US20070151199A1 - Joist noise reduction system and method of installation - Google Patents

Joist noise reduction system and method of installation Download PDF

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Publication number
US20070151199A1
US20070151199A1 US11/305,534 US30553405A US2007151199A1 US 20070151199 A1 US20070151199 A1 US 20070151199A1 US 30553405 A US30553405 A US 30553405A US 2007151199 A1 US2007151199 A1 US 2007151199A1
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US
United States
Prior art keywords
joist
sheath
side portions
end side
hanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US11/305,534
Inventor
David Karlen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
ROUNDA ENTERPRISES LLC
Original Assignee
ROUNDA ENTERPRISES LLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by ROUNDA ENTERPRISES LLC filed Critical ROUNDA ENTERPRISES LLC
Priority to US11/305,534 priority Critical patent/US20070151199A1/en
Assigned to ROUNDA ENTERPRISES, LLC reassignment ROUNDA ENTERPRISES, LLC ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: KARLEN, MR. DAVID PAUL
Priority to PCT/US2006/062048 priority patent/WO2007076283A2/en
Publication of US20070151199A1 publication Critical patent/US20070151199A1/en
Abandoned legal-status Critical Current

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    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B5/00—Floors; Floor construction with regard to insulation; Connections specially adapted therefor
    • E04B5/02—Load-carrying floor structures formed substantially of prefabricated units
    • E04B5/12—Load-carrying floor structures formed substantially of prefabricated units with wooden beams
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/18—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons
    • E04B1/26—Structures comprising elongated load-supporting parts, e.g. columns, girders, skeletons the supporting parts consisting of wood
    • E04B1/2604—Connections specially adapted therefor
    • E04B1/2612—Joist hangers
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04B—GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS
    • E04B1/00—Constructions in general; Structures which are not restricted either to walls, e.g. partitions, or floors or ceilings or roofs
    • E04B1/62—Insulation or other protection; Elements or use of specified material therefor
    • E04B1/74—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls
    • E04B1/82—Heat, sound or noise insulation, absorption, or reflection; Other building methods affording favourable thermal or acoustical conditions, e.g. accumulating of heat within walls specifically with respect to sound only
    • E04B2001/8254—Soundproof supporting of building elements, e.g. stairs, floor slabs or beams, on a structure

