of the access step 250 the retaining tab 263 is permanently attached to an upwards facing part of the inner portion 261 of the step bracket 260 the retaining tab 263 is rectangular when viewed from above and when viewed from the side it is c shaped to engage the flap 254 the engagement between the flap 254 and the retaining tab 263 is accomplished without the use of screws and rivets an outer edge 255 of the flap 254 slips horizontally into the retaining tab 264 the front side 252 of the access step 250 is attached to an outer portion 262 of the step bracket 260 by use of conventional screws 271 in use an assembly line worker first attaches the step brackets 260 to two tank straps 232 holding a fuel tank 234 to a frame rail 231 not shown then the worker will hold the access step 250 horizontally with the top surface 251 facing upwards the outer edge 255 of the flap 254 of the access step 250 is slipped into the retaining tab 263 to engage the rear side 253 to the inner portion 261 of each of the step brackets 260 the worker then uses the screws 271 to attach the front side 252 of the access step 250 to the outer portion 262 of the step brackets 260 a third embodiment of the invention is shown in fig7 and 9 fig7 shows an access step 350 attached to a step bracket 360 a second step bracket 360 is not shown but engaged to the access step 350 the same as the first the access step 350 is comprised of a top surface 351 a front side 352 and.