目次
第Ⅰ部

CLT を用いた建築物の概要

第1章

CLT を用いた建築物 ................................................................................................................... 1

1.1

CLT とは ............................................................................................................................................................11.2

CLT の歴史と日本における取組.....................................................................................................................21.3

CLT を用いた建築物の魅力と特徴 .................................................................................................................4

第 2 章 本書の位置づけ ............................................................................................................................. 92.1

背景と本書の適用範囲.....................................................................................................................................92.2

本書の構成 ......................................................................................................................................................10

第Ⅱ部

CLT を用いた建築物の特徴と留意点

第 1 章 構法・構造性能 ........................................................................................................................... 121.1

CLT を用いた建築物の構造計算に関する法体系 .......................................................................................12

1.2

CLT パネルの剛性・強度 ..............................................................................................................................141.3

架構の構成と構造性能...................................................................................................................................16
1.3.1 架構の構成方法 ......................................................................................................................................16
1.3.2 架構の変形・耐力発現メカニズム ......................................................................................................21
1.3.3 標準的な接合方法 ..................................................................................................................................25

第 2 章 材料・耐久性 ................................................................................................................................ 282.1

直交集成板の材料規格...................................................................................................................................282.2直交集成板の許容応力度と材料強度 ...........................................................................................................342.2.1 概要 ....................................................................................................................................................342.2.2 繊維方向の許容応力度と材料強度 ................................................................................................342.2.3 めりこみの許容応力度と材料強度 ................................................................................................352.2.4 圧縮材の許容応力度と材料強度 ....................................................................................................36i

2.2.5 水分の作用に対する許容応力度と材料強度の低減 .................................................................... 362.2.6 直交集成板に固有な留意事項 ....................................................................................................... 362.3

基準強度 .......................................................................................................................................................... 37
2.3.1 概要 ................................................................................................................................................... 37
2.3.2 直交集成板に固有な留意事項 ....................................................................................................... 372.4

弾性係数 .......................................................................................................................................................... 372.5

建築基準法第 37 条に基づく直交集成板の品質基準 ................................................................................ 38

2.6

CLT パネル工法の耐久性 .............................................................................................................................. 38
2.6.1 概要 ................................................................................................................................................... 38
2.6.2 耐久性を確保するうえでの留意事項............................................................................................ 39

第 3 章 防火 .....................................................................................................................................................40

3.1

CLT を用いた建築物の防火上の特徴 .......................................................................................................... 40

3.2

CLT を用いた建築物の防火上の留意点 ...................................................................................................... 40

第 4 章 施工計画 ...........................................................................................................................................42

4.1

CLT パネルの特徴と施工計画 ...................................................................................................................... 42

4.2

仮設計画と養生 .............................................................................................................................................. 42

4.3

受け入れ検査と建入れ検査 .......................................................................................................................... 42

4.4

安全対策 .......................................................................................................................................................... 42

4.5

アンカーボルトとその設置精度 .................................................................................................................. 43

4.6

建方 .................................................................................................................................................................. 43

4.7

建方精度 .......................................................................................................................................................... 44

付録 1第Ⅲ部

振動台実験における耐震性能・損傷状態 .......................................................................... 45

構造設計第 1 章 はじめに ...........................................................................................................................................57
第 2 章 構造計算の前提条件 .................................................................................................................59

2.1

適用範囲 .......................................................................................................................................................... 59
2.1.1 対象とする工法 ............................................................................................................................... 59ii

2.1.2 壁パネルの分類 ................................................................................................................................59
2.1.3 架構形式 ............................................................................................................................................60
2.1.4 技術基準告示外の制限 ....................................................................................................................65
2.2使用できる構造材料.......................................................................................................................................66
2.2.1

CLT パネル ........................................................................................................................................66

2.2.2 柱・梁 ................................................................................................................................................66
2.2.3 接合部に用いる材料 ........................................................................................................................67
2.3

構造計算ルート...............................................................................................................................................68

第 3 章 設計用構造モデルの構成方法及び応力検定方法 ................................................... 72

3.1

設計用構造モデルの構成方法 .......................................................................................................................72
3.1.1 構造モデルの種類 ..............................................................................................................................72
3.1.2 鉛直構面の構成方法..........................................................................................................................74
3.1.3 水平構面の構成方法..........................................................................................................................90
3.1.4 在来工法による鉛直構面・水平構面のモデル化 ..............................................................................933.2

