Support base for equipment

Information

  • Patent Grant
  • 6663070
  • Patent Number
    6,663,070
  • Date Filed
    Tuesday, April 23, 2002
    22 years ago
  • Date Issued
    Tuesday, December 16, 2003
    20 years ago
Abstract
A support base for distributing a concentrated load over a contact surface is disclosed. The support base includes a body formed of moldable polymeric material having a top surface and a generally planar bottom surface. At least one recess is integrally formed in the top surface for receiving a support member. The support member transfers the concentrated load to the planar body. Furthermore, at least one through bore is provided in the support base, and the through bore extends from the top surface to the bottom surface of the support base for receiving a fastener. The through bore has a shaft portion and a relatively oversized cavity portion adjacent to the bottom surface for receiving fasteners such as nuts for securing bolts, as well as, bolt heads of different sizes and configurations. The support base has many advantages over the prior art for example, the base may be attached to different interface bracketry without be modified.
Description




TECHNICAL FIELD




The present invention relates to systems for supporting and hanging pipes and other loads on rooftops.




BACKGROUND ART




It is common in a commercial industrial environment to have various operating pipes, conduits, and other equipment positioned on and extending along the ground or over the tops of roofs. For example, these pipes and conduits may be connected to an air conditioning unit positioned on a building roof.




Frequently the pipes carry fluids which have operating temperatures fluctuating over a wide range. As the temperature of the fluids carried by the pipes changes the pipes will expand or contract accordingly. Typically, the pipes may expand and contract greatly. Therefore, the support for these pipes as they run over the ground and/or over a roof must sustain the pipe load but also must be sufficiently flexible to withstand the expansion and contraction caused by fluctuations in operating parameters and the prevailing weather.




On a building roof it was common practice for operating pipes to be supported by blocks of wood. The blocks are placed at intervals along the pipe track and fit between the roof surface and the pipes. Due to the large contact surface area between the blocks and a pipe the blocks are frequently moved as the pipes expand and contract. Over a period of time, the movement of the blocks against a roof surface damage the roof. This usually resulted in a leak and required expensive roof repair. One solution used to prevent block movement was to mechanically secure the block to the roof. However, mechanical attachment such as nailing the block to the roof has been shown to deteriorate in a relatively short time period. The blocks then break loose and a leak occurs at the attachment holes. Another alternative is to penetrate the roof with a vehicle post which is attached to the building structure Invariably the seal between the roof and the post will fail resulting in a leak.




In the roof environment, utilizing fixed bases would require holes to be placed in the roof surface. As discussed above, holes lead to leaks, a definite disadvantage of fixed bases. In general, fixed bases also lack flexibility for adjustment during set-up and use, and therefore are expensive to install.




Thus, a non-affixed base for supporting rooftop equipment has been developed in the prior art which includes a substantially flat bottom having a support structure rising from the base. The bases that have been developed typically have a plurality of recesses for attaching devices which interface and connect the pipe with the base. Some recesses generally have smooth walls, and other recesses have expensive threaded metal inserts for receiving fasteners. Although these prior art non-affixed bases fulfill their intended purpose, they are not easily adaptable for attaching a variety of load interfacing devices such as bolts and brackets having different threads, attachment requirements and corrosion resistance characteristics.




Therefore, a need exists for a new and improved non-fixed portable base for supporting pipes and other equipment and is reconfigurable for attaching a variety of interfacing bracketry and support devices thereto.




DISCLOSURE OF INVENTION




Accordingly, an object of the present invention is to provide a portable support base which may be reconfigured to receive a variety of pipe and other equipment support and interface bracketry.




In accordance with this and other objects, the present invention provides a support base for distributing a concentrated load over a contact surface. The support base includes a body formed of moldable polymeric material having a top surface and a generally planar bottom surface. At least one recess integrally formed in the top surface for receiving a support member wherein the support member transfers the concentrated load to the planar body. Furthermore, at least one through bore is provided in the support base, and the through bore extends from the top surface to the bottom surface of the support base for receiving a fastener. The through bore has a shaft portion and a relatively oversized cavity portion adjacent to the bottom surface for receiving fasteners such as nuts for securing bolts, as well as, bolt heads of different sizes, configurations and materials.




