STUDY ON THE CHANGE AND BACKGROUND OF NUMERICAL FORMULAS IN REGULATIONS FOR STRUCTURAL CALCULATION FROM THE DRAFTS OF TOKYO CITY BUILDING ORDINANCE PLANNED BY MEMBERS OF A.I.J. TO THE URBAN BUILDING LAW ENFORCEMENT REGULATIONS

Abstract

We study the historical changes and backgrounds of the numerical formulas appeared in the regulations for structural calculation. The regulations and their drafts, from the Drafts of Tokyo City Building Ordinance planned by members of A. I. J. to the Urban Building Law Enforcement Regulations, are surveyed in this study. The majority of formulas had been deleted once in the Drafts of Tokyo City Building Ordinance. But later all of them restored to the Drafts of Tokyo Prefecture Building Regulations planned in the Metropolitan Police Department, or to the Urban Building Law Enforcement Regulations. The Urban Building Law Enforcement Regulations had new formulas which had been prescribed in the Drafts of Tokyo Prefecture Building Regulations. The formula regulations started to be independent from copy of foreign regulations.