Abstract: A column base structure having connected a pair of column-base metal fittings to the lower part of a column consisting of a pair of main column members disposed at predetermined intervals and connecting members disposed in such a manner as to integrally connect the main column members; the column base metal fittings being fixedly fitted to a concrete foundation via anchor bolts and nuts; characterized in that a horizontal member having a predetermined cross-sectional area is integrally and fixedly fitted between the main column members in the vicinity of the column base metal fitting.

Abstract: The present invention relates to method and apparatus for heating a strip of metallic material in a continuous annealing furnace and more particularly to an improvement relating to a method and apparatus for heating a strip of metallic material in a continuous annealing furnace in which annealing of the strip is continuously carried out in such a manner that a gas serving to adjust temperature of the strip, is blown toward the strip through a plurality of gas jet nozzles which are arranged on one side or both sides of the strip, wherein the temperature and flow rate of the strip are properly determined to a required level in response to the changing of the operating conditions such as the heat cycle, line speed, thickness of strip, width of strip and the like.

Abstract: A column/beam joint structure, made of steel members, in which a reinforcing member formed into a flat plate or into a strip shape so as to surround the outer periphery of the flange is interposed between a flange having a vertical plane constituting the column and a base plate constituting a connector fixedly fitted to an end of a beam. The flange, the reinforcing member and the connector are integrally joined together via a connecting fastener member.

Abstract: An elasto-plastic damper is adapted to be used in a structure, such as a building and other facilities, for absorbing vibration energy created by earthquake tremors and other ground vibrations. The damper is a centrally bulged and generally cone-shaped hollow body of revolution so that its section modulus changes substantially proportional to a bending moment created in the damper body due to horizontal stresses, thus permitting a maximum degree of deformability. This elasto-plastic damper is compact in size and demonstrates a high degree of vibrational energy absorbability.

Abstract: The present invention relates to method and apparatus for heating a strip of metallic material in a continuous annealing furnace and more particularly to an improvement relating to a method and apparatus for heating a strip of metallic material in a continuous annealing furnace in which annealing of the strip is continuously carried out in such a manner that a gas, serving to adjust temperature of the strip, is blown toward the strip through a plurality of gas jet nozzles which are arranged on one side or both sides of the strip, wherein the temperature and flow rate of the strip are properly determined to a required level in response to the changing of the operating conditions such as the heat cycle, line speed, thickness of strip, width of strip and the like.

Abstract: In a method of continuously annealing and pickling steel strips successively transferred through a continuous annealing apparatus including heating and cooling zones and a pickling apparatus, annealing the steel strips is effected in reducing atmosphere and thereafter pickling is effected at least by nitric acid electrolytic treatment. In an apparatus for continuously annealing and pickling steel strips, including a continuous annealing furnace and a pickling apparatus, the continuous annealing furnace consists of vertical furnaces capable of advancing a steel strip in a manner substantially repeating upward and downward movements alternately in substantially vertical directions and the pickling apparatus comprises at least a nitric acid electrolytic cell.

Abstract: A low load burning burner comprising inner air flow nozzles, outer air flow nozzles and a fuel gas nozzle, and further having a motive air supply means, which is operated at the low load burning of a heating furnace, can maintain the furnace temperature uniform, and can heat materials arranged in the width direction of the furnace to a uniform temperature along the width direction of the furnace.

Abstract: A galvanizing furnace comprises a plurality of burners arrayed parallel to the surface of sheet iron to be galvanized and having burner nozzles directed upwards so that flame exiting the burner nozzles forms a screen-like wall of flame opposite and parallel to the sheet iron as the sheet iron passes through the alloying furnace. Preferably, the burners are separated into a plurality of blocks which can be controlled independently.

Abstract: A method and an apparatus for continuously annealing cold rolled steel strips successively passing through a preheating zone, a low temperature heating zone, a high temperature heating soaking zone, a primary cooling zone and a secondary cooling zone. In each zone, the steel strip is driven by hearth rolls alternately upward and downward in a serpentine path. According to the invention, in a high temperature zone such as the high temperature heating zone and the primary cooling zone where the steel strip is prone to heat buckling, the steel strip is caused to pass only once in a single direction without passing along the serpentine path, thereby preventing meandering and heat buckling of the steel strip.

Abstract: A method of burning a fuel gas in a low NO.sub.x level in the exhaust gas is disclosed, wherein a radiant tube burner having concentrically arranged outer air flow nozzle, fuel gas nozzles arranged in a circle and inner air flow nozzle and having a particular structure is used and the fuel gas is burnt under a particularly limited condition.

Abstract: One-side zinc hot dipped steel sheets are produced by coating one surface of a steel sheet with an aqueous slurry of an anti-plating agent based on MgO, alkali metal silicates, boric acid, MOH (M is an alkali metal) and the like and containing such additives as TiO.sub.2 and Al.sub.2 O.sub.3, heating the coated sheet for drying and baking, immersing the steel sheet with an anti-plating film in a molten zinc bath to zinc plate the other surface of the sheet, wetting the anti-plating film, and bending the steel sheet to cause the anti-plating film to peel off, thereby removing the anti-plating film from the steel sheet. This invention carries out the coating and baking of the anti-plating agent such that it is baked to a film having a thickness of 20 to 60 microns at a temperature of 750.degree. C. to about 930.degree. C.