In accordance with another aspect of the present invention, a support base is provided for distributing a concentrated load. The support base has a body formed of moldable polymeric material having a top surface and a generally planar bottom surface. A recess is integrally formed in the top surface for receiving a support member wherein the support member transfers the concentrated load to the planar body. An inner pair of through bores extend from the top surface to the bottom surface for receiving a fastener. The inner pair of through bore having a shaft portion and a relatively oversized cavity portion adjacent to the bottom surface. An outer pair of through bores extend from the top surface to the bottom surface for receiving a fastener. The through bores have a shaft portion and a relatively oversized cavity portion adjacent to the bottom surface.




The above objects and other objects, features, and advantages of the present invention are readily apparent from the following detailed description of the best mode for carrying out the invention when taken in connection with the accompanying drawings.











BRIEF DESCRIPTION OF DRAWINGS





FIG. 1



a


is a perspective view of the support base according to the present invention illustrating the plurality of inner and outer apertures and the network of stiffening ridges;





FIG. 1



b


is a cross sectional view of the support base taken along line


1




b





1




b


through one of the-inner apertures, the central cavity, and one of the outer apertures, according to the present invention;





FIG. 1



c


is a cross sectional view of the support base through an outer aperture, according to the present invention;





FIG. 2

is a perspective view of a pipe supporting system, having a frame and yokes for supporting pipes, the system is further shown fixedly secured to the support base, according to the present invention;





FIG. 3



a


is a cross sectional view through the support base and post configuration of

FIG. 2

, according to the present invention;





FIG. 3



b


is a perspective view of an alternative attachment scheme for fixing a post to the support base, according to the present invention;





FIG. 4

is a perspective view of pipe support bracketry attached to the outer apertures of the support base for supporting a pipe, according to the present invention;





FIG. 5

is a perspective view of a platform fixedly attached to support bases for supporting equipment or providing a walkway over flat or inclined surfaces, according to the present invention;





FIG. 6

is a perspective view of a shock isolation device fixedly attached to a support base for preventing shock and vibration generated by equipment attached to the mounting surface of the isolation device from being transmitted to the surface upon which the support base is resting, according to the present invention;





FIG. 7

is a perspective view of an adjustable post apparatus fixedly attached to the support base for supporting and leveling equipment supported thereon, according to the present invention;





FIG. 8

is an exploded view of the adjustable post apparatus of

FIG. 7

for supporting and leveling equipment supported thereon, according to the present invention; and





FIG. 9

is an perspective view of post attachment bracketry for adapting the adjustable post apparatus of

FIG. 7

to pivot about the support base, according to the present invention.











BEST MODE FOR CARRYING OUT THE INVENTION




With reference to

FIG. 1



a


, there is shown a support base


10


for supporting a load and dispersing the load over a surface contact area. Generally, support base


10


has a network of ridges


12


which extend radially outward from a central cavity


16


. Radially extending ridges


12


serve to stiffen the support base


10


and prevent it from fracturing when a concentrated load is applied. Support base


10


further includes a plurality of inner apertures


14


. Inner apertures


14


are located generally adjacent to the inner cavity


16


and are configured to receive various load interfacing bracketry for interfacing the load with a support base


10


. The specific configurations of the inner apertures


14


will be described hereinafter. Additionally, support base


10


has outer apertures


18


which are disposed radially outward of inner cavity


16


. As with inner apertures


14


, outer apertures


18


are configured to receive interfacing bracketry which interface the load with support base


10


. Accordingly, the configuration of the outer apertures will be described in greater detail hereinafter.