応力検定方法 ..................................................................................................................................................94
3.2.1 CLT パネル応力度の計算方法 ..........................................................................................................94
3.2.2 鉛直構面 CLT パネルの検定方法 .....................................................................................................95
3.2.3 水平構面 CLT パネルの検定方法 .....................................................................................................97
3.2.4 接合部の検定方法 .............................................................................................................................99
3.2.5 在来工法による鉛直構面・水平構面の検定方法 ............................................................................100
3.2.6 直交壁効果を保証するための検定方法 ..........................................................................................101

3.3

CLT パネルの剛性・強度 ............................................................................................................................102
3.3.1 CLT パネルの弾性係数・基準強度 ..................................................................................................102
3.3.2 小開口を有する CLT パネルの剛性・強度 ......................................................................................106

第 4 章 各ルート共通の構造計算 ..................................................................................................... 108

4.1

令第 82 条各号の構造計算 ...........................................................................................................................108
4.1.1 荷重・外力 .........................................................................................................................................1084.1.2 応力計算 ［令第 82 条第一号］ ....................................................................................................... 117
4.1.3 応力検定 ［令第 82 条第三号］ .......................................................................................................120
4.1.4 使用上の支障防止 ［令第 82 条第四号、平 12 建告第 1459 号］ .................................................120
4.1.5 その他の留意事項 ............................................................................................................................1204.2

層間変形角 ［令第 82 条の 2］ ..................................................................................................................1214.3

剛性率・偏心率の確認 ［令第 82 条の 6 第二号］ .................................................................................121
4.3.1 剛性率 ...............................................................................................................................................121iii

4.3.2 偏心率 .............................................................................................................................................. 121
4.4

屋根葺き材等の構造計算 ［令第 82 条の 4, 平 12 建告第 1458 号］................................................... 123
4.4.1 風圧力に対する検定 ........................................................................................................................ 123
4.4.2 地震力に対する検定 （限界耐力計算の場合のみ） ...................................................................... 128

4.5地盤・基礎 .................................................................................................................................................... 129
4.5.1 地盤・基礎の設計方針 ..................................................................................................................... 129
4.5.2 地盤・杭の許容耐力 ......................................................................................................................... 129

第 5 章 保有水平耐力計算（ルート 3） ......................................................................................1305.1

ルート 3 の構造計算概要 ............................................................................................................................ 130

5.2

保有水平耐力の確認 .................................................................................................................................... 130
5.2.1 保有水平耐力の計算 ［令第 82 条の 3 第一号］ ........................................................................... 130
5.2.2 必要保有水平耐力の計算 ［令第 82 条の 3 第二号］ ................................................................... 131

第 6 章 許容応力度等計算（ルート 2） .......................................................................................1346.1

ルート 2 の構造計算概要 ............................................................................................................................ 134

6.2

地震時応力割増し係数 ................................................................................................................................ 134

6.3

靭性保証 ........................................................................................................................................................ 135

第 7 章 許容応力度計算（ルート 1） ...........................................................................................1367.1

ルート 1 の構造計算概要 ............................................................................................................................ 136

7.2

応力計算 ........................................................................................................................................................ 136
7.2.1 耐力壁の水平耐力の検定 ............................................................................................................... 136
7.2.2 水平構面の面内耐力の検定 ........................................................................................................... 138
7.2.3 基礎梁の水平力作用時応力計算 ................................................................................................... 139
7.2.4 その他の応力計算 ........................................................................................................................... 140

7.3

偏心率 ............................................................................................................................................................ 140

第 8 章 限界耐力計算 ...............................................................................................................................1418.1

限界耐力計算の構造計算概要 .................................................................................................................... 141

8.2

安全限界変位の上限値等［限界耐力計算告示第 6, 7］ ......................................................................... 1418.3

減衰定数 ........................................................................................................................................................ 142iv

第9章

CLT パネル工法における接合部の強度性能 ........................................................... 143

9.1

CLT パネル工法における接合部の概要 .....................................................................................................1439.2

告示で要求されている接合部の要求性能 .................................................................................................1449.3

構造計算ルート 1 に対応した接合部の強度性能 .....................................................................................146

