ARC322 Homework #1B
Since A = B, R1 = R2 = P/2 = 12,500 LB/2 = 6,250 LB
W = wL = (1200 LB/ft)(28 ft) = 33,600 LB W would then be placed at the center of the span, so R1 = R2 = W/2 = 33,600 LB/2 = 16,800 LB
R1 = PB/L = (7750 LB)(6 ft)/21 ft = 2214.

ARC322 Quiz 9 14 Points
1.
Name _KEY_
What is fb for a structural member where it is loaded normal to its strong axis for the purposes of ARC322? fb = 0.667 fy = 0.667 x 36,000 lb/in2 = 24,000 lb/in2 (rounded)
2.
What is fb for a structural membe

Arc322 Quiz 10 2008
Name _KEY_
Pick the appropriate letter from the moment and shear diagrams below based on the beam descriptions in Questions 1 4.
1. For a simple beam with a concentrated load at its center, identify the moment and shear diagram

ARC322 Homework #14 16 Points
1. A W18x35 spans 25 ft. It carries a load of 239,000 lb from an interior column (W12x58) on the top of the W18x35 10 ft from R1. Is web stiffening required in the beam? Structural Diagram Required. P = 239,000 LB on a W

ARC322 Homework 16 12 Points
SOLUTION
1. A building measures 40 ft by 100 ft. It carries a DL = 35 lb/ft2 (w/o joist DL) Tributary 35 lb/ft2 x 5 ft = 175 lb/ft It carries a LL = 20 lb/ft2 Tributary 20 lb/ft2 x 5 ft = 100 lb/ft The joists are spa

ARC322 Homework 17 16 Points KEY RYAN . on this one, they can use EITHER timber or beam allowable stresses . I've done it for both . EITHER solution is OK .
1. Select a wood beam for a span of 24 ft with a spacing of 6 ft OC where the DL+LL is 135lb

ARC322 Homework 18 . 15 Points
KEY
1. A 2x4 wall supports a 4x8 wood beam normal to the wall with a total load of 25,000 lb on the beam (1/2 of the load goes to the wall). Is the condition OK with respect to compression perpendicular to grain? 2 po

ARC322 Homework 19 29 points
Key
1. A simple DFL 4x8 No.1 beam spans 18 ft and carries a load of 325lb/ft. Show that the Beam specified is OK in bending. If it is not OK, select an appropriate size beam. Is it OK with respect to horizontal shear? I

ARC322 Homework 20 26 Points
Key
1. A DFLSS 6x18 wood beam spans 20 ft. It carries a DL+LL of 185lb/ft. Is it Ok in deflection based on L/240? 4 points
1 point dwg Deflection = 5WL3/384EI D = (5(3700 lb)(20 ft x 12 in/ft)3)/(384 x 1,600,000 lb/in2

ARC322 Homework 21 25 points . NO POINTS 2008
KEY
1. Design a wood beam that simply spans 14ft. The beams are on 6ft centers. The beam carries a DL of 35lb/ft2 and a LL of 40lb/ft 2. The beam sits atop a 2x4 wall. Use DFLSS.
2 points dwg
Member S

ARC322 Homework 23
1. Can columns undergo both axial compression and bending stresses simultaneously? Yes. There are a couple of common ways. First, they can be loaded under gravity conditions eccentrically which will create bending as well as axial

ARC322 Quiz 11 Winter 2008
1
Name _KEY_
Why did bolts replace rivets in structural member joining? Bolting was more economical than riveting.
2
What is the most common high strength bolt grade generally specified for structural member joining? A3

ARC322 Quiz 12 2008
1
Name _KEY_
What is light gage steel framing made from? A B C D E F G Aluminum Aluminum coated structural steel Galvanized steel Brazed Steel Galvanized Aluminum Anodized Aluminum Steel
2
What is needed if a light steel frame

ARC322 Quiz 13 2008 9 Points
1
Name _KEY_
Horizontal Shear Stress
When designing a wood beam, which stress is the most limiting?
2
What is the actual cross sectional area of a 4x4?
3.5 in x 3.5 in = 12.25 in2
3
When designing a wood beam, what

ARC322 Quiz 8 10 Points
1.
Name _
A simple beam spans 24 ft. It carries a point load 10 ft from R1. Sketch the generic shear diagram.
10'
2. What are the two code allowable design methods for steel? A. ASD . Allowable Stress Design . sometimes cal

