Apply AISC LRFD procedure to design a welded connection for a vertical truss member L127x76x9.5 with 10mm thick gusset plate using A36 steel and E60 electrode. The member is applied by a factored tensile force of 0.5R kN. Show your results on a sketch, complete with dimensions using standard notations. T=0.5R KN L 127 x76 x9.5 10 mm thick gusset plate Figure Q.3.
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Take R as 70
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- The plate shown is fastened to the fixed member by five 10-mm-diameterrivets. Compute the value of the loads P so that the average shearing stress in any rivetdoes not exceed 70 MPa. Present drawings/FBD’s illustrating your solution.The one end of a hollow square bar whose side is 10 with 1 thickness is under a tensile stress 102500 and the other end is connected with a U bracket using a double-pin system. Find the minimum diameter of pin is used according to shear strength. Take the factor of safety as 1.5 and σall =243000 psi for pin material.Given: Snow: 20 psf of horizontal projection Roofing: 12 psf MC8 x 8.5 purlins Truss weight: 1000 lb (estimated) Required: Select a structural tee for the top chord. All connection longitudinal plus transverse welds. Assume a connection length of 2". Spacing of the truss is 15 ft.
- The plate shown is attached by using three M12x2 grade 8.8 bolts. Which screw is subjected to the largest stress? What safe load ( static) F can be supported by the screw for n=1.5.If the 18 mm plate is connected to two cover plate of 10 mm on top and bottom, what is the capacity of the connection in double shear? Assume that the shear planes pass though the threaded portion. State the condition necessary for these strengths to be available. (Draw the connect first and calculate the capacity)Two flat bars loaded in tension by force P are spliced using two rectangular splice plates and two 0.350 in. diameter bolts. Away from the connection, the bars have a width of b = 0.625 in. and a thickness of t = 0.15 in. The bars are made of polyethylene having an ultimate tensile strength of 3200 psi and an ultimate bearing strength of 1500 psi. The bolts are made of nylon that has an ultimate shear strength of 4400 psi. Determine the allowable load P for this connection if a safety factor of 3.7 is required. Consider tension and bearing in the bars and shear in the bolts. Disregard friction between the plates.
- The riveted lap connection shown consists of two(2) – PL 12 mm × 280 mm. 1. If allowable bearing stress in holes is 1.2Fu where Fu is the ultimate strength of the plate and which is equal to 400 MPa, find the maximum allowable force P that can be applied neglecting effect of eccentricity. a. 563.3 kN b. 460.8 kN c. 683. 6 kN d. 405.9 kN 2. If allowable yielding of gross area is Fy/1.67, where Fy is the yield strength of the plate and which is equal to 250 MPa, find the maximum allowable force P that can be applied neglecting effect of eccentricity. a. 534 kN b. 560 kN c. 446 kN d. 503 kN 3. If diameter of hole equals diameter of rivet, what is the net area of edge-3-4-edge in square millimeters? a. 2540 b. 2590 c. 2880 d. 2040Simply Supported Beam ABCDE below carries multiple loads as shown. A built-upsection made from a T-Section and a Channel (C-Section) fastened together by 16mm∅ bolts,equally spaced from the center of the section, with shearing capacity τ=100 MPa, for bearing σb= 220 MPa for rivets in single shear and σb = 280 MPa for rivets in double shear. E=200GPa forall materials. Determine the spacing of rivets in mm.8. Considering sag rods and tie rods at third points, what is the required diameter of sag rods? (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) 6.00 900 900
- an angle bar 100x100x11 mm tension member is connected with 20-mm-dia bolts as shown in the fig. both legs of the angles are connected. use fy=248 MPa and Fu=400 MPa. 1. determine the nominal strength for tensile yielding in the gross section. a. 515.59 kN b. 429.67 kN c. 545.60 kN d. 390.10 kN 2. determine the effective net area of member a. 1573 mm^2 b. 1632 mm^2 c. 1605 mm^2 d. 1815 mm^2 3. determine the nominal strength for tensile rupture in the net area. a. 642 kN b. 730 kN c. 554 kN d. 650 kNThe plate shown in the figure is fastened to the fixed member by three 10 mm diameter rivets. Compute thevalue of the loads P so that the shearing stress of any rivet does not exceed 70 Mpa. SHOW COMPLETE SOLUTIONS DRAW FBD4. from the preceding problem, determine the ultimate tensile force Pu that the bolted connection could carry against tensile rupture in the net section. Use A-50 steel and LRFD.