WO2006127280A2 - Structure de plancher composite acier-bois - Google Patents

Structure de plancher composite acier-bois Download PDF

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Publication number
WO2006127280A2
WO2006127280A2 PCT/US2006/018095 US2006018095W WO2006127280A2 WO 2006127280 A2 WO2006127280 A2 WO 2006127280A2 US 2006018095 W US2006018095 W US 2006018095W WO 2006127280 A2 WO2006127280 A2 WO 2006127280A2
Authority
WO
WIPO (PCT)
Prior art keywords
floor structure
channels
floor
structure according
wood
Prior art date
Application number
PCT/US2006/018095
Other languages
English (en)
Other versions
WO2006127280A3 (fr
Inventor
Joel Barker
Vincent B. Thomas
Kenneth J. Fridley
Robert Randall
William Steven Johnson
Original Assignee
Huber Engineered Woods 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 Huber Engineered Woods Llc filed Critical Huber Engineered Woods Llc
Publication of WO2006127280A2 publication Critical patent/WO2006127280A2/fr
Publication of WO2006127280A3 publication Critical patent/WO2006127280A3/fr

Links

Classifications

    • 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
    • E04B5/10—Load-carrying floor structures formed substantially of prefabricated units with metal beams or girders, e.g. with steel lattice girders
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04C—STRUCTURAL ELEMENTS; BUILDING MATERIALS
    • E04C2/00—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels
    • E04C2/30—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure
    • E04C2/34—Building elements of relatively thin form for the construction of parts of buildings, e.g. sheet materials, slabs, or panels characterised by the shape or structure composed of two or more spaced sheet-like parts