ARC322 Quiz 7
Name _KEY_
1
A round extra strong steel column has a tributary area of 1000 ft2 and carries a DL of 85 lb/ft 2 and a LL of 45 lb/ft 2. The column has an unsupported length of 15 ft. What is the most economical column diameter that ca

ARC322 Homework 4 20 Points
1. What is the weight per foot of a L3x2x1/4? 1 Point 4.1 lb/ft 2. What is the least radius of gyration of the L3x2x1/2? 1 Point 0.428 in
KEY
3. What is the inside diameter of a 5" diameter extra strong pipe? 1 Point 4.8

ARC322 Homework 4 2008
1. A WF has a maximum moment of 124,500 ft-lb. Select a WF for this condition. W16x40 Check: S = M/f = (124,500 ft-lb x 12 in/ft)/24,000 lb/in2 = 62.25 in3 W16x40 S = 64.7 in3 . OK (Note . a W14x43 will also work with an S = 62

ARC322 Homework #5 2008 1. You are designing a steel frame structure. The columns are on a 40' grid. The DL+LL is 265 lb/ft2. What is the most efficient WF beams under the two possible loading conditions?
Beam A
Tributary Area A A = 20 ft x 40 ft =

ARC322 Homework 8 30 Points Total . 1 Point Each Diagram
M = PL/4 = (12,500 LB x 24 ft)/4 = 75,000 ft-lb 1 point S = M/f = (75,000 ft-lb x 12 in/ft)/24,000 lb/in2 = 37.5 in3 1 point NOTE: Final test MUST be shown for each member selected. W16x26 S =

ARC322 Homework #9 . Module 13 15 Points
KEY
1. A cantilever beam has an L of 8 ft and supports a load of 1875 lb/ft 6 ft from the root of the beam to the 6 ft location. Select a WF member based on a calculated S. 3 points w = 1875 lb/ft
6 ft 8 ft

ARC322 HW#11 Module 15 2008
1.
KEY
A simple beam (W27x94) spans 29 ft. It carries a uniform load of 1275lb/ft. What is the maximum shear stress? Does it meet the ASD allowable? 4 points
2.
A W14x53 cantilevers 8 ft. It carries a 8,000 lb point lo

ARC322 HW#10 Module 14 2008 No Sketches are Required
1. A beam has a required S of 87.5 in3. Select a WF. 1 point
KEY
From Sx Table W18x50 . Sx = 18.9 in3 > 87.5 in3 . OK . close consider beam weight 2. A beam has a required S of 167 in3. Select a

ARC322 Quiz 1 Winter 2008
KEY
1. What are the units of moment used in the flexure formula for a beam? In-lb Lb/in2
2. What are the units of E?
3. What are the units of shear stress? Lb/in2 4. What are the units of section modulus? In2
5. What is

ARC322 Winter 2008 Quiz 2 . 10 Points
1.
Name _KEY_
You have calculated a required section modulus of 100.52 in3. Which Steel member would you select based on the most economical member? A. B. C. D. E. F. G. W12x72 where S = 97.4 in 3 W14x68 where

ARC322 Winter 2008 Quiz 3 . 14 Points
Name _KEY_
1 Paragraph Essay with Required Diagram 1. Should the architect seek maximum strength (ultimate strength) when designing a structural member such as a beam or column considering stress vs. strain? W

ARC322 Quiz 4
10 Points
Name _KEY_
Place your final answers in the boxes provided.
1. A simple steel beam carries a uniformly distributed load of 1235 lb/ft in a 25 ft span. What is the required section modulus? No sketch required.
M = wL2/8 = (1

ARC322 Quiz 5 Name _KEY_ 10 Points . No Sketches Required UNLESS Specifically Asked
1. What is the formula for the maximum moment of a simple beam with a concentrated load at its mid span? M = PL/4 2. What is the formula for the maximum moment for a

ARC322 Quiz 6
Name _KEY_
Calculate the require section modulus for a simple beam that spans 28 ft and carries a uniform load do 2200 lb/ft. No sketch required. M = wL2/8 = (2200 lb/ft)(28 ft)2/8 = 215,600 ft-lb S = M/f = (215,600 ft-lb x 12 in/ft)/

ARC322 Quiz 14 . 14 Points
What is E for a 4x8 DFL No 1 beam? 1,700,000 lb/in2
Name _
What three stresses would need to be resolved for the beam/reaction shown in the photo at the right at the reaction? A Shear Stress B Compression perpendicular to