Support base


10


may be comprised a variety of high strength low weight polymers with or without fillers or fiber reinforcement. A preferred low cost material is high density polyethylene. Moreover, the support base's overall weight


25


may be reduced by if desired introducing a gas into the injection molding process used to manufacture the support base. A preferred process for introducing the gas into the support base molding process is disclosed in U.S. Pat. No. 5,728,329 issued to Guergov and is hereby incorporated by reference. Introducing gas into the support base creates an internal void portion


19


(as shown in dotted outline in a portion of

FIG. 1



b


). Internal void portion


19


displaces the polymeric material in the core of the part thereby reducing the amount of material required to form the support base and the overall weight of the base without reducing strength. A support base made from the process referenced above has many advantages over the prior art, including but not limited to, reduction in manufacturing costs and weight, reduction in surface stresses, reduced manufacturing process cycle time and reduced in shrink, sink and warpage of molded support base.




Referring now to

FIG. 1



b


, a cross-section taken through inner cavity


16


, one of the inner apertures


14


, and one of the outer apertures


18


is shown, in accordance with the present invention. Inner apertures or through bores


14


includes a fastener shaft portion


30


and a fastener head portion


32


. Fastener shaft portion


30


has an upper end opening


34


which terminates at a top surface


20


of support base


10


. A lower end opening


36


of fastener shaft portion


30


is in communication with fastener head portion


32


. Accordingly, fastener head portion


32


has a lower end opening


38


which terminates at the bottom surface


22


of the support base


10


.




A conventional fastener


40


is shown threaded through inner aperture


14


. As shown, fastener


40


has a fastener head


42


which is positioned within the fastener head portion


32


of the inner aperture


14


. A shaft portion


44


of the fastener


40


is contained within the fastener shaft portion


30


of the inner aperture


14


. Fastener head


42


in one embodiment is unable to rotate within the inner aperture


14


because of the relatively small gap d between an outer surface


48


of the fastener head


42


and the inner surface


50


of the fastener head portion


32


. Gap d is dimensioned such that when a torque is applied to fastener


40


fastener head surface


48


contacts the inner surface


50


and prevents fastener


40


from rotating. A locking nut


52


may be turned onto fastener


40


for preventing relative axial movement of fastener


40


within inner aperture


14


.




Certainly other fasteners may be used in place of fastener


40


such as a conventional carriage bolt which has a squared off shaft portion which would be positioned within the fastener shaft portion


30


. The carriage bolt would have an interference fit with the fastener shaft portion which would prevent the carriage bolt from rotating. An alternative embodiment would include a fastener head portion


32


which is significantly larger-(oversized) than a fastener head. For example, gap d would be dimensioned sufficiently large enough to allow a tool such as a wrench socket to be placed over fastener head. The tool of course would be used to rotate the fastener head, to secure the fastener and associated bracketry to the support base.




A drain


54


is created in a wall of central cavity


16


to allow water or other fluids to seep out of the central cavity, as illustrated in

FIG. 1



b


. The drain prevents fluids especially water from accumulating in the central cavity. If water was allowed to accumulate in the central cavity the support posts received by the central cavity could rust and deteriorate. There are two paths by which water can exit the cavity: through the bottom of the support base and through the wall of the central cavity onto the top surface of the support base. Drain


54


is preferably formed in the support base by positioning an insert in the mold used to form the support base. The insert will create a void in the support base, preventing the polymeric material used to form the base from flowing into the area taken up by the insert.




Referring now to

FIG. 1



c


, a cross-section through outer apertures


18


is illustrated. Outer aperture


18


includes a fastener shaft portion


70


and a fastener shaft head portion


72


. Fastener portion


70


has an upper opening


74


which terminates at surface


20


of the support base. Shaft portion


70


has a lower end


76


which has an opening


79


which is co-terminus with the fastener head portion


72


. Fastener head portion


72


has a lower end opening


78


which terminates at the bottom surface


22


. Surface


20


is elevated above bottom surface


22


by a structural boss


80


which surrounds and strengthens outer aperture


18


.