9.4

構造計算ルート 1 以外の接合部の強度性能 .............................................................................................154
9.4.1 鋼板添え板ビス接合 .........................................................................................................................154
9.4.2 引きボルト接合 ..................................................................................................................................162

9.5

接合金物の耐久性.........................................................................................................................................168

第 10 章

CLT パネル工法における接合部試験・評価方法 .............................................. 169

10.1

総則 ..............................................................................................................................................................16910.2

試験体材の選択方法...................................................................................................................................16910.3

接合部の引張試験.......................................................................................................................................171
10.3.1 試験の種類 .....................................................................................................................................171
10.3.2 試験体の作製及び設置方法 ..........................................................................................................172

10.4

接合部のせん断試験...................................................................................................................................175
10.4.1 試験の種類 .....................................................................................................................................175
10.4.2 試験体の作製及び設置方法 ..........................................................................................................17610.5

試験方法 ......................................................................................................................................................178

10.6

評価方法 ......................................................................................................................................................179
10.6.1 試験機関が行う評価方法 ...............................................................................................................179
10.6.2 設計者もしくは評価機関等が行う評価方法 ...................................................................................182

第 11 章

CLT の部分的利用・併用構造の扱い ....................................................................... 187

11.1 鉄骨造建築物への CLT 利用について ......................................................................................................18711.1.1 鉄骨造建築物の床への利用 ..........................................................................................................18711.1.2 鉄骨造建築物の壁への利用 ..........................................................................................................188
11.1.3 鉄骨造との併用構造 .......................................................................................................................189
11.2 鉄筋コンクリート造建築物への CLT 利用について ..............................................................................191
11.2.1 鉄筋コンクリート造建築物への床、壁としての利用 ........................................................................191
11.2.2 鉄筋コンクリート構造と CLT パネル構造の立面併用構造 ............................................................193
11.3 木造軸組構法建築物への CLT 利用について ..........................................................................................194
11.3.1 木造軸組構法建築物の床への利用 ..............................................................................................194
11.3.2 木造軸組構法建築物の壁への利用 ..............................................................................................197v

11.3.3 木造軸組構法建築物の仕様規定への適用 ................................................................................. 200

付録 1付録 2

有開口壁パネルの開口周辺の剛性・強度 ........................................................................ 201
CLT パネル・接合部の軸耐力と曲げ耐力の関係 ........................................................... 203

第Ⅳ部

材料と耐久性第 1 章 材料 ...................................................................................................................................................2121.1

許容応力度及び材料強度 ............................................................................................................................ 212
1.1.1 強軸方向と弱軸方向、及び、積層方向と幅方向 ............................................................................ 212
1.1.2 適用範囲........................................................................................................................................... 212
1.1.3 圧縮、引張、曲げ、せん断の許容応力度 ....................................................................................... 212
1.1.4 めりこみの許容応力度 ..................................................................................................................... 213
1.1.5 圧縮材（座屈）の許容応力度 ........................................................................................................... 213
1.1.6 圧縮、引張、曲げ、せん断の材料強度 ........................................................................................... 214
1.1.7 めりこみの材料強度 ......................................................................................................................... 214
1.1.8 圧縮材（座屈）の材料強度 ............................................................................................................... 215
1.1.9 水分の作用に対する許容応力度と材料強度の低減 ...................................................................... 215

1.2

基準強度 ........................................................................................................................................................ 216
1.2.1 圧縮 .................................................................................................................................................. 216
1.2.2 引張 .................................................................................................................................................. 218
1.2.3 積層方向の曲げ ............................................................................................................................... 220
1.2.4 幅方向の曲げ ................................................................................................................................... 222
1.2.5 積層方向のせん断の基準強度 ....................................................................................................... 223
1.2.6 幅方向のせん断の基準強度 ........................................................................................................... 226
1.2.7 めりこみの基準強度 ......................................................................................................................... 229
1.2.8 基準強度一覧................................................................................................................................... 230

1.3弾性係数 ........................................................................................................................................................ 233
1.3.1 圧縮 .................................................................................................................................................. 233
1.3.2 引張 .................................................................................................................................................. 235
1.3.3 積層方向の曲げ ............................................................................................................................... 237
1.3.4 幅方向の曲げ ................................................................................................................................... 239
1.3.5 積層方向のせん断弾性係数 ........................................................................................................... 241
1.3.6 幅方向のせん断弾性係数 ............................................................................................................... 242
1.3.7 たわみ計算 ....................................................................................................................................... 243
1.3.8 弾性係数一覧................................................................................................................................... 245