Definitions

  • This disclosure relates to structural joist systems and more particularly to reducing noise in structural joist systems at the joist-joist hanger interface.
  • One source of squeaky floors is a poor connection between a floor joist and a joist hanger. If the joist is improperly fit into the joist hanger, the fit between the two may loosen up over time and use causing the joist to rub up and down against the joist hanger when loads are applied, thereby causing a squeak.
  • FIG. 1 shows composite I-beam joist 20 inserted into joist hanger 22 with the adhesive 24 depicted as oozing up and over the bottom flange 26 of the joist 20 .
  • This tendency to over-apply the adhesive may be due to a desire to make sure enough adhesive will hold the joist in the hanger over a long period of time. This need to hold the joist in the hanger is important because many “squeak-free” floor systems come with an extended warranty against any future squeaks.
  • the adhesive is messy, smelly, and depending on the type of adhesive used, highly flammable. Also, adhesives will out-gas chemicals over a period of time that may last until well after the floor is installed. Further, if repairs are needed to be made for any reason at the joist hanger interface, the adhesive must be painstakingly chipped away and the joist and joist hanger may even need to be completely scrapped.
  • a noise reducing joist system includes a joist hanger, a joist and a sheath surrounding a bottom portion, a lower end portion and lower end side portions of the joist, the sheath and joist inserted into the joist hanger. The joist and sheath are inserted into the joist hanger.
  • the system is installed by a method where the joist hanger is installed and the sheath is fitted onto the joist to surround over a bottom portion, a lower end portion and lower end side portions of the joist. The joist and sheath are then inserted into the joist hanger.
  • FIG. 1 is a perspective view of a current joist hanging system showing adhesive applied to the joist.
  • FIG. 2 is a perspective view of a joist hanging system.
  • FIG. 3 is a cross-sectional view of the joist hanging system of FIG. 2 taken along line 3 - 3 in FIG. 2 .
  • FIG. 4 is a cross-sectional view of the joist hanging system of FIG. 2 taken along line 4 - 4 in FIG. 2 .
  • this disclosure describes using a plastic sheath fit over the bottom end of the joist and interposed between the joist and the joist hanger.
  • the plastic sheath allows for the expected loosening of the interface between the joist and joist hanger due to repeated loading. Any loosening now results in a sliding between the joist and the plastic sheath or between the sheath and the joist hanger which produces far less noise than a sliding between the joist and the joist hanger.
  • the sheath allows for easy removal in case any repairs must be made at the joist hanger without needing to remove adhesive or scrap the joist or joist hanger.
  • FIG. 2 is a perspective view of the joist hanging system 30 .
  • a bottom portion 32 , lower end portion 34 shown in FIG. 3 and lower end side portions 36 of a joist 38 are surrounded by a removable sheath 40 .
  • the sheath 40 and joist 38 are inserted into the joist hanger 42 .
  • the sheath 40 may be made from a plastic, though other materials that provide a quiet sliding interface may also be used to make the sheath.
  • plastic it may be made from an injection molded plastic and/or fire resistant plastic.
  • the joist 38 is shown in FIG. 2 as being a composite I-beam joist typically used in squeak-free flooring applications.
  • the system 30 may be used with other types of joists that utilize joist hangers.
  • FIG. 3 is a cross-sectional view of a portion of the joist hanging system 30 taken along line 3 - 3 in FIG. 2 .
  • the sheath 40 is rectangular in shape with an interior portion that is sized to receive the bottom flange 44 of the composite I-beam joist 38 .
  • the sheath covers a height 46 of the bottom flange 44 along the end side portions and the end of the bottom flange 44 . Covering the bottom flange along this areas ensures the only the sheath 40 will interface with the joist hanger. To make sure the bottom flange 44 is covered by the sheath 40 , the sheath 40 may extend above the height 46 of the bottom flange 38 .
  • FIG. 4 is a cross-sectional view of a portion of the joist hanging system 30 taken along line 4 - 4 in FIG. 2 .
  • the removable sheath 40 has an interior width 48 and the bottom flange 38 has a width 50 .
  • the interior width 48 of the sheath 40 may be less than the width 50 of the bottom flange 38 to form an interference fit between the sheath 40 and the bottom flange 38 .
  • the interior width 48 may be around 0.08 inches less than the bottom flange width 50 .
  • the joist hanger 42 is sized to have an interior width 52 to snugly receive the outer width 54 of the sheath 40 .
  • FIGS. 2-4 will now be used to help describe a method of installing a noise reducing joist system 30 .
  • the joist hanger 42 is installed at a required location.
  • the sheath 40 is placed over the bottom corner of the joist 38 so that the bottom portion 32 , lower end portion 34 and lower end side portions 36 are surrounded by the sheath 40 .
  • the joist 38 and sheath 40 are then inserted into the joist hanger 42 .
  • the joist 38 may be a composite I-beam joist typically used in “squeak-free” flooring systems with the sheath 40 surrounding the bottom portion 32 , end portion 34 and side portions 36 of the bottom flange 44 . Surrounding the bottom flange 44 may include covering a height 46 of the bottom flange 44 .
  • Surrounding the bottom flange 44 with the sheath 40 may include fitting the sheath 40 over the end portion of the bottom flange 44 with an interference fit.
  • Installing the joist hanger 42 may include installing a joist hanger that is sized to snugly receive an outer width 54 of the sheath 40 .

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Floor Finish (AREA)

Abstract

A noise reducing joist system includes a joist hanger, a joist and a sheath surrounding a bottom portion, a lower end portion and lower end side portions of the joist, the sheath and joist inserted into the joist hanger. The joist and sheath are inserted into the joist hanger. The sheath interfaces with the joist hanger rather than the joist thereby reducing noise that may be created by a sliding that might occur between the joist end the joist hanger.