Definitions

  • a structural, weight-bearing floor system is constructed by laying a floor deck across a number of underlying, supporting joists or beam members.
  • the deck may be made of a variety of different materials, however generally the deck will be constructed of wood, such as wood panels set to lie across foundation walls or beam members, so as to replace the use of subfloor panels set upon underlying wood joists.
  • a number of factors are important, notably that the combination of the wood panels and underlying joists create a strong, stiff floor.
  • the floor should also have other important features, for example, it should be relatively easy to install as well as be capable of accommodating building services such as HVAC, plumbing, as well as fiber optics and other communication cables.
  • Yet another important factor that has been insufficiently addressed in past floor structures is that the floor structure should be compatible with potential floor coverings to be used over it.
  • Particularly desirable is a floor structure that is integrated as a single piece unit that can be lifted by a crane and installed in place. By preparing the floor in this manner, it needs only to be installed (rather than assembled) once it is delivered on site.
  • the floor does not have to be assembled on site, it can be manufactured in a plant, which allows greater realization of economies of scale, more rigorous quality control, and means that production of the floor structure is not interrupted by inhospitable weather. Accordingly, there is a need in the art for a floor structure that is integrated into a single unit capable of being prefabricated and mass produced.
  • Several prefabricated floor structures have been proposed in the past. For example, U. S. Patent No. 6,244,008 discloses a pre-assembled floor composed of layers of steel, insulation and cement.
  • the present invention includes a floor structure comprising: an upper surface arranged in parallel to a lower surface; and one or more channels disposed vertically between upper and lower surfaces and longitudinally extending along the upper and lower surfaces, each of the one or more channels having a top and a bottom.
  • wood is intended to mean a cellular structure, having cell walls composed of cellulose and hemicellulose fibers bonded together by lignin polymer.
  • laminated it is meant material composed of layers and bonded together using resin binders.
  • wood composite material or “wood composite component” it is meant a composite material that comprises wood and one or more other additives, such as adhesives or waxes.
  • wood composite materials include oriented strand board (“OSB”), laminated veneer lumber (LVL), oriented strand lumber (OSL), structural composite lumber (“SCL”), waferboard, particle board, chipboard, medium-density f ⁇ berboard, plywood, and boards that are a composite of strands and ply veneers.
  • OSB oriented strand board
  • LDL laminated veneer lumber
  • OSL oriented strand lumber
  • SCL structural composite lumber
  • waferboard particle board
  • chipboard chipboard
  • medium-density f ⁇ berboard plywood
  • the floor (for the first story), which supports a floor comprised of a series of parallel, spaced apart floor I joists, with a wood decking fastened upon them.
  • the floor is not built on site, but instead is built in floor structure segments elsewhere (such as in a manufacturing plant or similar facility) and transported to the construction site where it is lifted into place and installed by use of a crane during construction of a building.
  • the structural components of the floor system are combined in the unit, such that no floor joists are required to hold up the structure.
  • This floor structure has yet additional advantages as well because it is capable of accommodating the infrastructure to hold a variety of building services such as HVAC ducts, plumbing pipes, and conduits for fiber optic cables as well as other types of communication cables.
  • the configuration of the floor structure is illustrated in figure 1.
  • the floor structure 2 comprises an upper surface 5 arranged in parallel to a lower surface 8.
  • One or more channels 14 are disposed vertically between the upper surface 5 and lower surface 8 and these channels extend longitudinally along the length of the upper surface 5 and lower surface 8 as shown in Figure 1.
  • Each of the one or more channels have a top 17 (attached to the upper surface 5) and a bottom 20 (attached to the lower surface 8).
  • the upper surface 5 and lower surface 8 of the present invention will typically be constructed of one or more wood composite floor panels.
  • the entire top surface may be composed of one piece of OSB that is 20 feet long by 4 feet wide.
  • the bottom panel would also be one piece of the same length and width as the top surface. .
  • the wood composite is preferably OSB material, but known wood composite materials as mentioned above may be used also.
  • the wood composite boards which form the lower surface 8 can be made thinner than the wood composite boards which form the upper surface 5.
  • the wood composite boards which form the lower surface 5 have a thickness of about 3/8 inch to about 7/8 inch, preferably about 1/2 inch to about 23/32 inch, while the wood composite boards which form the upper surface 8 have a thickness of between 1/2 inch to about 1 inch, preferably about 19/32 inch to about 23/32 inch.
  • the present floor structure also includes one or more channels 14, which are meant to accommodate a variety of different building services such as HVAC equipment, telecommunication cables and wiring, plumbing and other important building services.
  • the channels have stiffeners 29 spot welded to the end of each channel, with holes formed in the stiffeners 29 to allow the passage of the cables, wiring, and plumbing along the length.
  • the channels may have formed openings in the sides to accommodate the passage of cables, wiring, and plumbing along the floor's width.
  • the width of the floor structure is from about 12 inches to about 96 inches, preferably from about 24 inches to about 48 inches, while the length of the floor structure is about 96 inches to about 300 inches, preferably from about 120 inches to about 240 inches.
  • the channels 14 illustrated in the present drawing are shown with sloped walls forming a U cross section, however, the shape of each of the channels can vary according to the specific design necessary for implementation of the floor structure. So in addition to the channels having a U cross section, the channels may also be formed in a rectangular cross section or a V cross section, or some other suitable shape.
  • Figure 1 shows one embodiment of the present invention with channels 14 made from curved, bent galvanized steel, 10 gage to 20 gage, preferably 12 gage to 18 gage.
  • the channels may optionally be fitted with stiffeners along their length to reinforce the channels.
  • the stiffeners may be made from stamped galvanized steel 10 gage to 20 gage, preferably 12 gage to 18 gage and shaped to fit snugly inside the area of the channel at 2 foot to 8 foot intervals (preferably 4 foot intervals) and at the supporting ends. As mentioned above, these channels , and the spaces between the channels, are useful for accommodating HVAC ducts, plumbing pipes, and fiber optic cables as well as other types of communication cables.
  • interlocking cams 35 may optionally be placed along the longitudinal edges of the floor structure in order to provide a better mechanical grip between adjacent and adjoining floor structure units.
  • An additional optional feature shown in figure 1 is a blocking member 11, which is disposed vertically between the upper surface 5 and lower surface 8, and permanently affixed thereto.
  • the blocking member may be a piece of solid wood lumber, a manufactured I-joist, a wood composite material or some other suitable material.
  • a particular advantage of the present invention is that the disclosed floor structure allows for the disentanglement of the building services, which have relatively shorts life spans (e.g., 10 years) from the floor and building itself, which should have a much longer life span (e.g., over 100 years). Utilizing the presently disclosed floor structure allows for the building services to be easily upgraded in the future when necessary or when more sophisticated equipment becomes available.
  • Yet another advantage of this arrangement as found in the present invention is that it also increases the strength performance of the floor structure because the larger footprint of the channel on the lower wood composite board 5 acts to reinforce the floor structure in the area where the high tension forces make the floor structure more likely to fail
  • the channels 17 must be securely attached to the upper and lower wood 5, 8 composite boards, with nails, screws, adhesive glue, or other permanent fasteners as described above.
  • the channels 17 may additionally have extending tabs 23 (See Fig. 2a) to facilitate attachment of the channels to the upper surface 5. Fasteners may be
  • an adhesive may also be used to ensure that the channels are sufficiently fastened to the upper and lower composite boards so that the channels can bring strength reinforcing properties as described above.
  • This adhesive is typically applied in beads of a typical width of 1/4 inch, but wider or thinner depending on the specific individual needs.
  • the adhesive resin used to from the bead in the present invention may be selected from a variety of different polymer materials such as epoxies, phenolic, resorcinol, acrylic, polyurethane, phenolic-resorcinol-formaldehyde resin, and polymeric methylenediisocyanate ("pMDI"). The selection will largely depend on the cost and performance targets specified.
  • ISOSET® UX-100 Adhesive available from Ashland Specialty Chemical Company, Columbus, Ohio.
  • ISOSET is a two-part resin system, based on a 100-percent solids polyurethane adhesive, blended with conventional ISOSET adhesive. This system offers faster strength and faster complete cure times, while providing excellent strength performance.
  • Particularly preferred is PL® Premium sub floor adhesive available from PL Sealants and Adhesives, Mentor, Ohio.
  • tongue and groove surfaces can be added to the edges of the floor structure to ensure good, tight fits with adjacent floor structure pieces.
  • interlocking cams can be formed on the longitudinal edges to pull the panels tight during assembly.
  • four machined holes may be added to the lower panel as a means of easily attaching cables for lifting and lowering the panel into place with a crane.
  • the overall thickness of the floor structure will be about 8 inches to about 24 inches, preferably about 10 inches to about 14 inches.
  • the floor structures were four feet wide, 20 foot long, and 9.5 inches thick.
  • the upper and lower composite wood boards were 23/32" AdvanTech boards. Between the upper and lower composite wood boards were arranged three channels, cross sectional illustrations and dimensions of these channels are shown in Figure 2.
  • the channels themselves were 20 feet long, and stiffeners at each end and along the channels at a longitudinal spacing of one stiffener for every four feet.
  • Screws were inserted every 8-inches as indicated by in Figure 2 to fasten the metals channels to the upper and lower composite wood boards.
  • the screws used were
  • the extending tabs 23 are approximately 1.5 inches long.
  • a stiffener 29 Shown in Fig 2b is a stiffener 29 to be placed inside the channel 14, with a hole 45 (as described above) placed in the exact center of the stiffener 29.
  • a conventional floor structure was built with concrete foundation walls made according to size and set at the proper spacing.
  • the 2x4 plate was bolted down to the top of the concrete supports, and the rimboard was placed on the plate and attached thereto with nail fasteners, at an industry-wide standard spacing for nails of every 12", I Joists were installed on the rimboard and AdvanTech floor sheathing was fastened to the I Joists with a continuous bead of polyurethane construction adhesive.
  • the I joists were made from 3/8 inch OSB webstock and solid wood lumber flanges that were 1.5 inch by 2.5 inch..
  • Examples 1 and 2 were then tested to measure the stiffness of the flooring structures and assess whether they are sufficiently stiff as to avoid undesirable vibrations.
  • a drop weight apparatus was used to apply a repeatable dynamic loading to the floor systems.
  • Two accelerometers and two linear variable displacement transducers (LVDTs) were installed at the center spans, one at the center of the width, and one at one edge.
  • the drop weight apparatus was placed at the center of the floor at mid-span.
  • the present invention performed comparably to the prior art, with a vibration performance that was only slightly lower but still comparable to the prior art — higher fundamental frequency measurements are indicative of a better "feel" to the floor. It is likely that the fundamental frequency could be increased by using stiffer panels or stiffer channel sections. Deflection under 318 lbs is another measure of the stiffness and firmness of the floor. The deflection of the present invention was very similar to the deflection experienced by the prior art, another indicator of comparable stiffness performance.
  • the floor structures made according to the present invention had comparable stiffness as prior art floor systems made of LVL joists. And further, floor structures made according to the present invention actually had higher stiffness than a floor system section of solid wood lumber I- Joists.