With reference to

FIG. 2

, an embodiment of the present invention illustrating the use of the inner cavity


16


for supporting a rooftop or ground level pipe system is shown. A frame


100


having support posts


102


and


104


and a crossbar


108


are configured to transmit the load created by pipes


106


to the support base


10


. Pipes


106


are suspended from crossbar


108


which is connected to pipes


106


via threaded rods


110


and yokes


112


. One end of the threaded rod


110


is secured to the yoke


112


by washers


114


and nuts


116


, and the other end of threaded rod


110


is secured to the crossbar


108


with washers


114


and nuts


116


. A conventional pipe support roller


120


is secured through holes in yoke


112


by nuts


124


on threaded rod


126


. Threaded rod


126


securely retains pipe supported roller


120


while permitting free rotation thereof corresponding to movement of pipe


106


. It will be understood that nuts


116


on threaded rod


110


may be adjusted to raise or lower the roller


120


of the yoke


112


and thus adjust for beveling pipe


106


to equalize and distribute the pipe load throughout the pipe support system.




An embodiment of the present invention including an attachment scheme for securing post


102


to the support base


10


as illustrated in

FIG. 3



a


. A pair of L-brackets


200


may be securedly fixed to post


102


and to inner aperture


14


as shown. A fastener


212


is threaded through inner aperture


14


and through an L-bracket aperture


210


to secure L-bracket to the support base


10


. Of course, different fasteners


212


having different fastener head configurations may be used. A post fastener


216


is shown engaging a nut


214


for clamping L-bracket


200


to post


102


of the support base


10


. The post


102


may be attached to the base in at least two positions as denoted by the dotted line r and solid line f. Dotted line r signifies an attachment position for the post


102


where the post bottom


224


is elevated above surface


20


such that post bottom


224


does not engage cavity


16


. Since post bottom


224


is elevated above surface


20


such that post


102


is free to rotate about the base


10


and therefore may be fixed at any desired angle with respect to the base. This attachment scheme allows the post and base assembly to seek an angle of inclination of the surface on which they rest (as shown in FIG.


5


). Solid line f denotes the position of the post bottom


224


when it is fully engaged with cavity


16


. In this position post


102


is not allowed to rotate about base


10


and thus will be held in an upright fixed position.




With reference to

FIG. 3



b


an alternate attachment scheme for securing support post


102


to support base


10


is illustrated. A base bracket


300


is attached via fasteners


302


threaded through inner apertures


14


, as previously discussed, to support base


10


. A threaded rod or bolt


310


is threaded through apertures


312


in base bracket


300


and in an intermediate bracket


314


to pivotally secure the intermediate bracket


314


to the base bracket


300


. Support post


102


is then attached to the intermediate bracket


314


with nuts and bolts


316


or the like as shown. This attachment scheme, as does the scheme in

FIG. 3



a


, allows post


102


to rotate about the support base through a 180° arc.




Referring now to

FIG. 4

, a load interface bracket


400


is shown for transmitting a load created by a pipe


402


to support base


10


. Interface bracketry


400


includes a pipe roller


404


and a pair of threaded rods


406


. Pipe roller


404


allows the pipe


402


to move laterally (as indicated by the arrows shown) to accommodate pipe contraction and expansion. Threaded rods


406


are threaded through outer apertures


18


and locked in place by locking nuts


408


. Pipe roller


404


may be positioned vertically above support base


10


by adjusting locking nuts


410


. Pipe roller locking nuts


412


are turned onto threaded rod


406


to secure the roller


404


and prevent vertical movement thereof. This pipe supporting scheme further illustrates an additional way to utilize the features of the present invention.




With reference now made to

FIG. 5

, a frame structure


500


is used to support a walkway, pipes, or other equipment over an inclined surface


504


. The bracketry shown in

FIGS. 3



a


and


3




b


may be utilized to accommodate the angle of the inclined surface


504


. The frame structure


500


may be used to support equipment such as telephone switches or air conditioners or alternatively used to support a platform


506


over which a walkway may be constructed. The support base


10


seeks the angle of inclination of the inclined surface so that the support posts


102


are plum and the frame structure and platform is level with the ground.





