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The main loads acting on any bdding ate the vertical and the lateral loads. Lateral loads are induced mainly from the wind and the earthquakes and should be considered in the design of reinforced concrete structures, especially for high-rise buildings. Great modifications were introduced to the previous Egyptian code of practice for calculating loads and forces in structural and building works 1993, ECOP-93. The new Egyptian code ECOP-201, 2003 introduced the method of spectrum analysis for calculating seismic loads instead of the previous simplified method. In many cases effects of earthquakes are found to be dominant and more critical than wind effects. This depends on sonie factors defined by the codes. In this research the latest code is reviewed for wind and earthquake analysis and discussed to show all factors affecting the design. A computer program is developed to analyze the structural buildings subjected to wind pressure and the equivalent loads of earthquakes defined by the two Egyptian codes. Numerical examples are solved, analyzed discussed and compared for different factors. The main conclusions are summarized. Y . .r LI .r . \ J, S $I+JI JLI, L;U~ ~ Y I j 4 1 1 , ~ Y I a 4 1 jh! + ;+ j,j J*, LX 5 199r ?LJ JLYl ?LJ ~ L I I 2 4 4 ;iJw4 L J . ~ id+j LZ_II.I~&\~ @YI ofill 433 &I cuJl J J J ~ ) ~ .JjYjll J L i +LC. @ , +A L& & JjYjll j cLJI $i; +L, $ -1 63.11 3?jJ &Iu &+!I I h $ ,A d j .i&j i~Jh4 &dl & UKdl Gal qJ1 WW jib &i2 Jas + LS ajSU tij c ~ W I ~ 4 4 JjYjnj cWI & W J& j l d El/+ 0. dJL & L!& + + JjYjllj c ~ J 1 3. iJ& dy && i)j+ L;Y UL ObliiJ4 &A L!& + LA . +I 1 filijIBII &j &LA 04L; yJ p; d, & i l l &4WI $ i i W l aLa gi 4, A\ &I ;-;$I c%Ldl& $+ l I~~J j l l& &llj JjYjll J cLJU $91 $MI W dj$ $1 ~ Y l r l l e~jj ajltl] iYY;.j, a@'+ +U'+ 41 A$& JjY$ @W $ ;&I ;~Ldl i, &Uj +I j &#I

COMPARISON BETWEEN THE DESIGN LATERAL LOADS ON R.C. HIGH RISE BUILDINGS ACCORDING TO THE RECENT EGYPTIAN CODES