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KHATRI INTERNATIONAL, INC. Page 7 of 14 <br />STRUCTURAL & CIVIL ENGINEERS 409 E. Civic Center Dr. <br />R.C.E. # 40833, SE #4391, GENERAL CONTRACTOR #B555505 Santa Ana, CA <br />6440 Sky Pointe Dr., #140-299, Las Vegas, NV 89131 July 1, 2025 <br />www.khatrinternational.com , dkhatri@aol.com <br />Tel. (626) 351-4830; FAX (702) 441-7356 <br />____________________________________________________________________________________________ <br /> <br />1. Loading <br />1.1 Existing Concrete Beam <br />Normal weight concrete = 150 pcf <br />Height = 21 inch <br />Width = 24 inch <br /> <br />1.2 Existing Concrete Slab <br />Normal weight concrete = 150 pcf <br />Thickness = 15 inch <br /> <br />1.3 Existing Loading per Floor Level <br />1.3.A – Level 1: <br />Dead Load = 10psf + WT of Slab = 10𝑝𝑠𝑓+(150𝑝𝑐𝑓 π‘₯ 15 π‘–π‘›π‘β„Ž <br />12π‘–π‘›π‘β„Ž <br />π‘“π‘œπ‘œπ‘‘ <br /> ) = 197.5psf <br />Live Load = 40psf <br /> <br />1.3.B – Level 2: <br />Dead Load = 15psf <br />Live Load = 40 psf <br /> <br />1.3.C – Level 3: <br />Dead Load = 15psf <br />Live Load = 40 psf <br /> <br />1.3.D – Roof Level: <br />Dead Load = 15psf <br />Live Load = 20 psf <br /> <br />1.4 LL Reduction <br /> 𝐿=πΏπΏβˆ—(0.25 +15 <br />βˆšπΎπΏπΏβˆ—π΄π‘‡ ) <br />𝐾𝐿𝐿=4 𝐴𝑇=648.6 𝑆𝑄.𝐹𝑇 <br />𝐿=πΏπΏβˆ—(0.25 +15 <br />√4βˆ—648.6 ) <br />𝐿=(0.25 +15 <br />√4βˆ—648.6)=0.544 =54% <br />Max reduction allowed is 40% when multiple floors are supported. <br />