Description

    TECHNICAL FIELD
  • This disclosure relates to structural joist systems and more particularly to reducing noise in structural joist systems at the joist-joist hanger interface.
    • BACKGROUND
  • One source of squeaky floors is a poor connection between a floor joist and a joist hanger. If the joist is improperly fit into the joist hanger, the fit between the two may loosen up over time and use causing the joist to rub up and down against the joist hanger when loads are applied, thereby causing a squeak.
  • Currently, composite I-beam joist manufacturers recommend applying an adhesive to the joist hanger before inserting the joist. While the manufacturers recommend using the adhesive sparingly, in reality, construction workers tend to apply more adhesive. FIG. 1 shows composite I-beam joist 20 inserted into joist hanger 22 with the adhesive 24 depicted as oozing up and over the bottom flange 26 of the joist 20. This tendency to over-apply the adhesive may be due to a desire to make sure enough adhesive will hold the joist in the hanger over a long period of time. This need to hold the joist in the hanger is important because many “squeak-free” floor systems come with an extended warranty against any future squeaks.
  • The adhesive is messy, smelly, and depending on the type of adhesive used, highly flammable. Also, adhesives will out-gas chemicals over a period of time that may last until well after the floor is installed. Further, if repairs are needed to be made for any reason at the joist hanger interface, the adhesive must be painstakingly chipped away and the joist and joist hanger may even need to be completely scrapped.
    • SUMMARY OF THE DISCLOSURE
  • A noise reducing joist system includes a joist hanger, a joist and a sheath surrounding a bottom portion, a lower end portion and lower end side portions of the joist, the sheath and joist inserted into the joist hanger. The joist and sheath are inserted into the joist hanger.
  • The system is installed by a method where the joist hanger is installed and the sheath is fitted onto the joist to surround over a bottom portion, a lower end portion and lower end side portions of the joist. The joist and sheath are then inserted into the joist hanger.
    • BRIEF DESCRIPTION OF THE DRAWINGS
  • FIG. 1 is a perspective view of a current joist hanging system showing adhesive applied to the joist.
  • FIG. 2 is a perspective view of a joist hanging system.
  • FIG. 3 is a cross-sectional view of the joist hanging system of FIG. 2 taken along line 3-3 in FIG. 2.
  • FIG. 4 is a cross-sectional view of the joist hanging system of FIG. 2 taken along line 4-4 in FIG. 2.
    • DETAILED DESCRIPTION
  • Instead of using adhesive to ensure a fixed, tight fit between a joist and a joist hanger, this disclosure describes using a plastic sheath fit over the bottom end of the joist and interposed between the joist and the joist hanger. Rather than trying to achieve a permanent fit, the plastic sheath allows for the expected loosening of the interface between the joist and joist hanger due to repeated loading. Any loosening now results in a sliding between the joist and the plastic sheath or between the sheath and the joist hanger which produces far less noise than a sliding between the joist and the joist hanger. Further, the sheath allows for easy removal in case any repairs must be made at the joist hanger without needing to remove adhesive or scrap the joist or joist hanger.
  • FIG. 2 is a perspective view of the joist hanging system 30. A bottom portion 32, lower end portion 34 shown in FIG. 3 and lower end side portions 36 of a joist 38 are surrounded by a removable sheath 40. The sheath 40 and joist 38 are inserted into the joist hanger 42.
  • The sheath 40 may be made from a plastic, though other materials that provide a quiet sliding interface may also be used to make the sheath. When the sheath 40 is made from plastic, it may be made from an injection molded plastic and/or fire resistant plastic.
  • The joist 38 is shown in FIG. 2 as being a composite I-beam joist typically used in squeak-free flooring applications. The system 30, however, may be used with other types of joists that utilize joist hangers.
  • FIG. 3 is a cross-sectional view of a portion of the joist hanging system 30 taken along line 3-3 in FIG. 2. The sheath 40 is rectangular in shape with an interior portion that is sized to receive the bottom flange 44 of the composite I-beam joist 38. The sheath covers a height 46 of the bottom flange 44 along the end side portions and the end of the bottom flange 44. Covering the bottom flange along this areas ensures the only the sheath 40 will interface with the joist hanger. To make sure the bottom flange 44 is covered by the sheath 40, the sheath 40 may extend above the height 46 of the bottom flange 38.
  • FIG. 4 is a cross-sectional view of a portion of the joist hanging system 30 taken along line 4-4 in FIG. 2. The removable sheath 40 has an interior width 48 and the bottom flange 38 has a width 50. The interior width 48 of the sheath 40 may be less than the width 50 of the bottom flange 38 to form an interference fit between the sheath 40 and the bottom flange 38. The interior width 48 may be around 0.08 inches less than the bottom flange width 50.
  • The joist hanger 42 is sized to have an interior width 52 to snugly receive the outer width 54 of the sheath 40.
  • FIGS. 2-4 will now be used to help describe a method of installing a noise reducing joist system 30. The joist hanger 42 is installed at a required location. The sheath 40 is placed over the bottom corner of the joist 38 so that the bottom portion 32, lower end portion 34 and lower end side portions 36 are surrounded by the sheath 40. The joist 38 and sheath 40 are then inserted into the joist hanger 42.
  • The joist 38 may be a composite I-beam joist typically used in “squeak-free” flooring systems with the sheath 40 surrounding the bottom portion 32, end portion 34 and side portions 36 of the bottom flange 44. Surrounding the bottom flange 44 may include covering a height 46 of the bottom flange 44.
  • Surrounding the bottom flange 44 with the sheath 40 may include fitting the sheath 40 over the end portion of the bottom flange 44 with an interference fit.
  • Installing the joist hanger 42 may include installing a joist hanger that is sized to snugly receive an outer width 54 of the sheath 40.