FIG. 6

shows an isolation device


600


which may be used with the support base


10


of the present invention. Isolation device


600


has a mounting surface


602


upon which post


102


may be securedly attached. For example, post


102


may be secured to surface


602


via the L-brackets shown in

FIG. 3



a


. Attachment notches


604


are disposed on each side of an attachment frame


603


of isolation device


600


for securedly fixing the device to the inner apertures


14


as conventionally known (with bolts, screws, etc.). A shock and vibration absorber


606


such as a spring isolates the mounting surface


602


from the attachment frame


603


. The stiffness of the absorber may be regulated using a set- screw


608


. Tightening the set- screw


608


reduces vertical movement and limits bounce. Additionally, a neoprene insert


609


is disposed between a side wall of the mounting surface


602


and a side wall of the attachment frame


603


to dampen shock and vibration in the horizontal direction. A snubber screw


610


is provided to limit the amount of motion in the horizontal direction. Tightening the snubber screw


610


reduces movement and limits bounce and also controls rock. Wear of the neoprene material is negligible as damping is provided by viscous-distortion of the neoprene inserts. The above-described isolation device and support base combination provides a means to prevent shock and vibration generated by equipment, such as, motors attached to surface


602


from being transmitted to a surface the support base


10


is resting on.




Reference is now made to

FIGS. 7 through 9

wherein an adjustable post


700


and support base


10


are illustrated, according to the present invention.

FIG. 7

shows the adjustable post


700


secured at one end to the support base


10


with conventional fasteners. The other end of the adjustable post


700


has a support tray


702


fixedly secured thereon by similar means. A load is received by support tray


702


such as a roof top air conditioning unit. Support tray


702


is slidably received within a fixed post


705


and attached thereto. Fixed post


705


has a longitudinal body with a C-shaped cross section, four sides and a plurality of attachment apertures on each of the four sides.




A coupler plate


710


is attached to the fixed post


705


for joining a cross brace


712


to adjustable post


700


. As readily apparent the cross brace


712


is used to secure two adjustable posts together. An adjustment screw


706


is disposed between the fixed post


705


and the attachment block


708


and may be turned into or out of the attachment block to lower or raise the adjustable post


700


, respectively.




An exploded view of the adjustable post


700


is illustrated in FIG.


8


. The adjustable post


700


is comprised of four main segments: the tray


702


having a locking block


704


integral thereto, fixed post


705


having a plurality of attachment apertures, an adjustment screw


706


having a fixed cylindrical end


818


, collar


819


having a pair of flats


821


and a threaded end


816


, and attachment block


708


having a threaded aperture


810


and attachment eyelets


800


. The adjustable post is assembled by attaching the tray


702


to the fixed post


705


with fasteners then fastening the fixed post to the fixed cylindrical end


818


of the adjustable screw


706


with fasteners such as nuts


822


and bolts


820


. A locking nut


812


is threaded onto threaded portion


816


, and then threaded portion


816


is turned into threaded aperture


810


of attachment block


708


. The attachment block may be secured to a base, such as base


10


, using fasteners threaded through attachment eyelets


800


and into the base, as shown in FIG.


7


. With bolts


820


removed a user can adjust the height of post


700


by turning adjusted screw


706


using a wrench engaging flats


821


.




An alternative attachment block


900


and attachment bracket


906


, as illustrated in

FIG. 9

, may be used with the adjustable post


700


for use on inclined surfaces such as shown in FIG.


5


. In practice threaded end


816


would be turned into threaded aperture


902


and a fastener would be threaded through apertures


904


and


908


to pivotally secure attachment block


900


to attachment bracket


906


. The entire assembly may be secured to a support base using fasteners through apertures


910


and inner apertures


14


of the support base, as previously shown and described.




While embodiments of the invention have been illustrated and described, it is not intended that these embodiments illustrate and describe all possible forms of the invention. Rather, the words used in the specification are words of description rather than limitation, and it is understood that various changes may be made without departing from the spirit and scope of the invention.



