EngineeringPushan · Class 9-10
Building khadi kaise rehti hai? Load ka safar
Tumhari chhat ka saara wazan aakhir jaata kahan hai?
Socho pehle… phir dekho jawab
Wazan ek raaste se neeche utarta hai: slab se beam, beam se column (pillar), column se foundation, aur foundation se zameen. Is 'load path' mein koi bhi kadi kamzor hui, toh building khatre mein.
Engineer do tarah ka load ginte hain. Dead load — building ka apna wazan: deewar, slab, tiles. Live load — log, furniture, paani ki tanki, jo badalta rehta hai. Design isi hisaab se hota hai ki kitni manzil aur kitna saamaan sambhala jaa sakta hai.
Foundation chaudi kyun hoti hai? NCERT yaad karo: pressure = thrust / area. Utna hi wazan agar bade area par faile toh mitti par pressure kam padta hai aur woh dhansti nahin. Isliye pillar ke neeche chauda footing banta hai — jaise oont ke chaude pair ret mein nahin dhanste.
Ab socho, kisi ne purani building par bina design ke do manzil aur jod di. Dead load badh gaya, par pillar aur foundation wahi purane. Isiliye municipality se naksha (building plan) paas karwana aur structural engineer se check karwana formality nahin — jaan ka sawaal hai. Deewar mein badi daraar, jhukta pillar ya chhat se girta plaster — yeh warning signs hain.
Ghar pe try karo
A4 kaagaz ke 4 tube (cylinder) banao, tape se chipkao, aur khade karke unpar ek gatta rakho. Ab ek-ek karke kitaabein rakho. Kitni kitaabein tiki? Phir ek tube hata do aur dekho kya hota hai.
Wow!
Chaar patle kaagaz ke pillar bhi kitaabon ka dher utha lete hain — agar load seedha unke upar se neeche jaaye.
3 sawaal
- Foundation ko chauda banane ka main kaaran kya hai?
Jawab dekho
Wazan bade area par faila kar mitti par pressure kam karna. Pressure = thrust/area; area badhao toh pressure ghatta hai.
- Inmein se live load kaunsa hai?
Jawab dekho
Kamre mein baithe log aur furniture. Live load badalne wala wazan hai — log, saamaan; baaki building ka apna dead load hai.
- Chhat ka load zameen tak kis kram mein pahunchta hai?
Jawab dekho
Slab → beam → column → foundation → zameen. Yahi standard load path hai jis par framed building tiki hoti hai.
NCERT se jodo: NCERT Class 9 Science — force, thrust aur pressure