Question

can you solve case No 2 please

A roof truss at the Home Depot® is to be designed. Each student is to determine the loading in each chord of the Pratt Truss using the Method of Joints and Purpose: Sections and to check your calculations using computer software. Directions: Each student is to complete and submit the requested information in the following order: 1. Cover page is to be typed and include: your name, project name, project number, case number, date due and date submitted. (0.5 points) 2. Exploded Free Body Diagram (FBD) showing all reactions and bar forces Label bar forces in tension (T) or compression (C). (0.5 points) 3. Calculate the reactions at points 1 and 8. Assume that the truss is simply supported with a pin at point 1 and a roller at point 8. Check using an independent equation. (1 point) 4. Calculate the bar forces. The calculations should be in a logical, organized format. A FBD must be drawn for each Joint and Section analyzed with a maximum of 2 Joints per page and a maximum of 1 Section per page shown. The following sections and joints must be analyzed for full credit: a. Method of Joints. Show calculations for joints 1, 2, 5, 6, 8 (ΣFx-0 and ΣFy-0) (4 points) b. Method of Sections: Show calculations for sections 1-1 and 2-2 (2 points) Check: with joint 4 (J point) c. 5. MDSolids Computer Solution Printout. Using the computer program "MDSolids," determine the individual bar forces for each truss member. The computer program can be downloaded for FREE at http://www.mdsolids.com/download.htm. The version of MDSolids that you download from this site may be used free-of-charge for a 30-day evaluation period. (1 point) RUSSI DJEC CASE NO. TRUSS HEIGHT PANEL WIDTH VERTICAL | LOCATION OF LOAD (kips) APPLIED LOAD 6-0 7-0 8-0* 9-0 10'-0" 6-0 7-0 8-0* 9-0 10'-0" 8-0 9-0 10'-0" 10 10 10 10 10 20 20 20 20 20 2 &7 3 & 6 4 & 3 4 &7 5 & 6 4 & 6 2 &5 4 & 3 4 & 7 5 & 6 12'-0" 8-0 9-0 10-0" 10 12'-0" PRATT 1RUSS

Answer 1

Given- Russ height-g', Panel cuidth 0 2 2 ー オープーーオーク 172,S, G, gニMethod of Joints Seeh on D-O and ②-2-method of sect on Solution Suppost Readtions R8 = 10 kps method of Join Ls 13 -. -12-67 Sin S2.3
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Joint 2 23 7.77 2 F247.77 Kips (T) Joint tan 02-52-13 02 8 6 10-12 67 Kips Sins2.B lo P86 --(-12-67 x cos S2 B) 67 7.77 FGu4 lo F647.77 kips (T) 3 method of seation des seein and Left port Dotw F.8.D To Find F3S, EM4-o F3sx -70x14 Fa, Fo 3o-14 tan32-13

25:32 707,78 Kips CT) CCheck) To nd, Fys, Em40 7S 64 6 7o 14 o tan o4 - To find, F74 7 -2S 32 9 X Cos S2.13 FG477.78 Kips CT) Cheek

Joint- s S3 Joint tan an 9 7 47 OS 47,77 2S 32 7.77 7 memberFostes Natune me Forte Natune (Kips) F4 7,77 T 13 12.67 Reaction atOSO R, lo KipS 23 7.77 2S 32 7.78 F. 2S 32 12167