Abstract

In order to compensate for a decreased coefficient of friction, to improve quality and rigidity, and to avoid reduction in work efficiency, this deck plate (10), formed from a metal plate and suspended between beams, is provided, on one surface, with: ribs (1) which, spaced apart from each other, extend from one end to the other end in the direction of suspending; an end-closed part (3) where both ends of the ribs (1) are crushed in the direction orthogonal to the one surface; and uneven parts (4) which are formed on a flat part (2) between adjacent ribs (1).

IPC Classes  ?

• E04B 5/40 - Floor structures wholly cast in situ with or without form units or reinforcements with form units as part of the floor with slab-shaped form units acting simultaneously as reinforcementForm slabs with reinforcements extending laterally outside the element with metal form slabs

Abstract

The present invention addresses the problem of providing a steel form that makes it possible to reduce labor or costs required to process or transport the steel form. This steel form 10 is a steel form 10 for forming a small beam 1, the steel form being provided with a pair of Z-steel bars 11. Each of the pair of Z-steel bars is provided with a bottom plate section 12 and a side plate section 13 extending upward from the bottom plate section 12. The bottom plate sections 12 have joint surfaces 16 for mutually joining the respective bottom plate sections 12 of the pair of Z-steel bars 11, and a groove section in which a small-beam concrete 20 can be poured is formed by means of the bottom plate sections 12 and the side plate sections 13 of the pair of Z-steel bars 11.

IPC Classes  ?

• E04B 1/16 - Structures made from masses, e.g. concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, sub-structures to be coated with load-bearing material

Abstract

The present invention addresses the problem of providing a steel-framed concrete beam and a construction method of the steel-framed concrete beam, which can reduce labor or costs required for separately installing a reinforcing member to form a through-hole. This small beam 1 is provided with: a steel frame 10 which has a bottom plate part 12 and a pair of side plate parts 13 that extend upward from both ends of the bottom plate part 12; and a small-beam concrete 20 which is poured into a groove portion formed by the bottom plate part 12 and the pair of side plate parts 13 of the steel frame 10.

IPC Classes  ?

• E04B 1/16 - Structures made from masses, e.g. concrete, cast or similarly formed in situ with or without making use of additional elements, such as permanent forms, sub-structures to be coated with load-bearing material

Abstract

The purpose of the invention is to allow support for construction in large cross sections and to prevent a decrease in construction efficiency. A segment (5) constituting a submerged structure to be buried into the ground comprises an external piece (51) that forms an external wall of the submerged structure, an internal piece (52) that forms an internal wall of the submerged structure, and a coupling piece (53) that couples the external piece (51) and the internal piece (52). At least one of the external piece (51) and the internal piece (52) is formed from concrete.

IPC Classes  ?

• E21D 5/10 - Lining shaftsLinings therefor with iron or steel in the form of tubbing
• E02D 23/00 - CaissonsConstruction or placing of caissons
• E21D 11/04 - Lining with building materials

Abstract

A projection blackboard having both of an excellent blackboard function and an excellent screen function, and a process for producing the same. The surface enamel layer that is an outermost layer of the enamel layers is formed by using a enameling upper glaze wherein at least titanium oxide coated particles, or a titanium oxide glaze together therewith is blended into a transparent mat glaze, so as to render the layer an enamel layer having a predetermined color tone, a surface characteristic that the Rz is from 5 to 25 μm and a reflective characteristic that the peak gain is 0.28 or more, or having these properties and a glossiness Gs (75°) of 1 to 30%. This makes it possible to produce a blackboard excellent in both of blackboard function and screen function. The titanium oxide coated particles are preferably particles wherein surfaces of mica particles are coated with titanium oxide.

IPC Classes  ?

• B05D 3/02 - Pretreatment of surfaces to which liquids or other fluent materials are to be appliedAfter-treatment of applied coatings, e.g. intermediate treating of an applied coating preparatory to subsequent applications of liquids or other fluent materials by baking
• B43L 1/04 - Blackboards
• B43L 1/10 - Writing surfaces thereof
• G03B 21/60 - Projection screens characterised by the nature of the surface

Abstract

A projection blackboard having both of an excellent blackboard function and an excellent screen function, and a process for producing the same. The surface enamel layer that is an outermost layer of the enamel layers is formed by using a enameling upper glaze wherein at least titanium oxide coated particles, or a titanium oxide glaze together therewith is blended into a. transparent mat glaze, so as to render the layer an enamel layer having a predetermined color tone, a surface characteristic that the Rz is from 5 to 25 μm and a reflective characteristic that the peak gain is 0.28 or more, or having these properties and a glossiness Gs(75°)of 1 to 30%. This makes it possible to produce a blackboard excellent in both of blackboard function and screen function. The titanium oxide coated particles are preferably particles wherein surfaces of mica particles are coated with titanium oxide.

IPC Classes  ?

• B32B 15/04 - Layered products essentially comprising metal comprising metal as the main or only constituent of a layer, next to another layer of a specific substance
• B32B 15/18 - Layered products essentially comprising metal comprising iron or steel
• B32B 15/20 - Layered products essentially comprising metal comprising aluminium or copper
• B32B 18/00 - Layered products essentially comprising ceramics, e.g. refractory products

Abstract

⏧PROBLEMS] To provide a projection blackboard having both of excellent blackboard function and excellent screen function; and provide a process for producing the same. ⏧MEANS FOR SOLVING PROBLEMS] Among enamel layers superimposed on a metal substrate, the surface enamel layer as the outermost layer consists of an enamel layer of given color tone, 5 to 25 騜m Rz surface property and 0.28 or higher peak gain reflection property, optionally further 1 to 30% glossiness Gs (75º) produced from an enamel glaze composed of a transparent mat glaze blended at least with titanium oxide coated particles, optionally further with a titanium oxide glaze. Consequently, a blackboard having both of excellent blackboard function and excellent screen function can be obtained. The titanium oxide coated particles are preferably particles obtained by coating the surface of mica particles with titanium oxide. Moreover, the metal substrate is preferably a cold rolled steel sheet, an aluminum plated steel sheet or a Zn-Al alloy plated steel sheet.

IPC Classes  ?

• B43L 1/10 - Writing surfaces thereof
• B43L 1/04 - Blackboards
• G03B 21/60 - Projection screens characterised by the nature of the surface