Hanger insert for steel floor deck

• US 3,896,599 A
• Filed: 08/02/1973
• Issued: 07/29/1975
• Est. Priority Date: 12/30/1971
• Status: Expired due to Term

• Current Assignee: US Philips Corporation (Koninklijke Philips N.V.)
• Original Assignee: Frank A. Werstein, William R. Barnes
• Inventors: Werstein, Frank A., Barnes, William R.
• Primary Examiner(s): Abbott, Frank L.
• Assistant Examiner(s): Friedman, Carl D.
• Application Number:
  US05/384,968
• Time in Patent Office: 726 Days
• Field of Search: 52/39,699,698,700,701 85/5R 151/41.74,3
• US Class Current: 52/704
• CPC Class Codes: E04B 1/4157 Longitudinally-externally threaded elements extending from the concrete or masonry, e.g. anchoring bolt with embedded head

Abstract

An elongate bolt having a head at its upper end and a threaded lower end is mounted through a sheet steel member of a steel floor deck. The threaded lower end may comprise a stud formation or an interior threaded socket. The bolt is mounted in a hole drilled in the horizontal sheet steel member and is held in place by a thin flexible sheath member engaging the bolt below the sheet of steel and a flat leaf spring engaging the upper surface of the sheet of steel. When concrete is poured on the upper surface of the horizontal sheet steel member and set, it will embed the upper portion of the bolt which may have additional structural means to increase the embedded area. Prior to pouring, however, the upper portion of the bolt is yieldable by reason of the flat leaf spring but recoverable to a position perpendicular to the plane of the sheet steel member.

Claims

1. A hanger insert for installation in decking including a layer of concrete and a sheet member supporting the concrete prior to its being poured, the insert comprising:

A. an elongate metal member having a bottom end and a top end with stop means located therebetween, B. means for supporting said elongate metal member in a disposition passing through a hole in a sheet member which is adapted to have concrete poured onto the upper surface of the sheet member, with the bottom portion of the elongate metal member protruding below the sheet member and the top portion of the elongate metal member protruding above the sheet member, C. said elongate metal member including structure to enable thE securement of a structural member from the bottom portion thereof which structural member is adapted to depend from the decking to be formed, and D. a leaf spring formed of flat spring stock bowed about a central area and loosely mounted through said central area on said elongate member to have its concave surface facing the lower portion of the elongate member, said leaf spring being held between the stop means on said elongate member and the upper surface of said sheet member, said leaf spring providing a yieldable connection between said hanger insert and sheet member prior to the setting of said concrete and enabling the hanger insert to absorb the shock attendent upon the influx of fluid concrete and to restore the elongate metal member to an erect position before the concrete sets.

2. The hanger insert as claimed in claim 1, in which said stop means comprise a formation on said upper portion integral with said elongate metal member, said leaf spring has a central opening in which said elongate metal member engages, and said formation is larger than said opening.

3. The hanger insert as claimed in claim 1, in which the elongate metal member is a threaded bolt, the leaf spring has a central opening in which said bolt is engaged, and the stop member is a nut, the structure to enable securement comprising the bottom threaded end of said bolt.

4. The hanger insert as claimed in claim 1, in which the upper end of said elongate metal member comprises an enlarged structure to provide embedment area greater than the cross-sectional area of said elongate metal member.

5. The hanger insert as claimed in claim 1, in which the means for supporting the elongate member include a sleevelike sheet metal member secured on said lower portion and adapted to engage the bottom surface of said sheet member and clamp same between said leaf spring and itself.

6. The hanger insert as claimed in claim 5, in which the ends of the leaf spring are turned slightly toward the upper portion of the elongate member.

7. A hanger insert for installation in decking including a layer of concrete and a sheet member supporting the concrete prior to its being poured, and said insert comprising:

A. an elongate metal member having a bottom end and a top end, B. means for supporting said elongate metal member in a disposition passing through a hole in a sheet member which is adapted to have concrete poured onto the upper surface of the sheet member, with the bottom portion of the elongate metal member protruding below the sheet member and the top portion of the elongate metal member protruding above the sheet member, C. said elongate metal member including structure to enable the securement of a structural member from the bottom portion thereof which structural member is adapted to depend from the decking to be formed, D. a leaf spring formed of flat spring stock bowed about a central area and loosely mounted through said central area on said elongate member to have its concave surface facing the lower portion of the elongate member, said bowed portion being lockable between the stop means on said elongate member and the upper surface of said sheet member to provide a yieldable connection between said hanger insert and sheet member prior to the setting of said concrete, said elongate member having stop means establishing the location of mounting said leaf spring thereon, and E. said supporting means including a hollow sheath member telescopically engaged with said elongate metal member along a portion of the length thereof, the sheath member being adapted to be inserted through a predrilled hole in said sheet member of a size to accommodate said sheath member, the sheath member having means at the upper end thereof adapted resiliently to engage within the hole of said sheet member to resist the sheath member'"'"''"'"'s passing through or being pulled from said sheet member while at the same time providing a yieldable connection therewith, and the lower end of the sheath member being constructed to provide across to the bottom end of the elongate metal member after the concrete has been poured and set.

