Abstract: A method of designing a rolled H-section steel includes: setting a height dimension H from an upper flange to a lower flange, a width dimension W of each of the upper flange and the lower flange, a plate thickness tw of a web, and a plate thickness tf of each of the upper flange and the lower flange so that, when it is assumed that a value obtained by dividing a second moment of area Ix about a strong axis by an outer circumferential length Lp in a cross-sectional shape when viewed in a cross section perpendicular to a member axis direction is a surface treatment economy Ix/Lp and an area of the cross-sectional shape is S, a predetermined relational formula is satisfied.

Abstract: A panel which includes, among protrusions protruding from a predetermined reference surface, flat sections being flush with the reference surface, and recesses being recessed from the reference surface, the protrusions, and the flat sections or recesses, wherein; when the panel includes the flat sections, the entire periphery of each of the protrusions is surrounded by the flat sections, and the entire periphery of each of the flat sections is surrounded by the protrusions, while when the panel includes the recesses, the entire periphery of each of the protrusions is surrounded by the recesses, and the entire periphery of each of the recesses is surrounded by the protrusions.

Abstract: In an embodiment of a steel sheet having high Young's modulus, the steel can include in terms of mass %, e.g., C: 0.0005 to 0.30%, Si: 2.3% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and Al: 0.15% or less, with the remainder being Fe and unavoidable impurities. One or both of {110}<223> pole density and {110}<111> pole density in the ? sheet thickness layer can be 10 or more, and a Young's modulus in a rolling direction can be more than 230 GPa. Other embodiments can include, e.g., Mn: 0.1 to 5.0%, N: 0.01% or less, and one or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14×N (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.91 mass %.

Abstract: Steel sheet having a composition of ingredients containing substantially, by mass %, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150% and satisfying the relationship of Ti?48/14×N?0.0005, having a sum of the X-ray random intensity ratios of the {100}<001> orientation and the {110}<001> orientation of a ? sheet thickness part of 5 or less, having a sum of the maximum value of the X-ray random intensity ratios of the {110}<111> to {110}<112> orientation group and the X-ray random intensity ratios of the {211}<111> orientation of 5 or more, and having a high rolling direction Young's modulus measured by the static tension method and a method of production of the same are provided.

Abstract: A panel which includes, among protrusions protruding from a predetermined reference surface, flat sections being flush with the reference surface, and recesses being recessed from the reference surface, the protrusions, and the flat sections or recesses, wherein; when the panel includes the flat sections, the entire periphery of each of the protrusions is surrounded by the flat sections, and the entire periphery of each of the flat sections is surrounded by the protrusions, while when the panel includes the recesses, the entire periphery of each of the protrusions is surrounded by the recesses, and the entire periphery of each of the recesses is surrounded by the protrusions.

Abstract: There is provided a frame for holding an electronic device, the frame including an inner member that has a shape of continuous or discontinuous loop, and is made of hollow metal having a closed cross-section; and a plurality of corner reinforcing members that are made of metal and are fixed at positions that cover curved portions of the inner member.

Abstract: In an embodiment of a steel sheet having high Young's modulus, the steel can include in terms of mass %, e.g., C: 0.0005 to 0.30%, Si: 2.3% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and Al: 0.15% or less, with the remainder being Fe and unavoidable impurities. One or both of {110}<223> pole density and {110}<111> pole density in the ? sheet thickness layer can be 10 or more, and a Young's modulus in a rolling direction can be more than 230 GPa. Other embodiments can include, e.g., Mn: 0.1 to 5.0%, N: 0.01% or less, and one or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14×N (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.91 mass %.

Abstract: One aspect of the steel sheet having high Young's modulus includes in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, S: 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and Al: 0.15% or less, with the remainder being Fe and unavoidable impurities, wherein one or both of {110}<223> pole density and {110}<111> pole density in the ? sheet thickness layer is 10 or more, and a Young's modulus in a rolling direction is more than 230 GPa. Another aspect of the steel sheet having high Young's modulus includes, in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 0.1 to 5.0%, P: 0.15% or less, S: 0.015% or less, Al: 0.15% or less, N: 0.01% or less, and further comprises one or two or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14×N (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.

Abstract: Steel sheet having a composition of ingredients containing substantially, by mass %, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150% and satisfying the relationship of Ti?48/14×N?0.0005, having a sum of the X-ray random intensity ratios of the {100}<001> orientation and the {110}<001> orientation of a ? sheet thickness part of 5 or less, having a sum of the maximum value of the X-ray random intensity ratios of the {110}<111> to {110}<112> orientation group and the X-ray random intensity ratios of the {211}<111> orientation of 5 or more, and having a high rolling direction Young's modulus measured by the static tension method and a method of production of the same are provided.

