CONTENTS

PAGE

Preface v

CHAPTER I

SCAFFOLDING

Scaffolding—Definition of—Northern system—Derrick stagings—Working platforms—South country system—Gantries, commonly called travellers—Travelling gantry—Gantries which serve as a base for lighter forms of scaffolding—Stagings—Pole scaffolds—Bricklayers’ scaffolds—Masons’ scaffolds—Connections 1-29

CHAPTER II

SCAFFOLDS FOR SPECIAL PURPOSES

Needle scaffolding—Scaffolds for chimney shafts, towers and steeples—Domes and arches—Swinging scaffolds—Painters’ boats—Boatswain’s boat—Ladder scaffolds—Supported painter’s boat 30-48

CHAPTER III

SHORING AND UNDERPINNING

Shoring—Flying shores—Raking shores—Underpinning 49-61

CHAPTER IV

TIMBER

Classification and structure—Defects in the living tree—Felling—Conversion—Seasoning—Description—Selection —Decay—Preservation—Durability—Use of scaffolding timber 62-75

CHAPTER V

CORDAGE AND KNOTS

Cordage—Strength of—Knots 76-89

CHAPTER VI

SCAFFOLDING ACCESSORIES AND THEIR USE

Ladders—Trestles—Cripples—Buckets and skips—Baskets—Barrows—Stone bogies—Hand barrows—Hods—Timber trucks—Sack trucks—Crates—Ashlar shears—Stone clips and slings—Stone lewises—Stone cramps—Wire and chain scaffold lashings—Tightening screws—Rollers—Levers—Dog irons—Bolts—Straps—Wire ropes—Chains—Slater’s truss—Duck runs—Mortar boards—Wedges—Nails—Spikes—Scaffolder’s hatchet 90-114

CHAPTER VII

THE TRANSPORT OF MATERIAL

Crane engines—The crane—Pulleys—Differential pulleys—Winch—Jibs—Shears—Gin—Rails—Sack trucks—Attachment of material—Ironwork—Timber —Bricks—Slates—Stone 115-130

CHAPTER VIII

THE STABILITY OF A SCAFFOLD

Stability—Wind pressures—Force of weight or gravity—To find the centre of gravity of a body—Two or more bodies—Of a dependent scaffold and the effect of loads upon it—Of a gantry—Of a Scotch derrick 131-142

CHAPTER IX

THE STRENGTH OF A SCAFFOLD

Failure of beams—Pillars and struts—Ties and traces—Dead loads—Live loads—Breaking weight—Safe load—Constants—Beams subject to a transverse strain—Posts and struts subject to compression—Braces and ties subject to a tensional strain 143-153

CHAPTER X

THE PREVENTION OF ACCIDENTS

Short ladders—Sagging of ladders—Guard rails—Well holes—Edge boards—Traps—Runs—Supports to centering—Damp cordage—Sound material—Competent control—Fan guards—Due care by workmen 154-160

CHAPTER XI

LEGAL MATTERS AFFECTING SCAFFOLDING

Scaffolding bye-laws—Burgh Police (Scotland) Act—Factory and Workshop Act, 1901—Abstract of same, issued from the Home Office—Notice of Accident Act—Report on Building Accidents by a Home Office Inspector—Workmen’s Compensation Act, 1906—Application of Act and definitions 161-178C

Appendix: Weight of Material 179

Index 183