C.N. Mindham
Wiley | 1405139633 | 2006 | PDF | 256 pages | 4 Mb

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Full of detailed construction drawings, this book covers cut roofs, bolted truss roofs, trussed rafter roofs, trimmed openings and ventilation.

A major section deals with loft to attic room conversions, giving guidance on planning procedures, as well as dealing with structural matters and specifying conversion work.

The Fourth Edition features a new chapter covering the growing number of engineered timber components available in the house building industry. The use of I beams and roof cassettes is detailed for roof and room–in–the–roof construction. The text has been fully updated to current standards and features additional detailed construction drawings. The chapters on attic conversion and construction have been expanded and a new attic conversion decision flow chart added.

The book will prove invaluable to architects, house builders, roof carpenters, building control officers, trussed rafter manufacturers and students of building technology.

The Author

C.N. Mindham BSc has had a wide experience in the construction industry. After three years with TRADA as Eastern Regional Officer, he spent 11 years developing a timber engineering business to become one of the country′s largest producers of trussed rafters.

He became Managing Director of a company designing and manufacturing trussed rafters, joinery and prefabricated timber buildings, a post he held for eight years. Subsequently he started his own consultancy for the timber industry which has led him to his current position as Managing Director for a joinery and engineering company.


1 The Development of the Pitched Roof 1
Primitive roof forms 1
The coupled roof 1
Stability 3
Ceilings 6
Trusses 7
Design for economy 9
Standard design roofs 9
Bolt and connector joints 10
Trussed rafters 11
Cost advantages 11
Legislation 13

2 Roof Shapes and Terminology 18
Terminology 23

3 The ‘Traditional’ or ‘Cut’ Roof 26
Design 26
The common rafter and purlin roof 28
The hip roof 32
The mono pitch roof truss 35
The valley structure 36
Attic roofs 37
Roof lights and roof windows 48
Additional design considerations 48

4 Attic Construction Using Modern Engineered Timber Components 52
The floor 52
Attic construction using engineered timber components 57

5 Bolted Truss Roof Construction 71
The joints 71
Truss assembly 72
The split-ring connector 74
Accuracy 75
Standard designs 75
The roof construction 75
Bolted truss hips 77
Valleys 77
Structural openings 80
Roof stability 80

6 The Construction of Trussed Rafter Roofs 82
Performance in use 82
Design 85
Design information 86
Quality control 88
Inspection and quality assurance 94
The construction of a trussed rafter roof 96
Hip end roofs 103
Valleys and intersecting roofs 103
Trimmings for openings 109
Attic and loft roofs 109
Openings for dormers, roof windows and stairwells in attic
trussed rafter roofs 117
Bracing the attic trussed rafter roof 119
Trussed rafter shapes 122

7 Truss Plate Systems 123
Systems available 123
Computer programs 125
Training 128
Technical data 130
Metalwork 131
Hip roof construction 131
Valleys 138
Attic trusses 141
Raised tie trusses 143
Punched nail plate joists, rafters and purlins 145
Future developments 148

8 Roof Construction Detailing 150
General 150
Storage and handling of timber and timber components 150
Preservative treatment 157
Wall plates and fixings 160
Gable ends, ladders, gable restraints and separating walls 166
Water tank platforms 174
Ventilation of roof voids 178
Bracing 180
Eaves details 186
Trimming small openings 192
Infi ll 195

9 Loft Conversions 198
Development of the loft 198
The early attic 199
Floors and ceilings 201
Cottages 202
Wasted space 202
The final blow 203
Examining conversion possibilities 204
Decision making considerations 204
Typical roof types 205
Letting in light 210
Can we stand up? 219
Valley 219
Access to the attic 220
The last resort 221

10 Obligations – Visual Impact on Your Home 222
The planning application 224
The structural impact on the home 225

11 The Conversion 227
Making a start 227
The survey 227
Plans and specification 228
Writing the specification 229
Impact on occupants during conversion 230
Builders’ stores and materials 231

12 Solutions 232
Basic accommodation 232
The common roof 233
Bolted truss and trussed rafter roofs 235
Roof replacement 236
Ventilating the roof void 237
Openings for dormers and roof windows 240
Conclusions 240
Bibliography, Standards and Technical References 241
Index 245


"A thorough rundown of the various types of roof currently in use, with easy -to-read diagrams to make sense of it all … useful." (Build It, December 2008)
"A thorough rundown of the various types of roof currently in use, with easy -to-read diagrams to make sense of it all … particularly useful if you have a tricky space to convert." (Build It, December 2008)

"easy to read and concise … an excellent book" (Building Engineer)

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