Earthquake proof construction
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Transcript of Earthquake proof construction
Established 1986
moladi isA MECHANISM for the RAPID delivery of QUALITY housing
EMPOWERING local communities
…a contemporary company that
harnessesand implements
contemporary solutions
Foundation-Raft Former
Foundation-Compact
Foundation-Compact
Foundation-Trench
Foundation-Trench
Foundation-Engineer Designed
Foundation-Professional-Indemnity
Foundation-Concrete
Foundation
Foundation-Power Float
moladi Formwork
moladi Formwork
moladi Formwork
Plumbing
Plumbing
moladi Formwork
moladi Formwork
Reinforcing
moladi Formwork
Reinforcing-Engineer Designed
moladi Formwork
moladi Truss Block Out
moladi-Mix Plant
River Sand-Cement-Water-moladiCHEM
moladi-Flow
moladi-Cast In-situ
moladi Formwork
Truss Block-Out
Truss Block-Out
Superstructure
Superstructure
Roof
Ceiling
Complete
Wall Properties
75 m²
80 m²
1987
110 m²
Bonded by Standard Bank since 1993
120 m²
Classrooms
Clinics
Ablution Block
Block vs moladi
Our block is BIGGER
Construction Cycle– Erratic supplies = erratic delivery– Dependant on skilled labour– Waste– Rework– Slow delivery– Inconsistent quality– Unpredictable cash flow– Increased cost
moladi Cycle– Constant supply = constant delivery– Known cost– Unskilled operators– Next to no waste– Increased productivity– Reduced cost– Consistent quality– Predictable cash flow
Key Benefits• NHBRC – Rational Design• Agrément Certified (CSIR)• SABS tested and approved• Engineer Certified *
– Foundation– Super Structure– Roof
• Superior wall strength• Quality Controls• Community acceptance NBR SABS - 0400
...QUALITY* Professional Indemnity
Key Benefits• Train and employ local unskilled labour• Utilize local materials• Re-useable• Reduced transport cost • Low construction cost• Rapid construction time• Practicable designs• Quality approved materials • Variety of finishing details• Low maintenance cost
...SAVINGS
Key Benefits• Speed without compromising quality• No need to plaster• No need to chase• No beam filling• Waterproof• Reinforced• Waste reduction• Logistics• Alterations and additions
...SAVINGS
Fundamental Criteria• Social acceptance• Durability• Quality• Variety• Increase in value• Re-sale ability• Minimise risk - Insurance/Professional Indemnity• Certified• Bondable/Financed
SABS Test
Waterproof• Test method is for the worst case
scenario i.e. Cape Town 1,000-mm rainfall per annum with a wind speed of 30 metre/second conducted over a 24-hour period.
SABS Test
Soft Body Impact• A 30 kg bag swings to impact the wall 900 mm
above the floor height to access the serviceability criteria
• 1800 mm above the floor height to access the safety criteria.
• Two impacts of the bag where executed on the exterior wall surface for each of the above criteria and the wall was inspected after each impact for any sign of cracks, damage or collapse – none.
SABS Test
Chisel Impact• After two impact of the chisel from a
height of 375 mm above the floor height a slight indentation was visible. The depth of the indentation was less than 3 mm.
SABS Test
• All test conducted by the South African Bureau of Standards, have been executed on a 100 mm (4 inch) wall as this is an acceptable norm for in situ walls and is also the standard applied to low cost housing units.
• Thermal conductivity of 100 mm moladi wall = 0,54 W/m.K
Thermal Conductivity/Resistance