The plane AA makes an angle 15º with the x-axis. 0.6 b. Solution Step I. Visualize the problem … a. 267.65 b. 89.69 c. 86.92 d. 93.83 Problem 24 If the beam is braced at the ends. a. Following PDF files regarding defects in timber are published in different websites. 9.62 x 105 c. 4.81 x 105 d. 2.40 x 105 Problem 45 Determine the minimum value of the depth d, in mm. A concentrated load P = 507 kN is applied at midspan. a. See figure TD- FE006. The height of the posts is 10 m and spaced at 60 m. The properties of the wood are: Allowable stresses: Bending and tension parallel to the grain = 21.8 MPa; Compression parallel to the grain = 13.2 MPa Shear parallel to the grain = 2.40 MPa; Compression perpendicular to the grain = 4.26 MPa Modulus of elasticity = 8.47 GPa Assume Ke = 1.2 Problem 7 Determine the allowable uniform weight of the electrical cables (in kN/m) with a maximum sag of 1 m. a. 66.21 b. a. a. a. 1 ¼ c. 1 ¾ d. 2 Problem 47 A weight W = 22.10 kN falls through a height h = 2.0 mm onto the midpoint of a simple beam of length L = 4 m (see figure TD-FE013). 3,425.72 b. 464.04 c. 155.45 d. 309.58, SITUATION 6 A small dam of height h = 2.5 m is constructed of vertical wood beams, as shown in the figure TD-FE005. 14.26 c. 14.34 d. 14.93 Problem 21 Which of the following gives the safe uniform load excluding its weight (in kN/m) that the beam could support based on the allowable shearing stress? 75 c. 200 d. 150 Problem 46 A seesaw weighing 4 kg/m of length is occupied by two children, each weighing 35 kg (see figure TD-FE012). 3.47 c. 3.52 d. 8.05 SITUATION 2 See figureTD-FE002. Solution to Problem 3 . 535.30 c. 565.69 d. 565.49 Problem 11 If the depth of the beam is 500 mm, determine the required width (in mm) so that the stress will not exceed the allowable bending stress. 6.00 c. 28.13 d. 56.25 Problem 41 Determine the moment capacity for composite action, in kN.m. 535.30 c. 565.69 d. 565.49 Problem 11 If the depth of the beam is 500 mm, determine the required width (in mm) so that the stress will not exceed the allowable bending stress. a. -6,074.04 c. -3,520.15 d. -3,543.20 Problem 36 Determine the maximum tensile stress in the palm tree, in kPa. a. Problem 2 Determine the moment capacity (kN.m) of beam AB, if its dimensions and properties are the same in column AC. xi The wood beams, which have thickness t = 100 mm are simply supported by horizontal steel beams at A and B. 11.55 c. 20.00 d. 23.09 W P, Steel beam A Wood beam t Cable t Wood beam Steel beam h Wooden h post Turnbuckle d, b b Side view Top view Fig. a. 30 c. 45 d. 90 SITUATION 3 See figureTD-FE003. a. The wooden member shown, a = 50 mm, b = 75 mm in cross section is subjected to a load P =200 kN. diagonal and horizontal compression elements in a truss). 1. 20.91 b. 218.90 b. 1.0 b. 100 b. 0.31 c. 0.25 d. 0.22 Problem 18 Compute the maximum depth of water if the allowable bending stress is 3.5 MPa, in m. a. a. 271.01 c. 282.84 d. 471.24 Problem 12 Determine the amount of waste in board foot in the construction of the beam. It is used as building structural element as well as door, window, partition etc. 6.00 c. 28.13 d. 56.25 Problem 41 Determine the moment capacity for composite action, in kN.m. Timber is an important construction material. a. 9.62 x 105 c. 4.81 x 105 d. 2.40 x 105 Problem 45 Determine the minimum value of the depth d, in mm. TIMBER FRAMING JOURNAL OF THE TIMBER FRAMERS GUILD NUMBER 71 MARCH 2004 CONTENTS Q&A: A BRACING EXCHANGE 2 C. Bremer, R. Christian, C. Hoppe, G. Mullen, J. Miller, B. Popenoe, B. Wormington TIMBER FRAMING FOR BEGINNERS 4 VIII. a. う. the horizontal re-ac. 96.65 c. 93.07 d. 99.00 SITUATION 11 Refer to figure TD-FE008. Each problem is intended to serve as a quick reference for the procedures on a particular topic. Experiment [ClO 2] o, mol/L [OH 1-] o, mol/L Initial Rate, mol/(L . CE 331, Fall 2000 Truss Design Example 5 / 8 Determine Live-Load Span Loading to cause Max. 11.55 c. 20.00 d. 23.09 W P b A B a A H θ A C L P Fig. highway problems on which much information already exists either in documented form or in terms of undocumented experience and practice. 