4-20 5/16-18 3/8-16

0.2500 0.3125 0.3750

0.0318 0.0524 0.0775

0.0280 0.0469 0.0699

1526 2515 3720

776 1300 1937

1552 2599 3874

2175 2719 3262

500 625 750

750 938 1125

0.261 0.330 0.396

0.422 0.539 0.651

7/16-14 1/2-13

9/16-12

0.4375 0.5000 0.5625

0.1063 0.1419 0.1819

0.0961 0.1292 0.1664

5102 6811 8731

2663 3580 4611

5326 7161 9223

3806 4350 4894

875 1000 1125

1313 1500 1688

0.460 0.532 0.596

0.756 0.878 0.986

5/8-11 3/4-10

7/8-9 1-8

0.6250 0.7500 0.8750 1.0000

0.3068 0.4418 0.6013 0.7854

0.2071 0.3091 0.4286 0.5630

12149 17495 23811 31102

6259 9013 12267 15022

12517 18025 24533 32044

5437 6525 7612 8700

1250 1500 1750 2000

1875 2250 2625 3000

0.732 0.867 0.998 1.129

1.220 1.452 1.674 1.894

SAE GRADE 5 ASTM A 449 For Diameters up thru 9/16”

A(R) =

0.7854 D - 1.2269 2 Ft = 0.40Fu Fu (Min. Ultimate Tensile Strength) 120,000 psi 120,000 psi* N Ft (Allowable Tensile Stress) 48,000 psi 39,600 psi* Allowable tension = 0.40Fu [A(S)] Fv (Allowable Shear Stress) 27,713 psi 20,400 psi*

A(S) =

0.7854 D - 0.9743 2

Fv = 0.40

Fu N √3

Allowable shear (Single) = 0.40

Fu[A(R)] √3 For Diameters 5/8” and over: A(S) = 0.7854D2* * For fasteners 5/8” diameter and greater, values, formulas and procedures used are taken from AISC, “Manual of Steel Construction.” 9th Edition (See page #23 for additional notes.)