8. The hanger insert as claimed in claim 7, in which the said sheath member and elongate metal member have cooperating means limiting the extent to which the elongate member is telescopically insertable into the sheath member.

9. The hanger insert as claimed in claim 7, in which said sheath member is of elastomeric material.

10. The hanger insert as claimed in claim 7, in which the sheath member is made of sheet metal, and the means at the upper end thereof comprise an overhang adapted to engage the upper surface of the sheet member and means spaced below said overhang adapted resiliently to engage with said sheet member on the lower surface thereof.

11. The hanger insert as claimed in claim 10, in which said means adapted resiliently to engage said sheet member comprises a set of fingers circumferentially arranged around the sheath member and having a given spacing from the overhang thereof whereby when inserted through said predrilled hole the fingers will be depressed and will then spring outwardly after passing through said hole whereby to sandwich the sheet member between said overhang and said fingers.

12. The hanger insert as claimed in claim 9, in which the means at the upper end of the sheath member comprise groove means formed in the exterior surface thereof.

13. The hanger insert as claimed in claim 12, in which the sheath member is tapered and the groove means are of increasing diameter along the length thereof.

14. A hanger insert for installation in decking including a layer of concrete and a sheet member supporting the concrete prior to its being poured, the insert comprising:

A. an elongate metal member having a bottom end and a top end, B. means for supporting said elongate metal member in a disposition passing through a hole in a sheet member which is adapted to have concrete poured onto the upper surface of the sheet member, with the bottom portion of the elongate metal member protruding below the sheet member and the top portion of the elongate metal member protruding above the sheet member, C. said elongate metal member including structure to enable the securement of a structural member from the bottom portion thereof which structural member is adapted to depend from the decking to be formed, D. a leaf spring formed of flat spring stock bowed about a central area and loosely mounted through said central area on said elongate member to have its concave surface facing the lower portion of the elongate member, said bowed portion being lockable between the stop means on said elongate member and the upper surface of said sheet member to provide a yieldable connection between said hanger insert and sheet member prior to the setting of said concrete, said elongate member having stop means establishing the location of mounting said leaf spring thereon, E. the means for supporting the elongate member including a sleevelike sheet metal member secured on said lower portion and adapted to engage the bottom surface of said sheet member and clamp same between said leaf spring and itself, F. the bottom portion of said elongate member is threaded and the sleevelike sheet metal member has thread-engaging tangs screwed onto said threaded end, and G. the sleevelike sheet metal member having flared resilient ears, capable of contracting while said sleevelike sheet metal member is forced through the hole in said sheet member and recovering thereafter.

15. The hanger insert as claimed in claim 14, in which the position of the stop means is adjustable.

16. A hanger insert for installation in sheet steel decking comprising:

A. a boltlike member having a headed portion at one end and means for securement of a structural member at the other end, B. a flat bowed leaf spring having a central passageway between outer bowed ends, the bolt-like member bEing engaged in the passageway, the bow being concave toward said other end, C. stop means limiting movement of the spring along the central passageway toward said one end, and D. sleevelike means attached to said other end for mounting said boltlike member in a hole in a horizontal member of sheet steel with the bow ends of the leaf spring engaging the top of said horizontal member and the boltlike member making a yieldable but recoverable connection with said horizontal member.

17. The hanger insert as claimed in claim 16, in which the sleevelike means comprises a tapered, molded, elastomeric sleeve having exterior annular groove means at its upper end of different sizes.

18. The hanger insert as claimed in claim 16, in which the sleevelike means comprises a sheet metal nut adapted to engage the bottom of said horizontal member.

19. The hanger insert as claimed in claim 18, in which the boltlike member is a threaded bolt and the securement means is the threaded end opposite said headed portion.

20. In combination with the sheet steel member of a steel floor deck, a hanger insert engaged in a predrilled hole in said sheet steel member with a part of the insert disposed above the sheet steel member and other part of the insert disposed below the sheet steel member, said insert comprising:

A. an elongate cylindrical member of metal having an upper portion and a lower portion, the upper portion having a head adapted to be embedded in concrete poured on the upper surface of said sheet steel member, the lower portion having a formation to enable the securement of a structural member thereto depending from the bottom of said sheet steel member, B. a flat leaf spring having a central connection with the upper portion of said cylindrical member and stop means limiting the movement of the spring toward said head, the spring being bowed concavely toward the lower portion with its ends engaging the upper surface of said sheet steel member, and C. a sleevelike sheet metal member secured to the lower portion in telescoping engagement and effective in cooperation with the spring to hold said cylindrical member in a yieldable but recoverable disposition normal to the plane of said sheet steel member.

21. The combination as claimed in claim 20, in which the distance between the stop means and sleevelike sheet metal member is such as to put the leaf spring under at least partial tension and the tension is adjustable.

22. The combination as claimed in claim 20, in which the cylindrical member is a threaded bolt, the stop means is a nut and the sleevelike member is a sheet metal nut.