Abstract: A floor structure includes a plurality of structural metal components that each have: a plate-shaped supporting portion that is laid either perpendicular or oblique to an installation surface; a plate-shaped top flange that extends from a top end portion of the supporting portion in parallel with the installation surface; a plate-shaped bottom flange that extends from a bottom end portion of the supporting portion in parallel with the installation surface and in the opposite direction from the top flange, wherein the structural metal components are laid on a flat surface in parallel with each other such that the top flange of one of the mutually adjacent structural metal components covers the bottom flange of the other of the mutually adjacent structural metal material.

Abstract: A floor structure includes a plurality of structural metal components that each have: a plate-shaped supporting portion that is laid either perpendicular or oblique to an installation surface; a plate-shaped top flange that extends from a top end portion of the supporting portion in parallel with the installation surface; a plate-shaped bottom flange that extends from a bottom end portion of the supporting portion in parallel with the installation surface and in the opposite direction from the top flange, wherein the structural metal components are laid on a flat surface in parallel with each other such that the top flange of one of the mutually adjacent structural metal components covers the bottom flange of the other of the mutually adjacent structural metal material.

Abstract: A floor structure includes a plurality of structural metal components that each have: a plate-shaped supporting portion that is laid either perpendicular or oblique to an installation surface; a plate-shaped top flange that extends from a top end portion of the supporting portion in parallel with the installation surface; a plate-shaped bottom flange that extends from a bottom end portion of the supporting portion in parallel with the installation surface and in the opposite direction from the top flange, wherein the structural metal components are laid on a flat surface in parallel with each other such that the top flange of one of the mutually adjacent structural metal components covers the bottom flange of the other of the mutually adjacent structural metal material.

Abstract: There is provided a frame for holding an electronic device, the frame including an inner member that has a shape of continuous or discontinuous loop, and is made of hollow metal having a closed cross-section; and a plurality of corner reinforcing members that are made of metal and are fixed at positions that cover curved portions of the inner member.

Abstract: Steel sheet having a composition of ingredients containing substantially, by mass %, C: 0.005 to 0.200%, Si: 2.50% or less, Mn: 0.10 to 3.00%, N: 0.0100% or less, Nb: 0.005 to 0.100%, and Ti: 0.002 to 0.150% and satisfying the relationship of Ti-48/14×N?0.0005, having a sum of the X-ray random intensity ratios of the {100}<001> orientation and the {110}<001> orientation of a ? sheet thickness part of 5 or less, having a sum of the maximum value of the X-ray random intensity ratios of the {110}<111> to {110}<112> orientation group and the X-ray random intensity ratios of the {211}<111> orientation of 5 or more, and having a high rolling direction Young's modulus measured by the static tension method and a method of production of the same are provided.

Abstract: A floor structure includes a plurality of structural metal components that each have: a plate-shaped supporting portion that is laid either perpendicular or oblique to an installation surface; a plate-shaped top flange that extends from a top end portion of the supporting portion in parallel with the installation surface; a plate-shaped bottom flange that extends from a bottom end portion of the supporting portion in parallel with the installation surface and in the opposite direction from the top flange, wherein the structural metal components are laid on a flat surface in parallel with each other such that the top flange of one of the mutually adjacent structural metal components covers the bottom flange of the other of the mutually adjacent structural metal material.

Abstract: One aspect of the steel sheet having high Young's modulus includes in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 2.7 to 5.0%, P: 0.15% or less, S: 0.015% or less, Mo: 0.15 to 1.5%, B: 0.0006 to 0.01%, and Al: 0.15% or less, with the remainder being Fe and unavoidable impurities, wherein one or both of {110}<223> pole density and {110}<111> pole density in the ? sheet thickness layer is 10 or more, and a Young's modulus in a rolling direction is more than 230 GPa. Another aspect of the steel sheet having high Young's modulus includes, in terms of mass %, C: 0.0005 to 0.30%, Si: 2.5% or less, Mn: 0.1 to 5.0%, P: 0.15% or less, S: 0.015% or less, Al: 0.15% or less, N: 0.01% or less, and further comprises one or two or more of Mo: 0.005 to 1.5%, Nb: 0.005 to 0.20%, Ti: at least 48/14×N (mass %) and 0.2% or less, and B: 0.0001 to 0.01%, at a total content of 0.015 to 1.