Claims
  • 1. A device for adjusting a height of a load supported upon a plurality of base members, the device comprising:a support base for distributing a concentrated load, the support base including: a body formed of moldable polymeric material having a top surface and a generally planar bottom surface, at least one recess integrally formed in the top surface for receiving a support member wherein the support member transfers the concentrated load to the planar body, and at least one through bore extending from the top surface to the bottom surface for receiving a fastener, the through bore having a shaft portion and a relatively oversized cavity portion adjacent to the bottom surface; a support post having a generally square cross-section, an upper end, a lower end and an internal cavity; an adjustment screw including: a cylindrical end having a diameter dimensioned to fit within the internal cavity for removable attachment thereto, a threaded bolt end, and a collar portion disposed between the cylindrical end and the threaded bolt end, the collar portion being sufficiently larger than the cylindrical diameter to prevent the support post from sliding over the collar portion; and an attachment block for securing the support post to the support base, the attachment block having a threaded aperture for receiving the threaded bolt end; wherein the adjustment screw may be turned into the threaded aperture to change the height of the support post.
  • 2. The device of claim 1 wherein the attachment block includes a rotatable attachment block portion pivotally fixed to an attachment bracket portion for rotating the support post about the support base.
  • 3. The device of claim 1 wherein the collar portion further comprises a pair of diametrically opposed flats to allow gripping engagement of a tool for rotating the adjustment screw.
  • 4. The device of claim 1 further comprising an isolation device affixed to the support post and to the support base for preventing shock and vibration occurring in the load from being transmitted to the support base.
  • 5. The device of claim 1 further comprising a coupler plate for securing a cross brace to the support post for joining the support post to a member.
  • 6. A frame structure for supporting a load on a building rooftop, the frame structure comprising:a platform for supporting a load; at least four posts generally vertically extending between the platform and the building rooftop upon which the frame structure is mounted, each of the four posts having an upper end attached to the platform at spaced apart locations and a lower end adjacent the rooftop; and at least four support bases each cooperating with one of the at least four posts for distributing a concentrated load, each support base including: a body formed of moldable polymeric material having a top surface and a generally planar bottom surface, at least one recess integrally formed in the top surface for receiving a support member wherein the support member transfers the concentrated load to the planar body, and at least one through bore extending from the top surface to the bottom surface for receiving a fastener, the through bore having a shaft portion and a relatively oversized cavity portion adjacent to the bottom surface; wherein at least two of the at least four posts are telescopically adjustable to vary the post length in order to adjust the level of the platform relative to the rooftop, each of the at least two adjustable posts having a pair of cooperating threaded members, which when relatively rotated, cause the length of the post to gradually vary.
  • 7. The frame structure of claim 6 wherein the at least two telescopically adjustable posts each have an internal cavity, each of the at least two telescopically adjustable posts further comprising:an adjustment screw including: a cylindrical end having a diameter dimensioned to fit within the internal cavity for removable attachment thereto, a threaded bolt end, and a collar portion disposed between the cylindrical end and the threaded bolt end, the collar portion being sufficiently larger than the cylindrical diameter to prevent the post from sliding over the collar portion; and an attachment block for securing the post to the support base, the attachment block having a threaded aperture for receiving the threaded bolt end; wherein the adjustment screw may be turned into the threaded aperture to change the height of the post.
  • 8. The frame structure of claim 7 wherein each attachment block includes a rotatable attachment block portion pivotally fixed to an attachment bracket portion for rotating the post about the support base.
  • 9. The frame structure of claim 7 wherein each collar portion further comprises a pair of diametrically opposed flats to allow gripping engagement of a tool for rotating the adjustment screw.
  • 10. The frame structure of claim 7 further comprising an isolation device affixed to each post and the respective support base for preventing shock and vibration occurring in the load from being transmitted to the support base.
  • 11. The frame structure of claim 7 further comprising a coupler plate for securing a cross brace to one of the posts for joining the respective post to a member.
