Claims
- 1. An apparatus for erecting a structure at a site using pre-fabricated beams, comrpising:
- (a) a feed rigging in the associated work area of the structure, said feed rigging comprising:
- (i) a form for forming the pre-fabricated beams; and
- (ii) a support scaffolding operatively supporting said form;
- (b) means operatively connected to said support scaffolding for continuously equalizing flexure of said support scaffolding during concretizing of the pre-fabricated beams; and
- (c) means operatively proximate to said feed rigging for emplacing the pre-fabricated beams in their final position in the work area.
- 2. The apparatus in accordance with claim 1, wherein said equalizing means reduces a return spring force of said support scaffolding.
- 3. The apparatus in accordance with claim 1, wherein said equalizing means comprises a cantilevered member extending from said support scaffolding.
- 4. The apparatus in accordance with claim 3, wherein said cantilevered member comprises:
- (a) a first tank suitable for containing a ballast liquid; and
- (b) means for selectively changing the amount of said ballast liquid in said first tank during concretizing of the pre-fabricated beam.
- 5. The apparatus in accordance with claim 4, further comprising a second tank in fluid communication with said first tank, wherein said changing means comprises a pump for transferring said ballast liquid from said first tank to said second tank.
- 6. The apparatus in accordance with claim 1, wherein said form is heated and laterally tiltable.
- 7. The apparatus in accordance with claim 6, wherein said feed rigging further comprises an external vibrator fixedly attached to said form.
- 8. The apparatus in accordance with claim 7, wherein said pre-fabricated beams comprise top flanges and said form comprises a main part and a head piece removably joined thereto for forming the top flanges of the pre-fabricated beams.
- 9. The apparatus in accordance with claim 1, wherein said emplacing means comprises a pair of gantry cranes that are anchored on a plurality of support girders of a corresponding area of the structure.
- 10. The apparatus in accordance with claim 9, wherein each of said gantry cranes comprises:
- (a) a pair of supports;
- (b) a pair of feet operatively connected to said corresponding supports;
- (c) a trolley carrier in hinge-like suspension ahead of said supports; and
- (d) a trolley in operative contact with said trolley carrier.
- 11. The apparatus in accordance with claim 10, wherein said feet of each of said gantry cranes are telescopically extendable.
- 12. The apparatus in accordance with claim 11, wherein said trolley of each of said gantry cranes comprises an equalizing traverse, a hoist having a cable and a hook-type bottom block, wherein each of said gantry cranes comprises means for controlling said corresponding equalizing traverse comprising a displacement transducer in operative proximity to said corresponding cable.
- 13. The apparatus in accordance with claim 12, wherein said trolley of each of said gantry cranes further comprises a pendulum rod and said displacement transducer is suspended in pendulum fashion from said pendulum rod.
Priority Claims (1)
Number |
Date |
Country |
Kind |
3124038 |
Jun 1981 |
DEX |
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Parent Case Info
This is a division of application Ser. No. 389,083, filed June 16, 1982, now U.S. Pat. No. 4,497,153.
US Referenced Citations (1)
Number |
Name |
Date |
Kind |
3989218 |
Muller |
Nov 1976 |
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Divisions (1)
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Number |
Date |
Country |
Parent |
389083 |
Jun 1982 |
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