218.90 b. Construct influence diagram for member 11 by applying distributed temperature load to member 11 of 1"/(6.5 E-6 x 10 ft x 12 in/ft) = 1282 oF. 0.5 b. Use Ke = 2.1 Allowable stresses: Bending and tension parallel to the grain = 16.5 MPa; Compression parallel to the grain = 10.5 MPa Shear parallel to the grain = 2.71 MPa; Compression perpendicular to the grain = 3.83 MPa Modulus of elasticity = 4.66 GPa Use: b = 2 m; h=2m What is the maximum allowable tensile force Tallow (in kN) in the cables, if: Problem 13 The wooden post is a short column a. 491 b. TD-FE004 Fig. 220 c. 240 d. 310 Problem 49 Find the maximum (simple) span (in m) of a floor joist consisting of a nominal 50 mm by 250 mm coco lumber spaced at 0.6 m on center to carry unfactored dead load of 4.8 kPa and live load 6 kPa. 8.18 c. 12.50 d. 16.82 Problem 38 Compute the compressive stress of member BC, in MPa. 63 b. 51.52 c. 49.76 d. 13.33 Problem 5 Determine the shear stress on plane A-A in MPa? SITUATION 1 See figureTD-FE001. The height of the posts is 10 m and spaced at 60 m. The properties of the wood are: Allowable stresses: Bending and tension parallel to the grain = 21.8 MPa; Compression parallel to the grain = 13.2 MPa Shear parallel to the grain = 2.40 MPa; Compression perpendicular to the grain = 4.26 MPa Modulus of elasticity = 8.47 GPa Assume Ke = 1.2 Problem 7 Determine the allowable uniform weight of the electrical cables (in kN/m) with a maximum sag of 1 m. a. Handbook on structural timber design to Eurocode 5 (IS EN 1995-1-1) rules including strength capacity tables for structural elements James Harrington1, Malcolm Jacob and Colin Short 1 James Harrington and Associates, Four One The Rise, Mount Merrion, Co Dublin. CE 405: Design of Steel Structures – Prof. Dr. A. Varma Chapter 2. The beam is made up of visually stress-graded unseasoned Apitong with 80% stress grade with an allowable bending stress of 16.5 MPa and the allowable shear stress is 1.73 MPa. 116.84 c. 151.51 d. 155.79 Problem 9 Calculate the ultimate shear capacity of the column, in kN. :_______________ Section: _________________ 75 I. a. Problem 16 Calculate the maximum bending stress if the depth of water is 2.0 m, in MPa. The majority of the timber design requirements in AASHTO are based on the National Design Specification for Wood Construction (NDS). The design investigation is centred on a lightweight Timber-Fibre floor system as a means of showcase the performative, functional and fabrication opportunities that this pairing provides. Given: Span, L = 6.0 m Slope (Top chord) = 1V:4H Dead load = 1200 Pa (inclined) Wind Pressure Coefficients: Live load = 576 Pa (inclined) Windward side = 0.2 pressure Wind load = 2440 Pa Leeward side = 0.6 suction Properties of the Purlin b = 75 mm ; d = 225 mm Weight of wood = 5.59 kN/m3 Fb = Ft = 16.5 MPa; Ew = 7.31 GPa; p = 9.56 MPa; Fv = 1.75 MPa For D + L + W load combination, a one third increase in the allowable stresses is allowed. SOLUTION: • Develop shear and bending moment diagrams. Problem 235 A timber column, 8 in. Sidesway is prevented. Neglect any adjustment on the bending stress. Unfortunately, this information often is fragmented, scattered, and unevaluated. 