Structural Engineering & Construction Situation 33 (PH)

[@eribertotorresjr152]

Thaank you sir ! More blessings pa po sa iyo!

[@mohammadsumusod1850]

Goodmorning engr. hindi po ba force BC sana yung sa crane ? Bat po naging force AB ?

[@cebox]

Erroneuos po kasi yung problem na yan, na yung BC, ginawa niya rin pong AB, kasi yung position po pala ng A, is dapat C, at yung C is yung A dapat. Kaya medyo magulo po yan. But, if we will check the problem, wala pong sense kung kukunin natin ang W in terms AB based sa drawing, kasi distance lang po ang AB. Compare to AB na nasa crane mismo based sa solution namin, mas may sense po iyon. (Sorry for the very late reply. Naging abala na po sa work stuff and pagaasikaso ng aming CE Box Merchandise: tinyurl.com/ynw9u6jd).

[@jcquints3364]

good day po. wala po bang bearing yung term na lifted sa 1st part ng question? thank you po

[@cebox]

Actually, pinagiisipan din namin yan e. Pero if lifted ang usapan, meaning lang naman nun is iaangat ang W, bubuhatin ang W, pero still nasa Statics pa rin. Sa reference, nagstatics pa rin siya kasi Summ. of Forces Vertical ginawa niya sa AC, BC, at W. Pero difference lang, inuna lang muna niyang kunin relationship ng AC at BC, pero tayo, agad equilibrium na in terms of AC and W. Kaya nakakalito lang din talaga yung solution na kukunin pa yung relationship ng AC at AB, lalo na kung AC at BC lang involved dun sa triangle. Kasi kapag force triangle ang usapan, 3 forces ang involved. Buf if dimension ang usapan sa AC and BC, pwede pa. Kaya confusing lang din talaga yung questions...

[@cebox]

Additionally, walang motion involved e, meaning hindi siya under dynamics, kaya statics lang talaga siya. Kaya hindi pa rin namin maexplain bakit need pa kunin relationship ng AC at BC muna, samantalang pwede namang magforce triangle agad at point C, or magmoment sa point B...

[@jcquints3364]

​@@cebox maraming salamat po!

[@marygenieveoquendo6236]

Sir yung sa CE ref Vol 5 naging 13^2 = 12^2 + 5^2 diko alam san nakuha yung value nayun

[@cebox]

Hindi po ba yan slope?

[@raineticzon2178]

Sir bkit naging 30-w(0.714)?... Where as yun nakuha Av is 30+w(0.714)..

[@cebox]

Downward po yung Av. Sa ∑Fv, sign is based on the direction of the force.

[@acmadh.rashid681]

Lods paano pag nakalagay sa choices c 2.06W at 1.457W? Alin po pipiliin namin?

[@cebox]

That answer came from the solution of other solution manual book, so we are not so sure na yan mismo ang nasa choices. But based on the solution kasi, mas convincing ang 1.457W…