1.4

建築基準法第 37 条に基づく CLT の品質基準 ......................................................................................... 246

vi

1.4.1 指定建築材料とは .............................................................................................................................246
1.4.2 国土交通大臣が指定した規格 .........................................................................................................246
1.4.3 CLT の品質基準 ...............................................................................................................................246
1.4.4 品質検査 ...........................................................................................................................................248
1.4.5 その他................................................................................................................................................248

第2章

2.1

CLT パネル工法の耐久性 .................................................................................................... 249

耐久性確保の留意点.....................................................................................................................................249
2.1.1 概要 ...................................................................................................................................................249
2.1.2 構造躯体に水分（湿分）を浸入させない対策 ..................................................................................250
2.1.3 仮に構造躯体に水分（湿分）が浸入しても、浸入した水分（湿分）を排出させる対策 ....................250
2.1.4 材料の耐朽・耐蟻性..........................................................................................................................250
2.1.5 維持管理 ...........................................................................................................................................253

2.2材料の耐朽・耐蟻性.....................................................................................................................................253
2.2.1 構造耐力上主要な部分に使用される CLT パネルの防腐・防蟻措置 ............................................253
2.2.2 土台を設ける場合 .............................................................................................................................255

2.3

防湿・防水対策.............................................................................................................................................255
2.3.1 概要 ...................................................................................................................................................255
2.3.2 構造躯体に水分（湿分）を浸入させない対策 ..................................................................................255
2.3.3 仮に構造躯体に水分（湿分）が浸入しても、浸入した水分（湿分）を排出させる対策 ....................257

2.4

維持管理 ........................................................................................................................................................257
2.4.1 概要 ...................................................................................................................................................257
2.4.2 点検 ...................................................................................................................................................258
2.4.3 維持管理 ...........................................................................................................................................258

第Ⅴ部

防耐火設計

第 1 章 防耐火設計の概要 .................................................................................................................... 259

1.1

建築物に要求される防火性能 .....................................................................................................................259
1.1.1 用途 ...................................................................................................................................................259
1.1.2 規模 ...................................................................................................................................................261
1.1.3 地域区分 ...........................................................................................................................................261

1.2

建築物の防耐火性能.....................................................................................................................................262
1.2.1 耐火建築物、準耐火建築物、その他建築物等 ...............................................................................262
1.2.2 主要構造部の防・耐火性能 ..............................................................................................................265vii

1.2.3 防火区画等....................................................................................................................................... 265
1.2.4 内装制限等....................................................................................................................................... 268
1.2.5 避難規定等....................................................................................................................................... 269

第 2 章 燃えしろ設計 ...............................................................................................................................270

2.1

燃えしろ設計の概念 .................................................................................................................................... 270

2.2

火災時における主要構造部の耐力、残存厚さ ........................................................................................ 271
2.2.1 火災時の炭化速度と残存断面 ........................................................................................................ 271
2.2.2 要求性能と火災外力（要求耐火時間、加熱面）の設定 .................................................................. 275
2.2.3 主要構造部の遮熱、遮炎性能 ........................................................................................................ 280
2.2.4 壁、床、屋根（耐力部材）の火災時の耐火性能 .............................................................................. 283
2.2.5 接合部の耐火性能 ........................................................................................................................... 290
2.2.6 貫通部・開口部の防火措置 ............................................................................................................. 294
2.2.7 燃えしろ設計した壁・床・屋根の表面仕上げ .................................................................................. 295

第 3 章 防火被覆設計 ...............................................................................................................................296

3.1

防火構造 ........................................................................................................................................................ 297

3.2

準耐火構造（45,60 分） .............................................................................................................................. 298

3.3

耐火構造 ........................................................................................................................................................ 308

第Ⅵ部

施工

第 1 章 施工計画 .........................................................................................................................................309

1.1施工計画 ........................................................................................................................................................ 309
1.1.1 施工計画の立案・作成 ..................................................................................................................... 309
1.1.2 発注条件 発注条件書・見積条件書 .............................................................................................. 310
1.1.3 工程計画........................................................................................................................................... 311
1.1.4 品質管理計画書の作成 ................................................................................................................... 312
1.1.5 輸送計画........................................................................................................................................... 312

