# US 2019/0376289 A1 · Steel-framed concrete beam and method for constructing steel-framed concrete beam > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2019/0376289 A1 - Document ID: US20190376289A1 - Status: Published application - Kind: A1 - Application number: 16/549,198 - Filed: 2019-08-23 - Published: 2019-12-12 - Earliest claimed: 2017-02-28 - Assignees: Takenaka Corporation; Jfe Steel Corporation; Jfe Metal Products Corporation - Applicants: Takenaka Corporation; Jfe Steel Corporation; Jfe Metal Products Corporation - Inventors: Takayuki HIRAYAMA; Kazuto NAKAHIRA; Hirokazu NOZAWA; Yuuichirou OKUNO; Takahiro MACHINAGA; Naohiro FUJITA; Hiroto TAKATSU; Kenji YAMAZAKI; Yukio MURAKAMI; Tomohiro KINOSHITA; Takanori SHIMIZU; Seishi WATANABE; Hiroori YASUOKA - Web page: https://patentgrep.com/patent/US20190376289A1 ## CPC - E04C 3/293: the materials being steel and concrete (concrete with internal reinforcements or tensioning members E04C3/20) - E04C 3/294: of concrete combined with a girder-like structure extending laterally outside the element (light weight girders used as reinforcement E04C5/065; as part of a floor structure E04B5/23) - E04B 1/16: Structures made from masses, e.g. of concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, substructures to be coated with load-bearing material (E04B1/32 - E04B1/36 take precedence) - E04B 5/40: with metal form-slabs - E04C: STRUCTURAL ELEMENTS; BUILDING MATERIALS (for bridges E01D; specially designed for insulation or other protection E04B; elements used as building aids E04G; for mining E21; for tunnels E21D; structural elements with broader range of application than for building engineering F16, particularly F16S) - E04B: GENERAL BUILDING CONSTRUCTIONS; WALLS, e.g. PARTITIONS; ROOFS; FLOORS; CEILINGS; INSULATION OR OTHER PROTECTION OF BUILDINGS (border constructions of opening in walls, floors or ceilings E06B1/00; {electromagnetic shielding H05K9/0001}) ## Abstract A binding beam includes a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion and binding beam concrete placed in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form. ## Claims ### Claim 1 A steel-framed concrete beam comprising: a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion; and concrete placed in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form. ### Claim 2 (depends on 1) The steel-framed concrete beam according to claim 1, wherein an allowable bending moment or an allowable shear force of the steel-framed concrete beam is calculated by Equation (1) below: Fa=FRC+β·FS (Equation 1) wherein, Fa: an allowable bending moment or an allowable shear force of the steel-framed concrete beam, FRC: an allowable bending moment or an allowable shear force of the concrete, β: a burden factor of an allowable bending moment or an allowable shear force of the steel form, which is 0.5 or less, and FS: an allowable bending moment or an allowable shear force of the steel form. ### Claim 3 (depends on 1) The steel-framed concrete beam according to claim 1, wherein a part of the steel-framed concrete beam is joined to a girder, and the steel form is provided with an end portion on the girder side in a longitudinal direction of the steel form, accommodated in the girder via a notch formed in a side surface of the girder, and having a length equal to or greater than a cover thickness of the girder. ### Claim 4 (depends on 1) The steel-framed concrete beam according to claim 1, wherein the side plate portion and the concrete have a web opening forming portion allowing formation of a web opening penetrating the side plate portion and the concrete. ### Claim 5 (depends on 1) The steel-framed concrete beam according to claim 1, wherein a non-opening member for fixing the pair of side plate portions to each other is provided in a range from an upper end position of the pair of side plate portions to a position below the upper end position by one-third of a height of the pair of side plate portions. ### Claim 6 (depends on 1) The steel-framed concrete beam according to claim 1, wherein the steel form is provided with a flange portion extending outward from an upper end of the side plate portion. ### Claim 7 (depends on 6) The steel-framed concrete beam according to claim 6, wherein the steel form is provided with a reinforcing portion extending downward or upward from an outer end of the flange portion. ### Claim 8 A method for constructing a steel-framed concrete beam comprising: a steel form installation step of installing a steel form having a bottom plate portion and a pair of side plate portions extending upward from both ends of the bottom plate portion; and a placement step of placing concrete in a groove portion configured by the bottom plate portion and the pair of side plate portions of the steel form installed in the steel form installation step. ### Claim 9 (depends on 8) The method for constructing a steel-framed concrete beam according to claim 8, wherein an allowable bending moment or an allowable shear force of the steel-framed concrete beam is calculated by Equation (1) below: Fa=FRC+β·FS (Equation 1) wherein, Fa: an allowable bending moment or an allowable shear force of the steel-framed concrete beam, FRC: an allowable bending moment or an allowable shear force of the concrete, β: a burden factor of an allowable bending moment or an allowable shear force of the steel form, which is 0.5 or less, and FS: an allowable bending moment or an allowable shear force of the steel form.