ブックタイトル「煉瓦造建造物の保存と修復」英語版

概要

「煉瓦造建造物の保存と修復」英語版

Brick Masonry Construction: Techniques and SignificanceNaoji HasegawaMinistry of Land, Infrastructure, Transport and TourismNational Institute for Land and Infrastructure ManagementSenior Fellow1. IntroductionIn brick masonry, it is the diversity created by the subtledifference in color and texture in each of the fired materialas well as the rhythm created by the brick-laying pattern,together with the various forms of pointing such as the flatjoint, V joint, and convex joint that make it attractive. Also,the brick masonry structure itself reminds people of the pasteras of Japan’s modernization and reflects the rich layeringof history. These buildings as important local resourcescan possibly become symbolic landmarks in communitydevelopment.From the technical point of view, although brick wallsat first sight may appear to have been built mechanically,they in fact are works realized through the creativity ofand careful planning by specialists in architecture and civilengineering, including designers, contractors, constructionsupervisors and managers, and brick masons. In otherwords, the author believes what is important and thusvaluable in brick masonry is that each of the componentbricks remains in its original position. This aspect meets oneof the standards,“difficult to replicate,”required for beingnationally registered as a cultural property fn 1 .Firstly, the conclusive remark for this paper will begiven. The essential points in repairing and restoring brickstructures are as follows:・Avoid re-laying (reconstruction) of bricks, as much aspossible・Replacement with new bricks needs to be executed withcautionIn this report, brick structures constructed by theBuildings Department of the former Ministry of Finance willbe dealt with fn 2 .2. The Somewhat Bizarre Measurements inArchitectural DrawingsIn the past, the author had a chance to survey a brickmasonry structure from the Meiji era of the Former BreweryInstitute’s Sake Factory. It is located in Takinogawa, KitaWard of Tokyo Prefecture and was designated as a nationalImportant Cultural Property in December 2014. This wasdesigned by Yorinaka Tsumaki, chief of the BuildingsDepartment, Ministry of Finance, who would later becomethe leading architect of governmental construction. Atthe Independent Administrative Institution The NationalResearch Institute of Brewing (Former Brewery Institute),the present owner of the facility, files of“documents on stateproperties”have been stored, which included the originalarchitectural drawings. In the floor plan (figure 1), werealized that the measurements given were very precise; thefigure at the bottom, which shows the width, is 56.82. Thismeans 56 shaku 8 sun 2 bu . A unit of bu is approximately3mm. On the left, the span is indicated to be 20.9625, whichis 20 shaku 9 sun 6 bu 2 rin 5 mo . A unit of mo is about0.15mm and for such a measurement to be shown in an1 2 34figure 1Former Brewery Institute’s Sake Factory（detail of floor plan）figure 2Former Brewery Institute's Brick Masonry Storehouse（floor plan）12Chapter 2Brick Masonry Construction: Techniques and Significance