Abstract: Slabs can be uniformly heated by the use of a side-burner type heating furnace having flame length-variable type burners in the side walls, each burner consisting of an inner air flow nozzle, a fuel gas nozzle and an outer air flow nozzle arranged concentrically, and by adjusting the ratio of the flow rate of air passing through the inner air flow nozzle to the flow rate of air passing through the outer air flow nozzle depending upon the variation of the flow rate of fuel gas.

Abstract: A process comprising the steps of adding an inorganic foamed aggregate, an inorganic solid aggregate and a reinforcing fiber to cement to prepare a cement mixture, kneading the cement mixture with addition of 3 to 15% by weight of water based on the mixture to obtain a relatively hard kneaded mixture, press-molding the kneaded mixture at pressure of 200 to 600 kg/cm.sup.2, adding water to the molded piece to adjust the water content thereof, preheating the molded piece at a temperature of 40.degree. to 70.degree. C. before curing, spraying to the surface of the heated molded piece an aqueous dispersion prepared from resin and cement-type coloring material and containing inorganic particles 0.1 to 1.5 mm in size, drying the coated piece, applying a colored resin composition to the coating, and curing the resulting piece in an autoclave with pressurized steam, whereby a colored roofing panel or like cement product can be prepared.

Abstract: A steel column base member for connecting an H-shaped structural steel column member to a concrete foundation, which base plate member is an integral cast or forged body comprising a bottom plate member to engage the foundation, an H-shaped projection upwardly extending from the bottom plate member and having J-shaped grooves formed along both edges of top surface of projection the width of web of projection being broader than that of web of column member, so as to effect groove welding between the bottom surface of the steel column member and the J-shaped grooved surfaces, and fillet welding both side of web of the column member and base plate member.

Abstract: A steel column base member for connecting a hollow or box-shaped structural steel column member having square, rectangular or annular section, to a concrete foundation, which base plate member is an integral cast or forged body comprising a bottom plate member to engage the foundation, a box-shaped projection upwardly extending from the bottom plate member and having J-shaped grooves formed along overall outer edges of top surface of projection the width of web of projection being broader than thickness of column member, so as to effect groove welding between the bottom surface of the steel column member and the J-shaped grooved surfaces. A method of connecting an hollow or box-shaped steel column member to a base plate member is characterized by, effective J-shaped groove welding along between J-shaped groove surfaces of base plate member and the bottom surfaces of steel column member.

Abstract: Fittings for connecting columns and beams of a steel frame construction, each comprising a substantially rectangular base plate to be connected to the column by means of high strength bolts and having centrally a horizontally continuous thicker portion from which the base plate is tapered toward upper and lower edges, a horizontal protrusion projecting from the thicker portion in opposition to a flange of the beam and vertical protrusion in opposition to a web of the beam and projecting from the base plate to form with the horizontal protrusion a T-shaped protrusion.

Abstract: Fittings for connecting H-shaped beams and columns of a steel frame construction, each fitting comprising an L-shaped outer fitting member connecting an outer surface of a flange of the beam to the column by means of bolts and an L-shaped inner fitting member connecting an inner surface of the flange of the beam to the column by means of bolts having a space for receiving therein a web of the beam, thereby embracing the flange of the beam between the L-shaped outer and inner fitting members to provide two surface frictional engagements. A column side plate of each the L-shaped fitting members successively increases its thickness from a free end to a portion connected to the beam side plate thereof.

Abstract: A steel column base member for connecting a hollow or box-shaped structural steel column member having square, rectangular or annular section, to a concrete foundation, which base plate member is an integral cast or forged body comprising a bottom plate member to engage the foundation, a box-shaped projection upwardly extending from the bottom plate member and having J-shaped grooves formed along overall outer edges of top surface of projection the width of web of projection being broader than thickness of column member, so as to effect groove welding between the bottom surface of the steel column member and the J-shaped grooved surfaces. A method of connecting an hollow or box-shaped steel column member to a base plate member is characterized by, effecting J-shaped groove welding along between J-shaped groove surfaces of base plate member and the bottom surfaces of steel column member.

Abstract: A steel column base member for connecting an H-shaped structural steel column member to a concrete foundation, which base plate member is an integral cast or forged body comprising a bottom plate member to engage the foundation, an H-shaped projection upwardly extending from the bottom plate member and having J-shaped grooves formed along both edges of top surface of projection the width of web of projection being broader than that of web of column member, so as to effect groove welding between the bottom surface of the steel column member and the J-shaped grooved surfaces, and fillet welding both side of web of the column member and base plate member.

Abstract: A steel column base member for connecting structural steel column member to a concrete foundation, which base member is an integral molded or die-forged body comprising a base plate portion to engage the foundation, a projected portion to be joined to the column, and smoothly curved sidewalls extending from the base plate portion to the projected portion. The top surface of the projected portion is of substantially identical shape with the cross section of the column.