1.2

検査 ................................................................................................................................................................ 313
1.2.1 受け入れ検査 ................................................................................................................................... 313
1.2.2 建入れ検査....................................................................................................................................... 314

1.3

BIM の活用 ................................................................................................................................................... 315viii

1.3.1 BIM の概要 .......................................................................................................................................315
1.3.2 CoCoCLT における BIM の活用 ......................................................................................................316

第 2 章 製造・加工 .................................................................................................................................... 318

2.1

CLT の製造 ....................................................................................................................................................318
2.1.1 製作工程 ...........................................................................................................................................318
2.1.2 ラミナの品質 ......................................................................................................................................319
2.1.3 CLT の構成 .......................................................................................................................................320
2.1.4 接着剤 ...............................................................................................................................................321
2.1.5 堆積作業 ...........................................................................................................................................321

2.2工場加工 ........................................................................................................................................................322
2.2.1 成形加工 ...........................................................................................................................................322
2.2.2 仕口加工 ...........................................................................................................................................322
2.2.3 加工機の標準仕様と共通 CAM ファイル ........................................................................................324

2.3

製品検査 ........................................................................................................................................................324
2.3.1 工程管理 ...........................................................................................................................................324
2.3.2 品質管理 ...........................................................................................................................................324
2.3.3 製品・加工寸法、外観検査 ...............................................................................................................325
2.3.4 工具管理 ...........................................................................................................................................325

2.4

保管・梱包 ....................................................................................................................................................326
2.4.1 養生塗装 ...........................................................................................................................................326
2.4.2 梱包・仕分け......................................................................................................................................326
2.4.3 保管 ...................................................................................................................................................326

第 3 章 建方 ................................................................................................................................................... 327

3.1

建方計画 ........................................................................................................................................................327
3.1.1 建方計画 ...........................................................................................................................................327
3.1.2 配置計画（重機・材料・地組） ...........................................................................................................330
3.1.3 重機計画 ...........................................................................................................................................330
3.1.4 建方用足場 .......................................................................................................................................331
3.1.5 養生（搬入時・建方中・建方後） .......................................................................................................331
3.1.6 安全計画（安全設備・安全対策） .....................................................................................................332
3.1.7 耐久性の確保 ...................................................................................................................................334

3.2

アンカーボルトの設置と精度 .....................................................................................................................335
3.2.1 アンカーボルトの設置 .......................................................................................................................336
3.2.2 施工精度と接合金物.........................................................................................................................338ix

3.3

建方 ................................................................................................................................................................ 339
3.3.1 地組・金物取付け ............................................................................................................................. 339
3.3.2 揚重作業........................................................................................................................................... 342
3.3.3 架設順序........................................................................................................................................... 344
3.3.4 仮留め方法 ....................................................................................................................................... 346
3.3.5 接合具の本締め ............................................................................................................................... 347
3.3.6 建方用工具類................................................................................................................................... 349

3.4

建方精度 ........................................................................................................................................................ 352
3.4.1 躯体精度の向上 ............................................................................................................................... 352
3.4.2 建入れ直し ....................................................................................................................................... 353
3.4.3 建入れ精度....................................................................................................................................... 353
3.4.4 作成書類・提出書類 ......................................................................................................................... 354x

付録（DVD-ROM 収録）

関連資料

第Ⅰ部 設計にあたっての参考資料
第 1 章 構造設計例
1.1 構造設計例Ⅰ（ルート 1）―許容応力度等計算：2 階建て戸建て住宅―
1.2 構造設計例Ⅱ（ルート 2）―許容応力度等計算：3 階建て共同住宅―
1.3 構造設計例Ⅲ（ルート 3）―保有水平耐力計算：4 階建て事務所―
1.4 構造設計例Ⅳ（限界耐力計算）―4 階建て事務所―
1.5 構造設計例Ⅴ（ルート 1、ルート 2、ルート 3）－共同住宅―
1.6 設計図例
1.7 ルート 2、3 におけるモデル化・解析等の具体的方法
第 2 章 接合部データ等
第 3 章 施工関連の参考資料 （建方動画、BIM モデル）xi