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372 Barry’s Advanced Construction of Buildings Adjustable column clamps Reinforcement Adjustable column clamps Adjustable prop Photograph 6.2 Square column formwork systems.
Structural Concrete Frames 373 Edge protection Formwork beam Quick release adjustable prop Rotating laser level Photograph 6.3 Prop and beam formwork. Horizontal formwork It is becoming common to use patented formwork systems to cast large concrete floor slabs. These either take the form of plywood decks, fixed to steel or aluminium bearers, which are held in position by interlinked and braced adjustable props (Photograph 6.3). Figure 6.21, Figure 6.22, Figure 6.23, Figure 6.24 and Figure 6.25 provide a sequence of events for the erection of prop, beam and panel formwork. Alternatively, table formwork can be used. The advantage of table formwork is that the supporting structure is already partly assembled as a braced table. The table can be hoisted by crane into the building and wheeled into position, before being properly secured. Where the concrete floor differs in soffit level, due to dropdown beams, additional props can be used to the formwork pieces that make up the beam (Figure 6.21). To reduce the time that the main floor formwork is needed and the subsequent cost of hiring the formwork, intermediate props are used between the main formwork. The system of table and props is positioned, fixed in place and the concrete is then poured. Once the concrete has reached sufficient maturity, the majority of the horizontal support is removed. The intermediate props remain in position, continuing to provide support to the concrete slab. The table formwork or the system of beams can be removed early, cleaned and quickly used on the next floor. The props that are used to provide the longer-term support are usually designed to support both the concrete slab and the beams that support the main horizontal formwork. To ensure that the beams and the main horizontal formwork can be released early, the
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BARRY’S ADVANCED CONSTRUCTION OF
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This edition first published 2014 T
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vi Contents 6 Structural Concrete F
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Acknowledgements Over the years our
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1 Introduction In Barry’s Introdu
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Introduction 3 Photograph 1.1 Frame
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Introduction 5 (2) Positional toler
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Introduction 7 some of the factors
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Introduction 9 Photograph 1.2 Artif
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Introduction 11 on legislation, oth
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Introduction 13 allow for innovatio
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2 Scaffolding, Façade Retention an
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Scaffolding, Façade Retention and
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3 Ground Stability, Foundations and
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Ground Stability, Foundations and S
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Where the ground is susceptible to
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Heavy pad reinforcement Reinforceme
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Photograph 3.3 Driven precast concr
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(a) (b) Photograph 3.6 (a) A drop a
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Working direction Hopper and cellul
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Infill concrete packing applies pre
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Reinforced structural concrete base
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4 Single-Storey Frames, Shells and
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Single-Storey Frames, Shells and Li
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Portal rafter Plate welded to rafte
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Zed purlins Washer plate bolted to
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Sheeting rails for cladding Steel r
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Photograph 4.12 Lattice column to b
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Side lap of sheeting Sheeting screw
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Outline of straight line limited hy
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5 Structural Steel Frames Structura
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Structural Steel Frames 275 penetra
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Structural Steel Frames 277 calcula
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Structural Steel Frames 279 The lim
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Structural Steel Frames 281 420.5-
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Structural Steel Frames 283 no stro
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Structural Steel Frames 285 Channel
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One-way span floor and roof slabs R
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Structural Steel Frames 289 A disad
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Structural Steel Frames 291 Rib bea
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Structural Steel Frames 293 Timber
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Structural Steel Frames 295 Horizon
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Structural Steel Frames 297 Concret
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Beam End plate welded to beam Colum
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Structural Steel Frames 301 Cap pla
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Structural Steel Frames 303 Bearing
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Structural Steel Frames 305 Bolt fa
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Structural Steel Frames 307 Electro
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Structural Steel Frames 309 Types o
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Structural Steel Frames 311 Weld fa
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Structural Steel Frames 313 beam en
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Structural Steel Frames 315 Column
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A timber profile is cut to the same
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Structural Steel Frames 319 Square
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Page 423 and 424: 7 Cladding and Curtain Wall Constru
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Cladding and Curtain Wall Construct
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Stainless steel restraint cramps fi
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15 mm Cladding and Curtain Wall Con
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Roof support Roof or eaves level La
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Prefabrication and Off-Site Product
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The finished hospital looks no diff
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Lifts and Escalators 515 ❏ ❏
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Lifts and Escalators 517 will be bu
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Lifts and Escalators 519 hydraulic
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Lifts and Escalators 521 ❏ ❏
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Lifts and Escalators 523 FFL Lift c
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Lifts and Escalators 525 Climbing f
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Lifts and Escalators 527 Above 30 m
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Lifts and Escalators 529 Photograph
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Fit Out and Second Fix 531 cabinets
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Fit Out and Second Fix 533 ❏ ❏
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Fit Out and Second Fix 535 Four-way
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Fit Out and Second Fix 537 Services
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Fit Out and Second Fix 539 Wire han
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Fit Out and Second Fix 541 tiles ar
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Fit Out and Second Fix 543 Metal st
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Fit Out and Second Fix 545 Multiple
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11 Building Obsolescence and Revita
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Building Obsolescence and Revitalis
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Appendix B: Additional References C
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Index Access from heights, 42 Acces
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Index 567 Innovation, 505 Inspectio
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Index 569 Suspended frameless glazi
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