A 10-ft long cantilever balcony is constructed of 2x12 Doug-Fir-Larch (DFL) joists. Determine the controlling load combination and corresponding load duration factor for moment and shear. (Hint: see NDS Supp. Appendix B2 for load combinations.) Each 2x12 carries: dead load (DL = self-wt + decking = 50 psf, spaced at 2-ft on center), snow (SL = 250 plf)  construction load (CL = 300 plf)

Q: Determine the theoretical spacing of a 75 mm x 200 mm x 3.4 m floor joist to a dead load of 2300…

A: Given, The floor dimension is=75 mm×200 mm×3.4 mm DL=2300 N/m2=2.3 kN/m2 LL=1800 N/m2=1.8 kN/m2…

Q: Q1- the reinforced flat plate roof slab system that shownin figure. Supports a service live load of…

A: Given; f'c=22 MPaslab thickness. D =200mm=0.2mLL=1.5 kN/m2Super dead load,SDL=3.4 kN/m2DL=25…

Q: 03/ Find the service concentrated live load (P) that causes 1.5 MPa tension stress at the bottom…

A:

Q: A 30 cm X 16 cm rolled steel joist of I-section has flanges 11 mm thick and web 8 mm thick. Find the…

A: Draw the figure.

Q: A 150mm x 400mm x 3m timber beam (simple span) is to be loaded with uniform load and a concentrated…

A: Given: The dimension of the beam is 150 mm x 400 mm x 3 m. The concentrated load is 20 kN. The time…

Q: For the Integrated Project (office building), design the Floor Girders in the gravity-only system,…

A:

Q: Determine the flow in each pipeline shown if f = 0.02 for all cases. [Ans. Q, = 0.153 m³/s, Q, =…

A: Consider the free body diagram; Expression of Bernoulli's equation to C and D;…

Q: A 66-foot long plate girder must support a uniformly distributed load and concentrated loads at the…

A: a) the girder cross section and the required spacing of intermediate stiffeners: Wu=1.2WD+1.6WL…

Q: Propose and sketch one type of connection for a non-sway frame with simple construction.

A:

Q: Tong W-shape spaced center, as framing plan below. The dead load applied to the floor is 40 psf and…

A: Solution “Since you have asked multiple questions, we will solve the first question for you. If…

Q: 3. Given the following information, determine the maximum permissible axial load in the square…

A: Given:- The longitudinal reinforcing bars = 4-#10 bars The yield strength of the steel = fy = 60 ksi…

Q: Carrepite A with ㅏ 2m 50 KN ALB 50KN.m 水 3m 20 kN/m + 2m 1KN/M fre 4m 3m 4 kN/m *Draw SFD and B.m.D…

A:

Q: Problem 2. The framing plan shown has the following loadings: Unit weight of 100mm slab thickness:…

A: Given: Slab thickness, t = 100 mm unit weight of the concrete, γ= 23.5 kN/m3 Ceiling load = 1.8 kPa…

Q: Consider pattern loading (skip loading) for live load (shown black on the sketch) for the simply…

A:

Q: - A piched roof system is composed of roof tw re spaced 48 in 0.c. The trusses have a 6:12 pitch.…

A: According to given data The truss have 6:12 pitch Roof truss has a span of 60 ft.horizontally spaced…

Q: A simply supposted einforced concrele beam has a span of 6 m - The beam is subjeckd to a uniformly…

A:

Q: Check the latticed column section shown in below Figure for an axial load of 580 kips. The column…

A:

Q: Determine if a 2X10 spruce-pine-fire No.1 member is adequate for the bottom chord of the typical…

A: Solution: Given Data: Dead Load=20 ps nowDead Load=40 psfCeiling Dead load =15 psfTruss span=36…

Q: 9.42 A 25-mm-diameter aluminum rod, 3 m long, is subjected to an axial tensile load of 67 kN. Assume…

A:

Q: Determine the moment strength QM, of the beam below if f = 2,500 psi and using Grade 60 rebar. 'n

A:

Q: For the beam and loads given, select stirrups spacing and fy =414MPa. The dead load shown include ve…

A: The values and diagram given in the question are as follows: Characteristic compressive strength of…

Q: The diagram shows a glulam beam. Douglas Fir from the 24F-1.7E is the member.(ASD only)Stress Level…

A:

Q: Select simply supported hem-fir (S4S) joists to support a floor live load of 40 psf on a 12-ft…

A: The given data is: Length of span, L=12 m Floor live load=40 psf Floor dead load=15 psf Spacing…

Q: 3) What is the load to cause the column of problem 2) to crush? Will the column buckle or crush…

A: For 8 ¾ x 12 in.  A=105.00in2 Iy=1260.00 in4 ry=3.5in Iz=669.922 in4 rz=2.5in Total height, L=25ft…

Q: Determine the bending stress along the x-axis of the W section. Determine the bending stress along…

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Q: The first-floor framing plan of a single-family dwelling is shown. Determine the magnitude of the…

A:

Q: A7 long timber column with the cross section shown below is fixed on one end and pin connected on…

A: (A)  compressive stress in the columnfc=PA+MxIyy×exwhere  Ixx=4×6312=72 in4Mx=P×ex=0.5P    and…

Q: joist would be the shallowest possible choice

A: To pick the shallowest joist possible from the given choices.

Q: The framing plan of the flat roof of a gymnasium is shown. De- termine the design free-body dia-…

A: Dead load is D = 20 lb/ft2load combination number 2 [L.C.2]

Q: Design a reinforced concrete rectangular beam b approximately d/2 to carry and ultimate uniform load…

A:

Q: Determine the required number of 20mmø of the channel floor joist shown. The top flange is 500mm…

A:

Q: Module 7: Bending and Shear in Simple Beams Module 8: Bending and Shear Stresses in Beams Module 9:…

A: Step 1: Draw FBD of given loading conditions of the beam.Step 2: Find reactions in beam by using…

Q: h) An internal floor is to supported using grade C16 timber joists of width, b = 25 mm. The design…

A:

Q: Compare WCB & Reduced Bearing.

A: Bearings Bearings are the angle measurement with respect to North and South meridian to identify the…

Q: Two gage marks are placed exactly 250 mm apart on a 12-mm diameter aluminum rod. Knowing that, with…

A:

Q: Homework #8 60 #/' 12' fb = My/l = M/S fv=VQ/lb (general formula) A 2x8 joist (b=1.5"; h=7.25") is…

A: Magnitude of UDL =W=60lb/ft Length of beam=12ft

Q: 2. A square tied column is 430 mm x 430 mm with 8- 28 mm Grade 415 bars. The lateral ties are 10 mm…

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Q: Please design the shear stirrups accordingly.

A:

Q: 2- The floor system shown above design to support service live load=4 kN/m? and total dead load = 10…

A: The given data is: Live load=4 KN/m2 Dead load=10 KN/m2 Ultimate slab load=1800 KN Fc'=30 MPa Fy=400…

Sizing Joists and Rafters

In civil engineering and building construction, joists and rafters are the major components including beams and columns. Almost every structural construction including buildings, skyscrapers, bridges, commercial complexes, and so on makes use of joists and rafters to provide structural integrity to the building. Joists are primarily thick long pieces of metals, concrete, or wood that are used to support the floor and ceiling. On the other hand, rafters form the major component of pitched roofs, which are a series of sloped long pieces extending from a ridged area that makes contact with the plane area of the wall. They account for the load-bearing of the building along with the beams.