Abstract: The present invention provides a steel frame beam-reinforcing metal fixture that is capable of recovering the full strength of a steel frame beam to a greater extent than a conventional steel frame beam-reinforcing metal fixture for an S structure. A steel frame beam-reinforcing metal fixture is substantially fitted to a web opening in an SRC beam. An outer peripheral portion of the steel frame beam-reinforcing metal fixture is fillet-welded to a steel frame beam web. The axial length of the steel frame beam-reinforcing metal fixture is between 0.5 and 200.0 times the thickness thereof in the radial direction. Furthermore, in the steel frame beam-reinforcing metal fixture, a length from one end side of the steel frame beam web to one end of the outer peripheral portion and a length from the other end side of the steel frame beam web to the other end of the outer peripheral portion are each at least 0.7 times the thickness of the steel frame beam web.

Abstract: A column base structure formed by integrally joining a column base metal fitting having a raised portion and a base plate to a steel-frame column, and joining the column base metal fitting joined to the steel-frame column to a concrete foundation via anchor bolts embedded in the concrete foundation, in which an anchor-bolt retainer having an upper anchor plate and a lower anchor plate is fixedly fitted to support members installed on a concrete subslab, anchor bolts are hold in position via the anchor-bolt retainer, and the anchor bolts are embedded, together with the anchor-bolt retainer, into the concrete foundation.

Abstract: A connecting assembly is disposed between a concrete column and at least one beam having upper and lower flanges. The connecting assembly has upper and lower connecting members and a tubular member disposed between the connecting members. The upper and lower connecting members are mounted on the upper and lower flanges of the beam, respectively. Each of the connecting members has at least one through-hole in which concrete of the column is filled, so that the column is partly encased by the tubular member. Accordingly, the column is connected to the beam.

Abstract: A connecting assembly is disposed between a concrete column and at least one beam having upper and lower flanges. The connecting assembly has upper and lower first connecting members each having at least one through-hole through which at least one portion of the column is disposed so that both of the first connecting members are mounted on the column. Upper and lower second connecting members are mounted on the upper and lower flange portions of the beam, respectively. The upper and lower second connecting members are affixed respectively to the upper and lower first connecting members by screw engagements, whereby the column is connected to the beam.

Abstract: A connector/beam joining method for joining a beam and a connector having a base plate and a projection, both formed into a T-shape in cross-section, in which the edge of a welding groove provided on the end of the projection of the connector is matched with the edge of the inside surface of a flange constituting the beam for positioning, and a backing strip formed into a prescribed length is fixedly fitted by welding so as to come in close contact with the end surface of the projection and the inside surface of the flange.

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: 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: A protective tube for a thermocouple for measuring the temperature of molten metal, comprising two layers, an inner layer being made of a silicon nitride or sialon ceramic having a bending strength of 50 kg/mm.sup.2 or more, a density of 90% or more based on a theoretical density and a thermal shock temperature .DELTA.T of 400.degree. C. or more, and an outer layer being formed on the silicon nitride or sialon ceramic and containing BN and SiO.sub.2. The silicon nitride of sialon ceramic comprises 70 weight % or more of Si.sub.3 N.sub.4 having 65 weight % or more of an .alpha.-phase content, 20 weight % or less of one or more oxides of elements of Group IIIa of the Periodic Table, 20 weight % or less of Al.sub.2 O.sub.3, and optionally 15 weight % or less of AlN or AlN solid solution, and the outer layer is composed mainly of BN-SiO.sub.2 -Al.sub.2 O.sub.3 -Y.sub.2 O.sub.3. This protective tube is produced by coating ceramic powder comprising BN and SiO.sub.2 before sintering.