The Benefits of Mid-Rise Construction In Timber For The Construction Clients’ Group PRESENTED BY SEAN GARDINER
Photo by D-Max Photography Photo by D-Max Photography • Contents 1. What Is Possible 2. Benefits of Timber Construction 3. Timber vs Steel braced frame 4. Challenges 5. How 6. Code Compliance What’s next 7. 8. Conclusion/Questions? SLIDE 2 SLIDE 2
• Benefits of timber construction SLIDE 17 Cost t savings ngs (e.g. . light t timber er-framed amed const structi tion) n) • Reduc duced ed buildi ding ng weight ht • - Reduced foundations (particularly for poor geotech) - Reduced lateral structure (light and flexible) - Opportunities for extension of building height Sustai tainabl nable, , low-car carbo bon • Broade ader pool of builde ders s & E Easi sily y modifi fied ed on site • Potent ntia ial programme amme savings gs • Aestheti thetic- natural attraction of timber, “improved health and • wellbeing”
• SLIDE 18 Lendlease, Australia
• Timber compared to Steel Braced SLIDE 19 Atlas as Quarte ter
• Timber compared to Steel Braced SLIDE 20 NZ Timbe ber r Concept vs Steel Braced Frame Atlas as Quarte ter • Chri rist stchurch • 10% saving g on super-stru ructure • 30% ($300k) ) saving g in in piles s •
• Challenges SLIDE 21 Timber r Shri rinkage ge and differential movement New Zealan land Market • Noise se Contr trol ol • Floor or Vibration on • Fire Safety • Claddi dding g and Facades • Market percept ption on? •
• What Challenges SLIDE 22 UK and North America a for . decades NZ Wood d Design gn Guide des Mid-ri rise se const stru ructi tion on handbo dbook ok
• How? Light timber framing or CLT SLIDE 23 Concr cret ete e Podium um • Mid-rise se (4-6 6 storey ey) ) apartm tments ents Lightw htweight ght Timbe ber Tower er over • Conti tinu nuous us Plywood d Shear arwal alls • Simplified fied Struct ctural ural Desi sign gn • Wall Cons nstr truct uction • - Double Stud Party walls - Staggered Stud Corridor walls - Single Stud Internal and External LB walls LVL •
• How? SLIDE 24 Typical al Floor . Construc struction
• How? SLIDE 25 Shear ar Wall l Construc struction Seismi smic Perform ormance (nail • slip) p) T ake-Up Up Devices • Flexi xibl ble and Ductile • (reduced d seism smic loads) s)
• How? SLIDE 27 Services s Integra gration on • Corri rido dors • Balcon onies • Lift Shafts • Time Efficiencies • Pre-fabri brication on • Modulari risati sation on •
• Code Compliance? SLIDE 28 B1/VM1 M1 • NZS1170 70.5 (Loadi dings) gs) • NZS3603 (Timbe ber r structures s standa dard) d) • Covered d under r current verification on method od • Altern rnati tive soluti tion on and peer review w may be required for low- • damage systems, ms, such as rocking g shear walls s
• What Is Next ? SLIDE 29 . Cross ss-Laminate nated Timber r • (CLT) Portal Frames • • Glulam • Laminated Veneer Lumber (LVL) PRESS SSS-LAM • Rocki king ng Struct ructures • RSFJ-T ect cton onus us •
• Cross- Laminated Timber (CLT) SLIDE 30 Availabl ble from om: Xlam- Nelson, on, New Zealand d (also so availabl ble in Australi tralia) https ps:// ://www.x .xlam.c .co.nz o.nz/ Streamli mlined Buildi ding g Solution ons s (ex Austra ralia, imported d from m Europe pe) http:// p://ww www.str .streamlinedbui dbuildi ding. g.com om/
• CLT- Mahitahi example SLIDE 31 Approx. x. $11M M reside dential developme pment • Used “3 - layers” CLT (5 layers expensive • due to glue) CLT3/ T3/115 walls • CLT3 T3/135 floo oors • Ductility μ =1.25-2.0 .0 •
Photo by D-Max Photography • Conclusion/Questions? CONT NTACT US Sean Gardiner r Sector Leader – Structures Calibre 03 371 0558 | 021 243 2553 Sean.Gardiner@calibregroup.com SLIDE 35 SLIDE 35
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