Landscapes

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

Abstract

L'invention porte sur une structure de plancher comprenant: une surface supérieure placée parallèle à une surface inférieure; et un ou plusieurs canaux placés verticalement entre les surfaces supérieure et inférieure et s'étendant le long de ces surfaces supérieure et inférieure, chacun de ces canaux ayant une partie supérieure et une partie inférieure.
PCT/US2006/018095 2005-05-26 2006-05-10 Structure de plancher composite acier-bois WO2006127280A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US11/137,967 2005-05-26
US11/137,967 US20060266001A1 (en) 2005-05-26 2005-05-26 Composite steel-wood floor structure

Publications (2)

Publication Number Publication Date
WO2006127280A2 true WO2006127280A2 (fr) 2006-11-30
WO2006127280A3 WO2006127280A3 (fr) 2007-05-10

Family

ID=37452569

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2006/018095 WO2006127280A2 (fr) 2005-05-26 2006-05-10 Structure de plancher composite acier-bois

Country Status (5)

Country Link
US (1) US20060266001A1 (fr)
AR (1) AR054049A1 (fr)
PE (1) PE20070029A1 (fr)
TW (1) TW200716834A (fr)
WO (1) WO2006127280A2 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8615945B2 (en) * 2010-08-24 2013-12-31 James Walker Ventilated structural panels and method of construction with ventilated structural panels
US9604428B2 (en) 2010-08-24 2017-03-28 James Walker Ventilated structural panels and method of construction with ventilated structural panels
US8534018B2 (en) * 2010-08-24 2013-09-17 James Walker Ventilated structural panels and method of construction with ventilated structural panels
US9091049B2 (en) 2010-08-24 2015-07-28 James Walker Ventilated structural panels and method of construction with ventilated structural panels
US9050766B2 (en) 2013-03-01 2015-06-09 James Walker Variations and methods of producing ventilated structural panels
US20220371219A1 (en) * 2021-05-20 2022-11-24 Washington State University Thermally modified composite wood-strand products for construction and other applications

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Also Published As

Publication number Publication date
AR054049A1 (es) 2007-05-30
WO2006127280A3 (fr) 2007-05-10
US20060266001A1 (en) 2006-11-30
TW200716834A (en) 2007-05-01
PE20070029A1 (es) 2007-01-22

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