2.88 c. 4.69 d. 5.77 Problem 27 If the depth of the beam at notched point is 200 mm, and the length of notching is 3 m calculate the safe uniformly load (in kN/m) that the beam can carry without exceeding its allowable bending strength. California Civil Seismic Principles Solved Problems, Twelfth Edition (SDSP12) provides comprehensivepractice for both the California Civil Seismic Principles exam and the NCEES Structural Engineering (SE) exam. WHEN ROOFS COLLIDE 2 Will Beemer HISTORIC AMERICAN ROOF TRUSSES 12 II. in cross section, is reinforced on each side by a steel plate 8 in. 75 c. 200 d. 150 Problem 46 A seesaw weighing 4 kg/m of length is occupied by two children, each weighing 35 kg (see figure TD-FE012). 225 c. 350 d. 325 Problem 48 The square timber is used as a railroad tie as shown in figure TD-FE014. force in Member 11 (Member 11 is the top chord of panel 3 in this RISA model) 23. Use: h = 100 mm; α = 60° Determine the maximum force P that can be applied to the strut, in kN. But unfortunately timber usually possess different types of defects. 51.52 c. 49.76 d. 13.33 Problem 6 At what angle of plane A-A is the shear stress maximum, degrees? Design of Beams – Flexure and Shear 2.1 Section force-deformation response & Plastic Moment (Mp) • A beam is a structural member that is subjected primarily to transverse loads and negligible Column AC is 200 mm square timber with the following properties: Allowable stresses: Bending and tension parallel to the grain = 21.8 MPa; Compression parallel to the grain = 13.2 MPa Shear parallel to the grain = 2.40 MPa; Compression perpendicular to the grain = 4.26 MPa Modulus of elasticity = 8.47 GPa Use: H = 6 m; L=8m Problem 1 What is the allowable concentric load (kN) in column AC if both ends are pin-connected? a. Round-up your answer to the nearest 10 mm. GATE Question Papers with Solution In PDF 1991 – 2017 by Sonam Sharma 8 min read 16th Jan '19 3rd Apr '19 2 Comments The Graduate Aptitude Test in Engineering (GATE) is an exam that originally tests the complete Knowledge of various undergraduate subjects in engineering. 30.00 b. 528 c. 354 d. 165 Problem 2 Determine the moment capacity (kN.m) of beam AB, if its dimensions and properties are the same in column AC. The strut is glued to the horizontal member at surface AB. Comprehensive Practice in Seismic Design Concepts, Methods, and Standards. a. 15.00 c. 225.00 d. 6.83 1|Page Practice Problems 1 TIMBER DESIGN SITUATION 4 A log that is 600 mm in diameter is to be cut into a rectangular section for use as a simply supported beam. See figure TD-FE010 Allowable compressive stresses are: Parallel to the grain = 8.3 MPa Perpendicular to the grain = 2.5 MPa Problem 37 Determine the angle that AB makes with the horizontal, in degrees. Chapter 14: Sampling Design Leyla Mohadjer, Tom Krenzke and Wendy Van de Kerckhove, Westat This chapter presents information about PIAAC Main Studythe sample design and selection results. CLOSED NOTES, HANDOUTS, BOOKS AND HOMEWORKS *Read problems completely and carefully before beginning to solve. 68.28 b. The distance between the two troughs of the water surface waves is 20 m. wide and t in. TD-FE006 Fig. If the strut has a thickness of 50 mm and the glue can withstand an average shear stress of 1.0 MPa. a. The spacing of the girders is S 1 = 1.5 m and the spacing of the rails is S2 = 1.0 m. The load transmitted by each rail to a single tie is P = 7.5 kN. 0.840 c. 1.022 d. 0.965 Problem 20 Which of the following gives the safe uniform load including its weight (in kN/m) that the beam could support based on the flexural stress with size factor adjustment? Problem 16 Calculate the maximum bending stress if