  • 12. A device for adjusting a height of a load supported upon a plurality of base members, the device comprising:a support base for distributing a concentrated load, the support base including: a body formed of moldable polymeric material having a top surface and a generally planar bottom surface, at least one recess integrally formed in the top surface for receiving a support member wherein the support member transfers the concentrated load to the planar body, and at least one through bore extending from the top surface to the bottom surface for receiving a fastener; a support post having a generally square cross-section, an upper end, a lower end and an internal cavity; an adjustment screw including: a cylindrical end having a diameter dimensioned to fit within the internal cavity for removable attachment thereto, a threaded bolt end, and a collar portion disposed between the cylindrical end and the threaded bolt end, the collar portion being sufficiently larger than the cylindrical diameter to prevent the support post from sliding over the collar portion; and an attachment block for securing the support post to the support base, the attachment block having a threaded aperture for receiving the threaded bolt end; wherein the adjustment screw may be turned into the threaded aperture to change the height of the support post.
  • 13. The device of claim 12 wherein the attachment block includes a rotatable attachment block portion pivotally fixed to an attachment bracket portion for rotating the support post about the support base.
  • 14. The device of claim 12 wherein the collar portion further comprises a pair of diametrically opposed flats to allow gripping engagement of a tool for rotating the adjustment screw.
  • 15. The device of claim 12 further comprising an isolation device affixed to the support post and to the support base for preventing shock and vibration occurring in the load from being transmitted to the support base.
  • 16. The device of claim 12 further comprising a coupler plate for securing a cross brace to the support post for joining the support post to a member.
  • 17. A frame structure for supporting a load on a building rooftop, the frame structure comprising:a platform for supporting a load; at least four posts generally vertically extending between the platform and the building rooftop upon which the frame structure is mounted, each of the four posts having an upper end attached to the platform at spaced apart locations and a lower end adjacent the rooftop; and at least four support bases each cooperating with one of the at least four posts for distributing a concentrated load, each support base including: a body formed of moldable polymeric material having a top surface and a generally planar bottom surface, at least one recess integrally formed in the top surface for receiving a support member wherein the support member transfers the concentrated load to the planar body, and at least one through bore extending from the top surface to the bottom surface for receiving a fastener; wherein at least two of the at least four posts are telescopically adjustable to vary the post length in order to adjust the level of the platform relative to the rooftop, each of the at least two adjustable posts having a pair of cooperating threaded members, which when relatively rotated, cause the length of the post to gradually vary.
  • 18. The frame structure of claim 17 wherein the at least two telescopically adjustable posts each have an internal cavity, each of the at least two telescopically adjustable posts further comprising:an adjustment screw including: a cylindrical end having a diameter dimensioned to fit within the internal cavity for removable attachment thereto, a threaded bolt end, and a collar portion disposed between the cylindrical end and the threaded bolt end, the collar portion being sufficiently larger than the cylindrical diameter to prevent the post from sliding over the collar portion; and an attachment block for securing the post to the support base, the attachment block having a threaded aperture for receiving the threaded bolt end; wherein the adjustment screw may be turned into the threaded aperture to change the height of the post.
  • 19. The frame structure of claim 18 wherein each attachment block includes a rotatable attachment block portion pivotally fixed to an attachment bracket portion for rotating the post about the support base.
  • 20. The frame structure of claim 18 wherein each collar portion further comprises a pair of diametrically opposed flats to allow gripping engagement of a tool for rotating the adjustment screw.
  • 21. The frame structure of claim 18 further comprising an isolation device affixed to each post and the respective support base for preventing shock and vibration occurring in the load from being transmitted to the support base.
  • 22. The frame structure of claim 18 further comprising a coupler plate for securing a cross brace to one of the posts for joining the respective post to a member.
Parent Case Info

This is a continuation of, application(s) Ser. No. 09/802,439 filed on Mar. 9, 2001 ABN which is a divisional application of Ser. No. 09/455,075 filed Dec. 6, 1999, which issued as U.S. Pat. No. 6,324,800 on Dec. 4, 2001.

US Referenced Citations (20)
Number Name Date Kind
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Continuations (1)
Number Date Country
Parent 09/802439 Mar 2001 US
Child 10/128078 US