Claims (16)

1. A noise reducing joist system comprising:
a joist;
a joist hanger; and
a removable sheath surrounding a bottom portion, a lower end portion and lower end side portions of the joist, the sheath and joist inserted into the joist hanger.
2. The system of claim 1, wherein the removable sheath is comprised of a plastic.
3. The system of claim 2, wherein the removable sheath is comprised of an injection molded plastic.
4. The system of claim 2, wherein the removable sheath is comprised of a fire-resistant plastic.
5. The system of claim 1, wherein the joist is a composite I-beam.
6. The system of claim 5, wherein the removable sheath covers a height of a bottom flange of the composite I-beam along end side portions of the bottom flange and an end of the bottom flange.
7. The system of claim 6, wherein the removable sheath extends above the height of the bottom flange of the composite I-beam.
8. The system of claim 5, wherein an interior width of the removable sheath has a width less than a width of a bottom flange of the composite I-beam to form an interference fit between the removable sheath and the bottom flange of the composite I-beam.
9. The system of claim 1, wherein an opening in the joist hanger is sized to snugly receive an outer width of the sheath.
10. A method of installing a noise reducing joist system comprising:
installing a joist hanger;
surrounding a bottom portion, a lower end portion and lower end side portions of a joist with a sheath;
inserting the joist and sheath into the joist hanger.
11. The method of claim 10, wherein surrounding a bottom portion, a lower end portion and lower end side portions of a joist with a sheath includes surrounding a bottom portion, a lower end portion and lower end side portions of a joist with a plastic sheath.
12. The method of claim 11, wherein surrounding a bottom portion, a lower end portion and lower end side portions of a joist with a plastic sheath includes surrounding a bottom portion, a lower end portion and lower end side portions of a joist with a fire-resistant plastic sheath.
13. The method of claim 10, wherein surrounding a bottom portion, a lower end portion and lower end side portions of a joist with a sheath includes surrounding a bottom portion, a lower end portion and lower end side portions of a composite I-beam joist with a sheath.
14. The method of claim 13, wherein surrounding a bottom portion, a lower end portion and lower end side portions of a composite I-beam joist with a sheath includes covering a height of a bottom flange of the composite I-beam long end side portions of the bottom flange and an end of the bottom flange.
15. The method of claim 13, wherein surrounding a bottom portion, a lower end portion and lower end side portions of a composite I-beam joist with a sheath includes fitting the sheath over an end portion of a bottom flange of the composite I-beam with an interference fit.
16. The method of claim 13, wherein installing a joist hanger includes installing a joist hanger sized to snugly receive an outer width of the sheath.
US11/305,534 2005-12-16 2005-12-16 Joist noise reduction system and method of installation Abandoned US20070151199A1 (en)

Priority Applications (2)

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US11/305,534 US20070151199A1 (en) 2005-12-16 2005-12-16 Joist noise reduction system and method of installation
PCT/US2006/062048 WO2007076283A2 (en) 2005-12-16 2006-12-13 Joist noise reduction system and method of installation

