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4. The loads on a roof beam consist of a dead load of 2 kN/m, a roof live load of 13 kN/m, and a wind load of 14 kN/m. a. If load and resistance factor design is used, determine the factored load (required strength) to be used in the design of this beam. Which AISC load combination controls? b. If allowable strength design is used, determine the required load capacity (required strength) to be used in the design of the column. Which AISC load combination controls?

4. The loads on a roof beam consist of a dead load of 2 kN/m, a roof live load of 13 kN/m, and a wind load of 14 kN/m. a. If load and resistance factor design is used, determine the factored load (required strength) to be used in the design of this beam. Which AISC load combination controls? b. If allowable strength design is used, determine the required load capacity (required strength) to be used in the design of the column. Which AISC load combination controls?

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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Solve this problem by using the given formula. Provide complete solutions.
STEEL DESIGN 2.3 LOAD COMBINATIONS NSCP 2010 includes combinations for both allowable stress design (ASD) and load and The number of combinations can be extensive, taking into consideration wind direction, « It is not unusual for computer printouts with 20 to 30 or even more load combinations to Fortunately, not all structural members will be subjected to every type of load. Therefore, of the load combination formulas. Load Combinations for Allowable Strength Design The following are the basic load combinations used with ASD, as given in NSCP 2010 20 1) D+ F 2) D+ H+ F+ L + T 3) D+ H + F + (L, or R) 4) D+ H + F + 0.75( L + T) + 0.75(L, or R) 5) D+ H + F + (W or 0.7E) 6) D+ H + F + 0.75(W or 0.7E)+0.75L + 0.75(L, or R) 7) 0.6D + W + H 8) 0.6D + 0.7E + H Example 2.1 Calculating Load Using ASD The loads on a steel beam consist of 150 kN due to dead load and 410 kN due to live considered. Using ASD, calculate the required strength of the beam. Load Combinations for Load and Resistance Factor Design The following are the basic load combinations used with load and resistance factor design 2010 203.3.1. 1) 1.4(D + F) 2) 1.2(D + F + T) + 1.6(L + H) + 0.5(L, or R) 3) 1.2D + 1.6(L, or R) + (f¡L or 0.8W) 4) 1.2D + 1.6W + fjL + 0.5(L, or R) 5) 1.2D + 1.0E + fjL 6) 0.9D + 1.6W + 1.6H 7) 0.9D + 1.0E + 1.6H Where: fi = 1.0 for floors in places of public assembly, for live loads in excess of 4.8 kPa, = 0.5 for other live loads
Transcribed Image Text:STEEL DESIGN 2.3 LOAD COMBINATIONS NSCP 2010 includes combinations for both allowable stress design (ASD) and load and The number of combinations can be extensive, taking into consideration wind direction, « It is not unusual for computer printouts with 20 to 30 or even more load combinations to Fortunately, not all structural members will be subjected to every type of load. Therefore, of the load combination formulas. Load Combinations for Allowable Strength Design The following are the basic load combinations used with ASD, as given in NSCP 2010 20 1) D+ F 2) D+ H+ F+ L + T 3) D+ H + F + (L, or R) 4) D+ H + F + 0.75( L + T) + 0.75(L, or R) 5) D+ H + F + (W or 0.7E) 6) D+ H + F + 0.75(W or 0.7E)+0.75L + 0.75(L, or R) 7) 0.6D + W + H 8) 0.6D + 0.7E + H Example 2.1 Calculating Load Using ASD The loads on a steel beam consist of 150 kN due to dead load and 410 kN due to live considered. Using ASD, calculate the required strength of the beam. Load Combinations for Load and Resistance Factor Design The following are the basic load combinations used with load and resistance factor design 2010 203.3.1. 1) 1.4(D + F) 2) 1.2(D + F + T) + 1.6(L + H) + 0.5(L, or R) 3) 1.2D + 1.6(L, or R) + (f¡L or 0.8W) 4) 1.2D + 1.6W + fjL + 0.5(L, or R) 5) 1.2D + 1.0E + fjL 6) 0.9D + 1.6W + 1.6H 7) 0.9D + 1.0E + 1.6H Where: fi = 1.0 for floors in places of public assembly, for live loads in excess of 4.8 kPa, = 0.5 for other live loads
4. The loads on a roof beam consist of a dead load of 2 kN/m, a roof live load of 13 kN/m, and a wind load of 14 kN/m. a. If load and resistance factor design is used, determine the factored load (required strength) to be used in the design of this beam. Which AISC load combination controls? b. If allowable strength design is used, determine the required load capacity (required strength) to be used in the design of the column. Which AISC load combination controls? Ans. a) Ru = 34.4 kN; b) Ra = 22.25 kN
Transcribed Image Text:4. The loads on a roof beam consist of a dead load of 2 kN/m, a roof live load of 13 kN/m, and a wind load of 14 kN/m. a. If load and resistance factor design is used, determine the factored load (required strength) to be used in the design of this beam. Which AISC load combination controls? b. If allowable strength design is used, determine the required load capacity (required strength) to be used in the design of the column. Which AISC load combination controls? Ans. a) Ru = 34.4 kN; b) Ra = 22.25 kN
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