the depth of water is 2.0 m, in MPa. Column AC is 200 mm square timber with the following properties: Allowable stresses: Bending and tension parallel to the grain = 21.8 MPa; Compression parallel to the grain = 13.2 MPa Shear parallel to the grain = 2.40 MPa; Compression perpendicular to the grain = 4.26 MPa Modulus of elasticity = 8.47 GPa Use: H = 6 m; L=8m Problem 1 What is the allowable concentric load (kN) in column AC if both ends are pin-connected? Consider the table of initial rates for the reaction: 2ClO 2 + 2OH 1- ClO 3 1- + ClO 2 1-+ H 2 O. 3,425.72 b. a. 0.6 c. 0.7 d. 0.8 3|Page Practice Problems 1 TIMBER DESIGN Problem 32 Find the safe purlin spacing (m) for D + L + W where W is at the windward side. a. - For a rectangular section, f is equal to 1.5. 27.79 b. Solutions have been developed based on the 2015 and 2018 National Design Specification®(NDS®) for Wood Construction, and the 2015 Special Design Provisions for Wind and Seismic (SDPWS, as appropriate) . 3.43 b. In most cases the fastening of timber to timber requires little skill or knowledge of design. 3. 7.58 b. TD-FE002 5|Page Practice Problems 1 TIMBER DESIGN y h L Fig. 3.67 c. 5.77 d. 7.33 SITUATION 10 A timber beam 150 mm wide by 300 mm deep is to be reinforced at the top and bottom by steel plates 12 mm thick. a. - The ratio of Mp to My is called as the shape factor f for the section. a. 220 c. 240 d. 310 Problem 49 Find the maximum (simple) span (in m) of a floor joist consisting of a nominal 50 mm by 250 mm coco lumber spaced at 0.6 m on center to carry unfactored dead load of 4.8 kPa and live load 6 kPa. 471.24 b. 3.47 c. 3.52 d. 8.05 SITUATION 2 See figureTD-FE002. 30 c. 45 d. 90 SITUATION 3 See figureTD-FE003. a. The girders are restrained against lateral buckling by diagonal bracing, as indicated by the dashed lines. The spacing of the girders is S 1 = 1.5 m and the spacing of the rails is S2 = 1.0 m. The load transmitted by each rail to a single tie is P = 7.5 kN. Some problems have been posed as stand-alone problems, but others belong to a set in which all examples are associ-atedwithonestructure.Thefocusofthisdesigntoolisedu-cation; it is not to propose specific designs or details. Use: h = 100 mm; α = 60° Determine the maximum force P that can be applied to the strut, in kN. 4.09 b. 62.95 b. 89.69 c. 86.92 d. 93.83 Problem 24 If the beam is braced at the ends. A ball is thrown from the top of a building with an initial speed of 8 m/s at an angle of... Transverse waves – problems and solutions. a. 68.28 b. a. う. RAx , is 0 kN. 15 b. 20.91 b. (Disregard the weight of the tie itself.) (Disregard the weight of the tie itself. The attachment of non- structural elements is the responsibility of the architect or designer, unless specifically shown otherwise. The weight of the tree may be resolved into two resultant forces, a force P1 = 4 kN acting at a point 3.6 m from the base and a force P2 = 0.45 kN acting at the top of the tree, which is 9.1 m long. Problem 10 If the width of the beam is 200 mm, by geometry what is the depth of the beam, in mm? 1.2 c. 1.3 d. 1.5 SITUATION 12 A palm tree weighing 4.45 kN is inclined at an angle of 60º (see TD-FE009). 2.35 b. It contains design examples and complete solutions calculated using ASD and LRFD. In order to prevent corrosion in steel the reinforced beam is then wrap by structural fiber. 29.07 c. 28.19 d. 64.41 Problem 3 Calculate the safe uniform load (kN/m) including its own weight for beam AB. a. 0.31 c. 0.25 d. 0.22 Problem 18 Compute the maximum depth of water if the allowable bending stress is 3.5 MPa, in m. a. 0.19 b. If the allowable bending stress for the wood is 55 MPa. TD-FE004 Fig. 0.8 c. 1.0 d. 1.2 Problem 33 Find the safe purlin spacing (m) for D + L + W where W is at the leeward side. timber design requirements, procedures, and recommendations addressed in this manual. 