A steel rod of 20mm diameter is used as a tie member in the roof bracing system, and may be subjected to possible reversal of stress due to wind load. What is the maximum permissible length of the number?
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- ASSIGNMENT #6 CASE 2 Purlin Design The figure shown has trusses 5.5m apart with midpoint sag rods and Purlins spaced 2.5m on center. The roof truss is inclined 1 vertical to 2 horizontal. The weight of roofing materials is 0.8 kPa, wind load is 0.7 kPa perpendicular to the roof surface, minimum roof live load is 0.6 kPa. Design a channel section of steel Fy = 345 mPa, for the purlins. Use LRFD and ASD of NSCP 2015.What is the Design Bending Stress, Om,y,d in a joist, if the strength grade is C162. See connection figure below. The rivets is 7/8 in. in diameter. According to the rivert supplier, the allowable stresses for the material are t = 15 ksi and on = 32 ksi. What is the allowable load of the connection? L4 x 3-1/2 W18 x 86 W24 x 117 Girder Beam
- A tension member in a roof truss is composed of two ASTM A36 structural steel angles that together have a net cross-sectional area of .(a) Compute the allowable total load if the allowable tensile stress is 22,000 psi.(b) If the total tensile load in the member is 150,000 lb, compute the actual tensile stress.For the two trusses shown, separately for problem (a) and (b), list all the zero-force members by inspection only, using the three criteria to select zero-force members as described in the online lectures for Week 8 as well as in the lecture notes. H F D. B. E K M (a) P H D BA K N A (b)The following diagram shows a partial floor framing plan of an elevated walkway building connecting an airport terminal building to the adjacent garage. The concrete floor is not post- tensioned. Material properties are: - Concrete weight: wt = 150 pcf - Concrete compressive strength: f'c = 4000 psi - Steel tensile strength: fy = 60 ksi - Stirrup consists of #4 bar - Framing members are not exposed to weather or in contact with soil. Use ASCE Table 4.1 to determine the design live load for this floor. 30-0¹ S Colm- Ö 90-0 - Mark 54 59 25 30-0¹ N BI -Sinder ASCE 7-10 Chapter 4 Live Load.pdf 50 psf 60 psf 100 psf 150 psf 2
- For the truss given below, what is the restraint that can not be remove to arrive with a primary structure?In order to reinforce a column in an existing structure, two channels are continuously welded to the column as shown below. Fy = 50 ksi for both the column and the channels. The effective length with respect to each axis is 16 feet. a) calculate the Moment of Inertia about each axis of the built-up shape. a) what is the available axial compressive strength and what is the percentage increase in strength? Use both LRFD and ASD.Gove a short description of the structures roller support and truss
- Note: Hi, pls need help. Any solutions are highly appreciated. I will rate this right away. Thank you in advance! What is the required diameter of sag rods? Considering sag rods and tie rods at third points (rounded value) A 20m Fink Truss are spaced at 'S' meters o.c. the purlins are made up of C10X20 sections and are spaced 1.1967m on centers. The truss has a height of 4m. Roof LL is 'RLL' N/m2 of roof surface and roof covering is assumed to be 'RDL' N/m2 of roof surface. Determine whether the purlins are adequate to carry such loadings. Fy = 248 MPa. C10X20 properties: w=29.76kg/m, A=3787.09mm2, Ix=32.84x106mm4, Iy=1.17x106mm4, Zx=317.91x103mm3, Sx=258.92x103mm3, Zy=44.25x103mm3, Sy=21.47x103mm3 S (m) RLL (N/m^2) RDL (N/m^2) 6.00 900 900Note: Hi, pls need help. Any solutions are highly appreciated. I will rate this right away. Thank you in advance! What is the required diameter of sag rods in mm? Considering sag rods and tie rods at midspan (rounded value) A 20m Fink Truss are spaced at 'S' meters o.c. the purlins are made up of C10X20 sections and are spaced 1.1967m on centers. The truss has a height of 4m. Roof LL is 'RLL' N/m2 of roof surface and roof covering is assumed to be 'RDL' N/m2 of roof surface. Determine whether the purlins are adequate to carry such loadings. Given: Fy=248 MPa w=29.76 Kg/m A=3787.09 mm^2 Ix=32.84×10^6 mm^4 Iy=1.17×10^6 mm4 Zx=317.91×10^3 mm3 Sx=258.92×10^3 mm3 Zy=44.25×10^3 mm3 Sy=21.47×10^3 mm3 S= 6 m RLL=900 N/m^2 RDL= 900 N/m^2The shown is a beam-column connection. Assuming normal weight concrete, f'c = 5000 psi, fy = 60 ksi and all the steel bars are uncoated. The top tension bars are # 9 bars and the bottom compression bars are # 8 bars. Column X2 X3 21.56 in. 17.25 in. 27.6 in. a 34.5 in. X1 Tension Steel I Compression I Steel a 4 Beam d b Beam Dimension and Reinforcement: b = 16 in., d =24 in. clear cover = 1.5 in. Stirrups are # 3 bars with 6 in. spacing. A, = 4# 9 bars, A', =2 # 8 bars The total cross-sectional area of the column ties confining the hooked bars are 1.38 in.² The minimum distance "X2" required by ACI 318-19 code is most nearly equal to: As A's Sec.a- a