Victor Buyck Steel Construction

Canary Wharf Building HQ2

Presentation Agenda

Project Over-view

Canary Wharf Standards

Interface concrete to steel

DLR Structure

Project Overview

• 1.65m sq ft of which approx 1m nett lettable office space

• 33 storey tower

• 9 storey podium building

• 5 storey air-rights structure over the DLR

• 3 storey concrete basement

Project Overview

• Simple & elegant massing• Uncompromising strength and

clarity

European Headquarters for Lehman Brothers

Project Overview

Adjacent West Winter Garden compliments the building

Project Overview

Curtain Wall:

• Delicate interplay between transparent glass and tapestry of stainless steel elements

• Provides texture and formal order

• Density of stainless steel elements increases towards top to form crowning gesture

Project Overview

• Concrete core, steel gravity frame

• Steel braced satellite cores in podium

• 9m x 13.5m steel grid

• 4.15m storey height increasing to 4.45 on trading floors

• Interface with HQ1, WWG, RT3, and station

Canary Wharf Standard

• Clear span column-free interior• separate structural and services

zones • Orthogonal corners (no curves!)

Primary objective is to provide space people will want to lease

Canary Wharf Standard

• ‘Standard’ false floor and floor to ceiling heights

• 130mm lightweight slab provides 90 minutes fire separation

• Separate structure & service zones

• Structural beam depths constrained to 470mm

• Plate Girders vs Trusses vs Westok beams etc.

Canary Wharf Standard

Key Design Issues:

• Core Issues – steel vsconcrete

• Floor vibration on long span beams

• Perimeter beam deflections – curtain wall stack joint is often critical design criteria

25 Canada Square (DS5)

Concrete/Steel Interface

Primary Issues:

• Overlap & sequencing• Connection Detail• Craneage

25 Canada Square (DS5)

Concrete/Steel InterfaceCorbel Details

HQ2

Concrete/Steel InterfaceCast-in Plate Detail

HQ2 Extension over DLR

LAUNCH DATA

• Maximum Launch Weight 468 Tonnes

• Skates 12 No 65 Tonne Capacity

• Maximum Recorded Load 22 Tonnes

• Maximum Coeff of Friction 5%

• Jack Capacity 2 x 15 = 30 Tonnes

• Typical Launch Speed 12m in 3 hours