on the 12 inch length of horizontal tube base 13 back ends of horizontal tubes 13 are slipped through square holes 59 from the front until they seat the back edge of forward leaning tube base 15 against the front edge of upstanding side of angle iron bar 58 and weldments 11 are then welded to angle iron bar 58 affixed to the top surface of the horizontal side of angle iron bar 58 just inside weldments 11 are two 1 u00bd inch square rearward leaning tube bases 17 approximately 6 inches long leaning rearward at an angle of approximately 15 degrees also optional leveling jacks 46 can be placed under the ends of angle iron bar 58 there are friction transport wheel brake assemblies 68 mounted at either end adjacent to axles 31 axle brace assembly 32 also includes bubble level 42 mounted in the center of angle iron bar 58 on the top of its horizontal side also mounted to the back surfaces of angle iron bar 58 are two pivotal ladder support brackets and pivot pins 70 that replace the standard pivoting feet on standard extension ladders these are shown in fig5 and in fig8 where a pivot pin is run through the normal mounting holes for standard ladder pivoting feet with various ladder angle set points alternatively conventional ladder feet could be left on a conventional extension ladder 56 and the ladder legs secured to angle iron bar 58 with standard u bolts 94 and leveling jacks 46 added under each end of angle iron bar 58 as shown in fig5 a transport wheels 22 are mounted on axles 31 that extend out from axle brace assembly 32 approximately 14.