Buildings of Earth and Straw : Structural Design for Rammed Earth and Straw Bale Architecture

Buildings of Earth and Straw : Structural Design for Rammed Earth and Straw Bale Architecture

Author(s): Bruce King

Publisher: Chelsea Green

ISBN: 0964471817

Order From: Amazon.com
(links will open in a new window)

Buildings of Earth and Straw : Structural Design for Rammed Earth and Straw Bale Architecture

Paperback, 169 pages
Publication date: April 1997

Chelsea Green’s The Rammed Earth House and The Straw Bale House chronicle the possibilities and realities of straw bale and rammed earth construction. Buildings of Earth and Strawfills in the gaps for professional builders, contractors, engineers, inspectors, lenders, and architectural students. It includes special construction requirements of earth and straw, design capabilities and limitations of these materials, and documentation of testing data for use in addressing the concerns of officials. This book offers the nuts and bolts of rammed earth and straw bale building techniques, and why they are so spectacular, durable, and earth-friendly.

Review

“Bruce King has produced a book that is both long overdue and quite timely. While I find most technical books to be dry, uninteresting, and difficult to read, Bruce has managed to provide technical information in an accessible and entertaining manner. Although parts of his book will admittedly require engineering training to understand, even the uninitiated builder will find a wealth of usable material here.”
Bob Fowler, FAIA, PE, PBO past Chairman, International Conference of Building Officials, founding member, International Codes Council

“A revolution in environmentally friendly house construction is arriving. In this book, Bruce King explores the details and methods for building durable and safe earth and straw houses.”
Sim Van der Ryn, Architect, Educator, Author of Ecological Design

 

Table of Contents

Preface

Introduction

Who Would Want to Read This Book, and Why?
Earth and Straw: Natural Companions
What We Will and Will Not Talk About
A Footnote About Bamboo…

Part One: BASICS

Abbreviations and Acronyms
Glossary
Structures and Forces

Physical Forces That Act On Structures
Some Other Variables
Foundations
Gravity Loads
Lateral Loads
In-plane Forces
Out-of-plane Forces
Earthquake Loads
Other Lateral Force Systems

Part Two: EARTH

The Material

Stabilized Earth
Rammed Earth
Gunearth
Stabilized Earth Mix Design–A Case Study

density and chemistry tests
compressive strength tests
moisture exposure tests
bond strength tests
fastener tests
admixture tests
absorptivity tests
erosion and wear resistance tests
Analysis

Design in Non-seismic Areas
Design in Seismic Areas
Foundations
Bond Beams
Lateral Loads
Analysis Method
Design and Construction Considerations

Stabilized Earth
Rammed Earth
Gunearth
Sample Calculations

Case 1: Seismic zone 2B

check h/t ratio
axial compressive stress at top of footing
Case 2: Seismic zone 4, wall cantilevered

check h/t ratio
horizontal earthquake load
compressive bending stress
shear stress
tensile bending stress in reinforcing
Case 3: Seismic zone 4, same wall restrained at top

horizontal earthquake load
design fc
compressive bending stress
shear stress
tensile bending stress in reinforcing
wall connection at top
Conclusions
Appendix E-1: Soil References
Appendix E-2: Soil-cement References
Appendix E-3: Sample Specification

Part Three: STRAW

The Material

Straw
Bales
Bale Variables
Bale Wall Types
Test Results–Straw Bale and Wall Properties

Bou-Ali test, Tucson, Arizona
SHB AGRA test, Albuquerque, New Mexico
Ship Harbour Project test, Nova Scotia
Fibrehouse Limited test, Ottawa, Ontario
Analysis

Load-bearing Straw-bale Walls
Gravity (Vertical) Loading
Lateral Loading: Wind
Lateral Loading: Earthquake
Non-load-bearing Straw-bale Walls
Design and Construction Considerations

Bales and Pinning
Wall Settling
Moisture
Fire
Sample Calculations

Case 1: Load-bearing Walls

design for bale bearing and precompression
check plaster skin in compression
design for out-of-plane shear
design for in-plane shear
Case 2: Non-load-bearing Walls

design for bale bearing and precompression
design for out-of-plane shear
design for in-plane shear
Conclusions
Appendix S-1: Straw Panels

Pyramod International, Inc., City of Industry, California
Stramit, U.S.A. L.L.C., Perryton, Texas
BioFab, Redding, California
Meadowood, Albany, Oregon
Conclusions
Appendix S-2: California Straw-bale Code
References

General
Stabilized Earth
Straw
Seismic Zone Map of the United States
Unit Conversion Tables

Base Units
SI Prefixes
SI Derived Unites with Special Names
Conversion Factors

Index