1B-Review of AISC table 2-5 for plates.

Review of AISC table 2-5 for plates.

   In this post, we will review AISC table 2-5 for plates and explore the differences between the construction manuals CM#14 and CM #15 listed. Later, we will discuss Table 1-7a for both construction manuals CM#14 and CM #15 listed.

Review of AISC table 2-5 for plates-Construction manual-CM#14.

In the next slide, we have AISC table 2-5, with the heading applicable ASTM specifications for plates and bars.

Carbon steel-AISC table 2-5 for plates-CM#14.

From Construction manual CM#14, we have two groups for carbon steel: ASTM A36 and ASTM A 529. The specified Fy for ASTM A 36 has two grades. The first grade is grade 32, for which the yield stress is 32 ksi. Its ultimate stress range is 58 to 80 ksi. This grade is preferred for plates over 8 inches.

 

The second grade is grade 36, for which the yield stress is 36 ksi, and it has a range of 58 to 80 ksi for ultimate stress. Grade 36 is preferred for thicknesses up to 0.75 inches to over 6 to 8 inches. For the ASTM A 529, it has two grades. The first grade is grade 50, for which the yield stress is 50, and it has a range of 70 to 100 ksi for ultimate stress.

The marked b with grey color for bars with thickness above 1 inch.

High strength low alloy steel-AISC table 2-5 for plates-CM#14.

We have one category for high-strength low alloys: ASTM A 572. It has five grades, grade 42, for which the yield stress equals 42 ksi, and the ultimate stress Fu equals 60 ksi.

The second grade is grade 50, for which the yield stress equals 50 ksi and the ultimate stress Fu equals 65 ksi.

The third grade is grade 55, for which the yield stress equals 55 ksi and the ultimate stress Fu equals 70 ksi.

 The fourth grade is grade 60, for which the yield stress is 60 ksi and the ultimate stress Fu is 75 ksi.

The last grade is grade 65, for which the yield stress is 65 ksi and the ultimate stress Fu is 80 ksi.

Corrosion-resistant high-strength low alloy-AISC table 2-5 for plates-CM#14.

According to CM #14, there are two groups for the corrosion-resistant high-strength low alloy: ASTM A 242 and ASTM A 588. ASTM A 242 has three values: yield stress, 42, 46, and 50 ksi, and ultimate stress, 63, 67, and 70 ksi.

ASTM A 588 has three values of yield stress, 42, 46, and 50 ksi, and ultimate stress, 63, 67, and 70 ksi.

What are Quenched and tempered steel?

Quenching and tempering strengthen materials like steel and other iron-based alloys. These processes heat the material while cooling it in water, oil, forced air, or gases such as nitrogen.

Quenched and tempered alloy-AISC table 2-5 for plates-CM#14.

We have ASTM A 514 c for quenched and tempered alloy, which has two values: yield stress of 90 and 100 ksi and ultimate stress of 100-130 and 110-130 ksi.. The symbol c stands for available as plate only.

The first yield stress Fy value equals 90 ksi, and the ultimate stress of 100-130 ksi is Gray from over 2.5-4.00 inches to over 5 to 6 inches.

The second yield stress Fy value equals 100 ksi, and the ultimate stress of 110-130 ksi is marked Grey from up to 0.75 inches to over 2-2.5 inches.

For quenched and tempered low-alloy, we have ASTM A 825 c, which has one yield value of 70 ksi and ultimate stress from 90-110 ksi.

A Solved problem for ASTM A514 plate-CM#14.

A plate Pl3x8 of A514 steel will be used as a tension member in a truss. What values are for the yield stress Fy and ultimate stress Fu to be used in the member’s design?

For CM#14, from the given thickness of the plate, which is 3 inches from ASTM A 514, we find that the grey square is available for plates from 2.5 inches to 4 inches but for yield stress of 90 ksi and fu from 110-130 ksi. Our Fy will be 90 ksi, and Fu will be 110 ksi.

Review of AISC table 2-5 for plates-Construction manual-CM#15.

