A simply supported steel joist with a 4.0 m effective span carries a uniformly distributed Ioad of 40 kN over its span inclusive of self weight. The beam is supported Taterally throughout. Select a suitable section (f = 250 N/ mm2) and che
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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.For the truss given below, what is the restraint that can not be remove to arrive with a primary structure?Write a technical short note on pre-stressed box girder.
- Wood planks are used on each working level. The deck width/bearer span is 5 ft.. The bearers and posts are standard pipe and the pipe material is A36 steel with a yield stress of 36,000 psi and modulus of elasticity of 29,000,000 psi. Bearers are to be located at a vertical spacing of 10 ft (largest, lowest post height). Posts are to be 7 ft oc (plank length) parallel to the building wall and 5 ft apart (bearer length) perpendicular to the building wall. There are four working levels and the anticipated scaffold loading will be med duty. A. Assuming the ultimate bending strength of the planks is 3,800 psi (apply a 4:1 F.O.S.), determine the required minimum plank thickness to the nearest 100th. B. Based on the bearer material provided, what is the minimum pipe size that can be safely used? See Appendix 2 in your textbook for steel pipe properties. C. Based on the post material provided, can a 2” standard pipe be used safely? Be sure it satisfies buckling stress conditions only.Determine the reaction forces for a middle rafter and the beam. ELgreD HAPTERG BEAHING HALL -FAFTBRS @ 24'ae. -BBAM •COLIMN FRAMING PLAN -BEAM -COLUMNS DEABINT WALL FRONT ELEVATION SIDE ELEVATION Live snow load = 40 psf • Dead load: (1) Roof and Sheathing = 5 psf, (2) Rafters = 6 lb/ft, (3) Beam = 20 lb/ft • Roof pitch: 5:12 %3! Please round to the nearest one tenth (i.e., 0.1). Total load (LL + DL) on a middle rafter after adjusting to horizontal projection = Ib/ft Reaction force for a middle rafter (one side) = Ib Reaction force for the Beam (one side) = lbSteel joists are manufactured in different series to account for which of the following? Spanning and loading Spanning None of the above Loading
- Gove a short description of the structures roller support and trussExample 3.15 FIGURE 3.32 Fink trusses spaced at 20 feet on centers support W6 x 12 purlins, as shown in Figure 3.32a. The purlins are supported at their midpoints by sag rods. Use A36 steel and design the sag rods and the tie rod at the ridge for the following service loads. Metal deck: Built-up roof: Snow: Purlin weight: 46.6' 2 @ 12' = 24' 4.679 k 46.6 18.17k (b) 2 psf 5 psf 45 18 psf of horizontal projection of the roof surface 12 pounds per foot (lb/ft) of length 112 42' 90' (a) P P 2@ 12' = 24' F R R 12 (c) 45 3' 3' 3' 3' 12' 4.679 k 4.679kWhich of the following best gives the purlin load wuy? See loaded purlin. The figure shown has trusses 6m apart with midpoint sag rods and Purlins C150x12.5 spaced 2.5m on center. The roof truss is inclined 1 vertical to 2 horizontal. The weight of roofing materials is 0.9 kPa (includes self wt.), wind load is 0.8 kPa perpendicular to the roof surface, minimum roof live load is 0.6 kPa. Consider the roofing to provide full lateral support of the purlins. F, = 345 mPa. Use the NSCP 2015 specifications. 2. 5m 2.5m 2. 5m roofing Wuy TRUSS TOP CHORD Truss Spacing = 6m Wux Purlins C150x12.5 Purlin Load Wt A kN/m mm^2 mm C150x12.5 0.12 11400 12.7 152 5.1 SECTION dtw by Ix Sx rx ly mm mm^4 mm^3 mm mm^4 mm^3 mm mm^3 mm^3 48 8.7 143 1100 112 48.4 378 65.2 1230 574 Sy ry Zx| Zy mm mm mm O 4.35 kN/m 5.56 kN/m O 25.02 kN.m
- UPVOTE WILLE BE GIVEN. OLEASE FOLLW THE INSTRUCTIONS. NO LONG EXPLANATION. PLEASE GIVE ATLEAST 3 DIFFERENT KIND OF TRUSSES WITH ITS SIMPLE, COMPOUND AND COMPLEX.F 3. Which of the following heavy timber frames must be buttressed or tied at the base to resist horizontal thrusts? a. Continuous girder b. Arch c. Truss d. Rigid frame or portal frame e. DomeA floor joist consists of a 2" x 10" No. 2 Southern Pine (Fa = 800 psi). The joists are spaced at 24" on center. The beam is subjected to a dead load of 20 lb/ft including beam weight and a live load of 60 lb/ft. If the length of the beam is 14 ft, determine the actual stress due to the loads on the beam, and if the section is adequate for the loads being carried.