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Emtunga Offshore AB Emtunga Offshore AB Emtunga Offshore AB Emtunga Offshore AB Lightweight construction application at sea LSS Lightweight in Living Quarters SP, Bors, Sweden 31-OCTOBER-2007 Peo Svrd Emtunga Offshore AB Emtunga

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Emtunga Offshore AB Emtunga Offshore AB

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Emtunga Offshore AB Emtunga Offshore AB

Lightweight construction application at sea LÄSS Lightweight in Living Quarters

SP, Borås, Sweden

31-OCTOBER-2007

Peo Svärd

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Emtunga Offshore AB Emtunga Offshore AB

  • What is a Living Quarter
  • Fabrication - Modular concept
  • Why lightweight
  • Weight of a Living Quarter
  • Weight saving in a Living Quarter
  • Aluminum design
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What is a Living Quarter? What is a Living Quarter?

  • A living Quarter consists of:

– Accommodation for crew – Safe area (Fire/gas/blast) – Dining area – Recreation – Central Control Room – Airport (baggage handling, sky lobby, etc) – Medical center – Office – Galley – Laundry – 20-250 POB – 500-4000m2 – 250-2000 metric ton

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What is a Living Quarter? What is a Living Quarter?

  • Characteristics
  • Assembly phase
  • Load out
  • Sea transport
  • Installation (Lifting/skidding/etc.)
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What is a Living Quarter? What is a Living Quarter?

Load out Helideck On barge

Installation

Testing

Sea tranport

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Overview – Modular concept Overview – Modular concept

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Why lightweight? Why lightweight?

  • Customer requirements

– Increased capacity – POB – Modification – New regulations – HSE requirements (regulations/Company)

  • Challenge – Cover all new requirements using

same support structure.

  • This trend are global – Lightweight is

important

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Why lightweight Why lightweight

  • Investment in modification project in Norway

are expected to increase by near 100% next 8 years.

Modification market in Norway only

5 000 10 000 15 000 20 000 25 000 30 000 35 000 40 000 1996 1997 1998 1999 2000 2001 2002 2003 2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 2015 Million [SEK]

  • This trend are global – Lightweight design has a

market

50% Production increase 25% HSE 25% Maintain integrity

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Weight of a Living Quarter Weight of a Living Quarter

  • Weight drivers

– Temporary construction phases – Blast requirements – Deformations – Fire and Gas requirements – Wall panels – External items (HD, staircases, walkways, platforms, laydown areas.

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Weight of a Living Quarter Weight of a Living Quarter

Weight distribution in a LQ (typical)

  • Hot spots

– Structure – Temporary phases – Architectural – wall panels

Reference project 1000 ton Stressed skin by Emtunga Structure Archutect ural HVAC EIT Piping Total Exteral Items Helideck UDW 180 125 20 15 5 345 % 52 36 6 4 1 100 Weight 470 326 52 39 13 1000 40 60

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Weight saving in a Living Quarter Weight saving in a Living Quarter

  • Structure

– High strength steel

  • Applicable in a few areas since deformation is the

driver.

  • Possible items is limited to lifting points/support

points.

– Aluminum

  • 1/3:rd weight and 1/3 stiffness - equal?
  • Form section properties that is suitable for
  • deformation. d=5*qL^4/384/E/I
  • The structure is approximately a factor of 3 more

expensive compared to steel

  • Longer lead time
  • Require more Passive Fire Protection
  • Typical structural weight saving is 25% compared to
  • steel. Overall weight saving is 12-13%
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Weight saving in a Living Quarter Weight saving in a Living Quarter

  • Wall panels

– Saving is up to approximately 3 % – Generates questions from customer regarding references, certification, etc. but possible – Rule of thumb – heavy material good acoustic properties…….! – Can be adopted for both aluminum and Steel alternative

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Weight saving in a Living Quarter Weight saving in a Living Quarter

  • Temporary construction phases

– Newer accept that temporary phases adds on structural material that are dead weight during in-place operation – Focus on (Spend money on):

  • temporary structures
  • Lifting aids
  • Installation aids
  • Bottom lift

– Weight saving is ~6%

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Weight saving in a Living Quarter

UPPER LATERAL SUPPORT FOR SEA FASTENING DURING TRANSPORT LOWER LATERAL SUPPORT FOR SEA FASTENING DURING TRANSPORT BASEFRAME VERTICAL SUPPORT FOR SEA TRANSPORT BARGE

Loadout Sea transport Installation

  • Temporary construction phases
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Weight saving in a Living Quarter

Bad example !!

  • Temporary construction phases
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Weight saving in a Living Quarter Weight saving in a Living Quarter

  • Weight saving on hot spots

– Using aluminum structure ~13% – Temporary construction phases ~6% – Using light weight wall panels ~3% Total: ~22%

  • It should be noted that additional weight

saving is possible in the support structure.

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Aluminum design Aluminum design

  • Focus on aluminum solution and wall

panels in LÄSS project

– New structural design adopted to modular construction (Emtunga) – Development in conjunction with SAPA

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Aluminum design Aluminum design

  • Basic panel alternatives investigated

– Extruded panels 400mm – FS welded – Both alternatives can be used as wall panel as well as floor

  • panel. Final design decided in each individual project.
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Aluminum design Aluminum design

  • Basic panel alternatives investigated

– Both alternatives meet following criteria’s.

  • Shear load of 550 kN/m
  • Blast load of 30 kN/m2 as shown below
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Aluminum design Aluminum design

  • Basic panel alternatives investigated

Reference - Steel Solid panel Alt A Solid panel Alt B

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Aluminum design Aluminum design

  • Basic panel alternatives investigated

– Structural calculations and production feasibility study performed by SAPA shows following

  • Possible weight saving of 40-50% in the panel
  • Possible embedded feasibility to decrease fabrication time
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Emtunga Offshore AB Emtunga Offshore AB

  • Next step?

– Improve/verify/approve PFP design – Detail design – Temporary support structure for lifting and handling of each module

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End of presentation! Questions? Thanks for listening!