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diff --git a/Machine_Design_by_U_C_Jindal/7-STRUTS_AND_COLUMNS.ipynb b/Machine_Design_by_U_C_Jindal/7-STRUTS_AND_COLUMNS.ipynb
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+{
+"cells": [
+ {
+		   "cell_type": "markdown",
+	   "metadata": {},
+	   "source": [
+       "# Chapter 7: STRUTS AND COLUMNS"
+	   ]
+	},
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.1: SC1.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-1\n",
+"clc;\n",
+"clear;\n",
+"sigc=550;\n",
+"FOS=4;\n",
+"sigw=sigc/FOS;\n",
+"l=4000;\n",
+"le=l/2;\n",
+"A=%pi*(1-0.7^2)/4;\n",
+"K=(1+0.7^2)/16;\n",
+"Pr=800*10^3;\n",
+"a=1/1600;\n",
+"D=130; //Rounding off to nearest whole number\n",
+"d=D*0.7;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('D is %0.1f mm     ',D);\n",
+"  printf('\n d is %0.1f mm     ',d);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.2: SC2.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-2\n",
+"clc;\n",
+"clear;\n",
+"l=500;\n",
+"E=70*10^3;\n",
+"P=20*10^3;\n",
+"FOS=2;\n",
+"d=P*2*12*4*l^2/((%pi)^2*E);\n",
+"d=(sqrt(8)*d)^0.25;\n",
+"b=d/sqrt(8);\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('d is %0.2f mm     ',d);\n",
+"  printf('\n b is %0.2f mm     ',b);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.3: SC3.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-3\n",
+"clc;\n",
+"clear;\n",
+"Ixx=(2*1696.6)+115.4;\n",
+"Iyy=1696.6+(2*115.4)+(2*25.27*10.27^2);\n",
+"A=3*25.27;\n",
+"Kmin=sqrt(Ixx/75.81);\n",
+"L=600;\n",
+"k=L/Kmin;\n",
+"sigc=110;\n",
+"c=1/200;\n",
+"sigw=sigc*(1-(c*k));\n",
+"Pw=sigw*A;\n",
+"a=1/7500;\n",
+"sigc1=320;\n",
+"Pr=(sigc1*A)/(1+(a*(L/Kmin)^2));\n",
+"FOS=Pr/Pw;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('FOS is %0.2f      ',FOS);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.4: SC4.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-4\n",
+"clc;\n",
+"clear;\n",
+"Iyy=193.4+(2*1.2*1.5^3/12);\n",
+"E=200*10^3;\n",
+"l=500;\n",
+"Pe=(%pi^2)*E*Iyy*10^5/(l^2);\n",
+"A=35.53+(2*1.2*15);\n",
+"sige=Pe/7530;\n",
+"k=sqrt(Iyy/A);\n",
+"xc=75;\n",
+"sig=80;\n",
+"sigo=20.875;\n",
+"A=A*100;\n",
+"P=sigo*A;\n",
+"P=P*10^-3;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('P is %0.1f kN     ',P);\n",
+"  \n",
+"  //The difference in the value of P is due to rounding-off the digits."
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.5: SC5.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-5\n",
+"clc;\n",
+"clear;\n",
+"sigc=330;\n",
+"a=1/7500;\n",
+"t=4;\n",
+"A=14.5*t^2;\n",
+"l=300;\n",
+"Kx=sqrt(1.4626*t^2);\n",
+"Pr=sigc*A/(1+(a*(l/Kx)^2));\n",
+"FOS=2;\n",
+"P=Pr/FOS*10^-3;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('P is %0.4f KN     ',P);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.6: SC6.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-6\n",
+"clc;\n",
+"clear;\n",
+"P=1500;\n",
+"FOS=2;\n",
+"Pd=FOS*P;\n",
+"l=280;\n",
+"E=207*10^3;\n",
+"I=Pd*l^2/(%pi^2*E);\n",
+"D=(64*I/(%pi*(1-0.8^4)))^(1/4);\n",
+"D=8;\n",
+"d=6.4;\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('D is %0.1f mm     ',D);\n",
+"  printf('\n d is %0.1f mm     ',d);"
+   ]
+   }
+,
+{
+		   "cell_type": "markdown",
+		   "metadata": {},
+		   "source": [
+			"## Example 7.7: SC7.sce"
+		   ]
+		  },
+  {
+"cell_type": "code",
+	   "execution_count": null,
+	   "metadata": {
+	    "collapsed": true
+	   },
+	   "outputs": [],
+"source": [
+"// sum 7-7\n",
+"clc;\n",
+"clear;\n",
+"D=500;\n",
+"p=0.3;\n",
+"E=208*10^3;\n",
+"sigc=320;\n",
+"a=1/7500;\n",
+"l=2000;\n",
+"le=l/2;\n",
+"W=%pi*D^2*p/4;\n",
+"FOS=4;\n",
+"Wd=W*FOS;\n",
+"I=Wd*l^2/(%pi^2*E);\n",
+"d=(64*I/%pi)^(1/4);\n",
+"A=%pi*d^2/4;\n",
+"k=d/4;\n",
+"d=45; //Rounding off to nearest whole number\n",
+"\n",
+"  // printing data in scilab o/p window\n",
+"  printf('d is %0.1f mm     ',d);"
+   ]
+   }
+],
+"metadata": {
+		  "kernelspec": {
+		   "display_name": "Scilab",
+		   "language": "scilab",
+		   "name": "scilab"
+		  },
+		  "language_info": {
+		   "file_extension": ".sce",
+		   "help_links": [
+			{
+			 "text": "MetaKernel Magics",
+			 "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md"
+			}
+		   ],
+		   "mimetype": "text/x-octave",
+		   "name": "scilab",
+		   "version": "0.7.1"
+		  }
+		 },
+		 "nbformat": 4,
+		 "nbformat_minor": 0
+}