STEEL-MADE GRATING FLOOR BOARD

PROBLEM TO BE SOLVED: To provide a steel-made grating floor board excellent in fatigue life. SOLUTION: The steel-made grating floor board comprises a basic structural member made by forming a circular through holes 7 in a web 6 of a main member 4 made of shape steel bars having an I section and arra...

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Bibliographische Detailangaben
Hauptverfasser:	HIROZAWA MASAO, YAMADA TAKESHI
Format:	Patent
Sprache:	eng
Schlagworte:	ASSEMBLY OF BRIDGES BUILDING BUILDING MATERIALS CONSTRUCTION OF BRIDGES CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES FINISHING WORK ON BUILDINGS, e.g. STAIRS, FLOORS FIXED CONSTRUCTIONS OR VIADUCTS STRUCTURAL ELEMENTS
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Beschreibung
Zusammenfassung:	PROBLEM TO BE SOLVED: To provide a steel-made grating floor board excellent in fatigue life. SOLUTION: The steel-made grating floor board comprises a basic structural member made by forming a circular through holes 7 in a web 6 of a main member 4 made of shape steel bars having an I section and arranged at a specified interval, passing steel-made lateral main-members 5 having a circular section through the through holes 7 and welding and fixing them. By employing the above basic structural member, the floor board is provided with an enhanced fatigue life, and when the floor board is used in a bridge or the like, reduction in maintenance and control costs can be expected. Because any special technique is not necessary for enhancement of the fatigue life, the enhancement is not accompanied by increase in manufacturing cost, and can be realized with a manufacturing cost not higher than that of a conventional open grating floor board. COPYRIGHT: (C)2005,JPO&NCIPI