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US11/305,534 US20070151199A1 (en) 2005-12-16 2005-12-16 Joist noise reduction system and method of installation

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2493005A (en) * 2011-07-21 2013-01-23 Illinois Tool Works Joist hanger with recesses and apertures to impede sound transmission

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102277905B (en) * 2011-05-05 2013-03-20 杨东佐 Beam hanging component, building frame structure and mounting method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892902A (en) * 1972-12-04 1975-07-01 Preco Ind Ltd Plastic panel pad construction for spacing concrete panels
US5403414A (en) * 1991-09-18 1995-04-04 Corston; Charles Method and apparatus for construction of flooring to prevent squeaks
US5497593A (en) * 1993-02-09 1996-03-12 Riesberg; James J. System for interlocking perpendicular members
US5927036A (en) * 1997-06-30 1999-07-27 Perf-X-Dek, L.L.C. Floor joist system
USD423325S (en) * 1999-04-27 2000-04-25 Steel Floors, Llc Joist ledger with tab
US6256958B1 (en) * 1997-06-30 2001-07-10 Perf-X-Dek, L.L.C. Floor joist system
US6457291B2 (en) * 1998-03-31 2002-10-01 Wick Building Systems, Inc. Floor frame structural support assembly and a method of making the same
US20020139621A1 (en) * 2000-07-17 2002-10-03 Masato Watabe Door and door hanger device at elevator landing
US20030009980A1 (en) * 2001-07-13 2003-01-16 George Shahnazarian Metal construction connectors
US6584745B1 (en) * 1999-04-20 2003-07-01 Nivell System Ab Floor construction comprising joists provided with level adjusting spacer screws, joists and spacer screws therefor
US6761005B1 (en) * 1998-11-25 2004-07-13 Dietrich Industries, Inc. Joist support member
US20070119108A1 (en) * 2005-11-14 2007-05-31 Downard Evan M End cap for wood frame construction

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3892902A (en) * 1972-12-04 1975-07-01 Preco Ind Ltd Plastic panel pad construction for spacing concrete panels
US5403414A (en) * 1991-09-18 1995-04-04 Corston; Charles Method and apparatus for construction of flooring to prevent squeaks
US5497593A (en) * 1993-02-09 1996-03-12 Riesberg; James J. System for interlocking perpendicular members
US6256958B1 (en) * 1997-06-30 2001-07-10 Perf-X-Dek, L.L.C. Floor joist system
US5927036A (en) * 1997-06-30 1999-07-27 Perf-X-Dek, L.L.C. Floor joist system
US6457291B2 (en) * 1998-03-31 2002-10-01 Wick Building Systems, Inc. Floor frame structural support assembly and a method of making the same
US6761005B1 (en) * 1998-11-25 2004-07-13 Dietrich Industries, Inc. Joist support member
US6584745B1 (en) * 1999-04-20 2003-07-01 Nivell System Ab Floor construction comprising joists provided with level adjusting spacer screws, joists and spacer screws therefor
USD423325S (en) * 1999-04-27 2000-04-25 Steel Floors, Llc Joist ledger with tab
US20020139621A1 (en) * 2000-07-17 2002-10-03 Masato Watabe Door and door hanger device at elevator landing
US6988592B2 (en) * 2000-07-17 2006-01-24 Kabushiki Kaisha Toshiba Door and door hanger device at elevator landing
US20030009980A1 (en) * 2001-07-13 2003-01-16 George Shahnazarian Metal construction connectors
US20070119108A1 (en) * 2005-11-14 2007-05-31 Downard Evan M End cap for wood frame construction

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2493005A (en) * 2011-07-21 2013-01-23 Illinois Tool Works Joist hanger with recesses and apertures to impede sound transmission
GB2493005B (en) * 2011-07-21 2017-02-22 Illinois Tool Works Acoustic hanger

Also Published As

Publication number Publication date
WO2007076283A3 (en) 2008-10-02
WO2007076283A2 (en) 2007-07-05

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AS Assignment

Owner name: ROUNDA ENTERPRISES, LLC, OREGON

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:KARLEN, MR. DAVID PAUL;REEL/FRAME:017393/0084

Effective date: 20051216

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION