in fig1 spacer rods or other spacer means are used to elevate the strut above the base rooftop support 80 of fig1 comprises base 82 strut 84 and spacer rods 86 the height of the spacer rods or other spacer means may be selected to provide the rooftop support with any desired total height thereby enabling a conduit to be supported at any desired height above the roof deck in another alternative embodiment of the invention illustrated in fig1 18 a sled member 90 can be affixed to base 12 of rooftop conduit support in order to provide a larger surface area to the base 12 in order to prevent damage to rubber roofing materials rubber roofing materials such as membranes applied to flat roofs can become soft on hot summer days especially in direct sunlight and sled member 90 distributes the load over a larger area of the roof sled 90 includes a flat panel 92 having a bottom side 93 and a top side 94 a peripheral wall 95 extends from the top side 94 around the entire periphery of the flat panel 92 a plurality of clamp arms 96 extend from the peripheral wall 95 as shown in fig1 clamp arms 96 include inward extending arms 97 that form a gap 98 between the panel 92 and the arms 97 sled 90 is preferably molded of.