Structural Steel Design (6th Edition)
6th Edition
ISBN: 9780134589657
Author: Jack C. McCormac, Stephen F. Csernak
Publisher: PEARSON
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Chapter 2, Problem 2.4PFS
To determine
To find maximum combined load for LRFD for given loading
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Compute the maximum combined loads USING THE RECOMMENDED ASD EXPRESSIONS FROM THE AISC.
D = 100 psf
L = 70 psf
R = 12 psf
Lr = 20 psf
S = 30 psf
3. Load Tracing
Determine the Columns loads assuming:
DL (decking, flooring, etc.) = 30 psf
LL (occupancy) = 50 psf
Total Load = 80 psf
2
10⁰
A
loi
GI
OPEN
7B-270
DECKING
DECKING
B-3
D
4-3
G2
TYPICAL FLOOR FRAMING
5-19. Compute the maximum total service live load moment that can be
applied to the A572, Grade 50 section shown if K,L = 16 ft and
K,L, = 11 ft. Assume that the service load is 30 percent dead and 70
percent live. Solve by both LRFD and ASD methods. (Ans. 466.8 k
LRFD, 460.8 k ASD)
PL1 X 14
PL1 X 12
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- For Probs 2-4 determine the maximum combined loads using the recommendedASIC expressions for LRFD.arrow_forward2. Load Tracing For the load-tracing problem below, construct a series of FBDs and show the propagation of loads through the various structural elements. Determine the column loads assuming: DL (decking, flooring, etc.) = 10 psf LL (occupancy) = 40 psf Beam B-2 spans between girder G-3 and column B-2 and beam B-3 spans between girder G-3 and column C-2. A B D 101 101 101 GI OPEN DECKING B-2 'DECKING· M B B-3 43 G2 TYPICAL FLOOR FRAMINGarrow_forwardNote: please use Set B data thank you 2° M₂ A B * 4 m 2m The cantilever beam above is made up of concrete with E- 70 MPa, refer to the table below for the properties and loads for the beam: PROPERTIES LOADS SET b (mm) h (mm) w (kN/m) Mb (kN-m) A (1,3,5,7,9) 300 500 20 40 B (2,4,6,8,0) 250 400 15 45 Using area moment method, determine the following: Flexural rigidity of the beam in N-men²arrow_forward
- Steel L-6m, 0-25mm, 2.5m 4.5m E=200GPG 0-15mm, E-70GP B A PRODT Q1) (20Marks): Find the max allowable load (P) which can be supported by three rods as shown in Figure (1) so that the stresses are not exceeding (150MPa) in Steel and (100MPa) in Aluminum, assume that the floor is to be rigid but it is not necessary to remain horizontal also the force at (B) is equal to the force at (C)? Aluminum L-4m, Figure (1)arrow_forwardMy teacher gave us a problem to think about before next class and I'm having a hard time with it please help with this.arrow_forwardFor the following floor plan, determine the required flexural strength of interior girder C-D on column line 3, using LRFD only if the floor is used for office space. In addition, you can assume a girder self-weight of 300lb/ft, a uniform dead load of 10 PSF (excluding floor weight) and a 5-inch thick reinforced concrete floor.arrow_forward
- I need the answer as soon as possiblearrow_forwardDetermine the number of a glulam column 3.0 m in length that support an axial load of 120 kN. The column is to be built with 35mm thick and 200mm wide laminations of Yakal lumber (E = 9.78 GPa, Fc = 15.8 MPa). Assume a normal load duration, wet service condition and fixed-end connection with lateral support at both ends.arrow_forwardThe concrete girders shown in the photo of the passenger car park- ing garage span 30 ft and are 15 ft on center. If the floor slab is 5 in. thick and made of reinforced stone concrete, and the specified live load is 50 lb/ft? (see Table 1–4), determine the distributed load the floor system transmits to each interior girder. TABLE 1-4 Minimum Live Loads* Live Load Live Load Occupancy or Use psf kN/m? Occupancy or Use psf kN/m? Assembly areas and theaters Fixed seats Movable seats Residential 60 2.87 Dwellings (one- and two-family) Hotels and multifamily houses 40 1.92 100 4.79 Garages (passenger cars only) 50 Office buildings Lobbies 2.40 Private rooms and corridors 40 1.92 Public rooms and corridors Schools Classrooms Corridors above first floor 100 4.79 100 4.79 Offices 50 2.40 40 1.92 Storage warehouse Light Нeavy 80 3.83 125 6.00 11.97 250 *Reproduced with permission from Minimum Design Loads for Buildings and Other Structures, ASCE/SEI 7-10.arrow_forward
- For problems 1a-1b given the loads specified, calculate the maximum load using ASCE 7-10 load combinations for allowable stress and strength design. a. D = 50 psf, Lr = 75 psf, R = 8 psf, and S = 20 psf.b. D = 13 k, L = 32 k, W = −22 k, Ev + Eh = 16 k, and −Ev + Eh = −16 k. (When doing strength design assume L comes from a live load less than 100psf)arrow_forwardconcrete slab with 180 mm thickness support dead load 5kN/m2 include self- weight and service live load 4kN/m?, find: 1- Adequacy of slab thickness. 2- Steel area required at point 1, 2, 3&4. 3- Total load on beam AB and DC. Use Ø12 mm, f = 28MPA and fy = 400MPAarrow_forwardD E pleasearrow_forward
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