89.49 b. Problem 4 What is the tensile stress at section A-A in MPa? a. Some of the functional requirements of staircases are; 113 b. 0.962 b. thick. Solve problems like a designer by mastering the design thinking process. a. a. What is the required thickness (in inches) of the board if allowable bending stress in the board is 24.75 MPa? University of Texas at Austin TD-FE010 Fig. 177.10 b. 1.31 c. 1.94 d. 1.42 SITUATION 7 A 80% stress grade Apitong beam 250 mm x 425 mm has a simple span of 8 m. Use: Fb (bending) = 16.5 MPa; Fv (shear) = 1.73 MPa; Ew = 7.31 GPa; Sp.gr = 0.57 Problem 19 Which of the following gives the size factor? 1.0 b. 66.21 b. University of Wisconsin-Madison and Dan L. Wheat, Ph.D., P.E. 3,434.16 c. 3,457.20 d. 6,074.04 SITUATION 13 The depth of notch of the joint shown equal to 50 mm. As the final solution the built up system composed from steel chords and diagonals connected to the timber beams by glued-in rods was designed. a. a. The wood beams, which have thickness t = 100 mm are simply supported by horizontal steel beams at A and B. Use: d = 315 mm; h = 300 mm; b = 250 mm Problem 40 Determine the moment capacity of the wood without the steel reinforcement, in kN.m. (Use the ratio of initial rates to get the orders). Construct influence diagram for member 11 by applying distributed temperature load to … 471.24 b. 2.88 c. 4.69 d. 5.77 Problem 27 If the depth of the beam at notched point is 200 mm, and the length of notching is 3 m calculate the safe uniformly load (in kN/m) that the beam can carry without exceeding its allowable bending strength. a. a. 1.47 b. a. 180 b. As a consequence, full information on what has been learned about a problem frequently is not assembled in seeking a solution. 2. If the strut has a thickness of 50 mm and the glue can withstand an average shear stress of 1.0 MPa. a. For a wide-flange section, f is equal to 1.1. 3.43 b. Chapter 9: Column Analysis and Design Introduction Columns are usually considered as vertical structural elements, but they can be positioned in any orientation (e.g. TD-FE012 7|Page Practice Problems 1 TIMBER DESIGN P2 L2 d L1 h P1 θ Structural fiber Steel plate b Figure TD-FE009 Fig. CONNECTIONS IN TIMBER STRUCTURES 6.1 Introduction The competitiveness of a timber structure, relative to other building materials, may be determined by the efficiency of the connections. 4.42 b. SITUATION 1 See figureTD-FE001. 89.49 b. 498 DESIGN EXAMPLES INTRODUCTION This chapter contains example problems in a format similar to what a designer might use when performing hand calculations. The diagonal is subjected to an axial load of 30 kN at an angle of 25° with the bottom chord. 0.8 c. 1.0 d. 1.2 Problem 33 Find the safe purlin spacing (m) for D + L + W where W is at the leeward side. a. 375.00 b. 4. 225 c. 350 d. 325 Problem 48 The square timber is used as a railroad tie as shown in figure TD-FE014. The bottom chord has a dimension of 75 mm x 200 mm while the diagonal member is 75 mm x 150 mm. a. The diameter at the base of the tree is 300 mm. a. 464.04 c. 155.45 d. 309.58 SITUATION 6 A small dam of height h = 2.5 m is constructed of vertical wood beams, as shown in the figure TD-FE005. 337.50 c. 202.82 d. 341.12 Problem 26 If the depth of the beam at notched points is 200 mm, determine the length of notching “b” (in m) without exceeding its allowable bending strength. The board is 5.8 m long, 200 mm, if the depth,... 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