In the next slide, we have AISC table 2-5 for plates, with the heading applicable ASTM specifications for plates and bars for CM#15.

Carbon steel-AISC table 2-5 for plates-CM#15.

For carbon steel, we have four groups: ASTM A36, a new ASTM A 283, ASTM A 529, and a new ASTM A 709. The relevant values for yield stress and ultimate stress are included in the table.

High strength low alloy-AISC table 2-5 for plates-CM#15.

We have four categories for the high-strength low alloy. Three added categories are ASTM A 709, grade 50, and ASTM A 1043 with two grades, grade 36 and grade 50.

The third ASTM A1066 has five grades. The relevant values for yield stress and ultimate stress are included in the table.

 

Corrosion-resistant high-strength low alloy-AISC table 2-5 for plates-CM#15.

According to CM #15, there are two groups for the corrosion-resistant high-strength low alloy: ASTM A 242 and ASTM A 588.

Quenched and tempered alloy-AISC table 2-5 for plates-CM#15.

For quenched and tempered alloy, we have ASTM A 514 c. It has two yield stress values: the first value is Fy=90 ksi, and the ultimate stress is 100-130 ksi.

The second value is  Fy=100 ksi, and the ultimate stress is 110-130 ksi. The symbol C stands for available as plate only.

The ASTM A 852 c  was removed from the quenched and tempered alloy in CM #15. We have a new ASTM 709 with four grades: GR. 50W, GR for quenched and tempered low-alloy, Hps 50W, Gr.HPs 70W and Gr HPS 100W marked e.

Corrosion resistant and Quenched and tempered low-alloy-AISC table 2-5 for plates-CM#15.

A new category, corrosion-resistant and Quenched and Tempered low-alloy, has been added. It has a new ASTM 709 with four grades—GR. 50W, GR. Hps 50W, Gr.HPS 70W and Gr HPS 100W marked e.

A Solved problem for ASTM A514 plate-CM#15.

A plate Pl3x8 of A514 steel will be used as a tension member in a truss. What values are the yield stress Fy and ultimate stress Fu for use?

Based on CM#15, from the given thickness of the plate, which is 3 inches from ASTM A 514, we find that the grey square is available for plates from 2.5 inches to 4 inches but for yield stress of 90 ksi and Fu from 110-130 ksi. Our Fy will be 90 ksi, and Fu will be 110 ksi. There are no changes between CM#14 and CM #15 for A514 steel.

Refer to specification 2016- in Chapter General provisions, for materials section A3.

Table A 3.1 listed materials based on the new specification-360-22.

Table A3.1 shows the new specification AISC-360-22 for the used ASTM A. The ASTMA list was tabulated, and the corresponding yield stress in both imperial and metric was included.

The first table lists the plates with the different ASTMA grades.

The second table lists the plates, bars, and sheets with the different ASTMA grades.

Table 1-7A-Workable gauges for angles-CM#14.

Table 1-7A is for the workable gages in angle legs in inches, if we have an unequal angle, for the short leg. The horizontal distance is shown as g, from the edge to the center to the first fastener line. Table 1-7A includes angles with legs from 1 inch to 8 inches.

For the other, long leg r leg, we have gauge distances g1 and g2. Their distances are shown for the various leg distances. Starting from 8 inches descending to 1-inch length, descending to 1-inch length, and g from 5/8 for a 1-inch angle to 4.5 inches, and the values for long leg with two gauge lines for g1 from 3 to 2 inches.

An angle of 4″ leg can carry only one line of bolts. For a leg angle of 5 inches, it is possible to have two lines of fasteners. Please check the next slide for more details.

Table 1-7A-Workable gauges for angles-CM#15.

Table 1-7A-Workable gauges for angles for tension members based on CM#15 have sizes of legs added that were not included in the previous construction manual CM#14 for sizes 10 and 8 inches. Gauges g3 and gauge 4 were added, meaning an angle with a 12-inch leg can carry four gauge lines of bolts.

The next post contains Solved problems for net area estimation.
For a useful external link, see Chapter 3, Tension Members, and Bartlett Quimby.