Section C

Question 1

What are the 4 D’s in detailing?

What is the 5th D?

Answer 1

Deflection - keep water away
Drainage - provide paths
Drying - ventilation
Durability - appropriate selection

Diffusions - movement of water vapour

Question 2

What are 6 key aspects of the Detailed Design phase?

Answer 2

1) appropriate materials & systems
2) drawing & communication
3) coordinated specification & schedules
4) quality, cost & time
5)design change communication
6) comply with the law / NZBC

Question 3

What are the 3 C’s and 4 C’s of Detailed Design?

Answer 3

Completeness
Clarity
Cross Referencing

Clear
Concise
Correct
Complete

Question 4

What are the key difference between specifications and drawings?

Answer 4

Drawings describe quantity, position, assembly and extent

Specification describes quality and process

Question 5

Explain the hierarchy of Legislation?

Answer 5

The Building Act 2004 forms Building Regulations, of which Schedule 1 contains the Building Code (from Building Regulations 1992)

Under the Building Code are Acceptable Solutions, Verification Methods & Alternative Solutions. AS & VM’s included standards cited.

Question 6

What are the three parts of each section of the building code?

Answer 6

Objectives
Functional Requirements
Performance Criteria

Refer Schedule 1 of the Building Act 2004

Question 7

How might you demonstrate compliance with the building code?

Answer 7

Acceptable solutions
Verification methods
Cited Standards
Determinations
Product Certification
Alternative Solutions

Question 8

What is the purpose of the building regulatory system?

Answer 8

Sets out a framework to promote good quality decisions being made during the building process.

Assures peoples safety and wellbeing within buildings in NZ.

Question 9

What are the 9 compliance pathway options for demonstrating compliance of an alternative solution?

Answer 9

1.Comparison with an acceptable solution or verification method

2.Comparison with other documents i.e BRANZ appraisals or MBIE determinations

3.Comparison with in-service history ie. product or method used successfully in similar applications

4.Expert opinion - for specific proposals or demonstrate performance of existing details

5.Comparison with a previously accepted Alternative Solution

6.Product certification i.e Codemark. Or MultiProof (for standardised designs) and BuiltReady (for modular components built off-site)

7. MBIE Determination - specific confirmation proposal meets Code requirements

8.Verification Methods - a test or calculation method for testing code compliance

9.Acceptable Solutions -

Question 10

Where do you find the Building Code?

Answer 10

Building Regulations 1992, Schedule 1.

Note only part of the Building Regulations 1992 that has not been revoked

Question 11

What is the purpose of the Building Code?

Answer 11

To set minimum performance standards buildings must meet.
How a building must perform = performance based code.

Question 12

What is RBW?

Answer 12

Restricted Building Work. Relates to residential construction, design and alterations, that requires a building consent, and affects a homes weather-tightness, primary structure or certain fire safety design.

Will apply to houses and small-medium apartment buildings.

Question 13

Who can sign a RBW memorandum?

Answer 13

A natural person being a Licensed Building Practitioner, Registered Architect or Chartered Professional Engineer

Question 14

What are the 4 types of Producer Statements?

Answer 14

PS1 - Design
PS2 - Design Peer Review

PS3 - Construction
PS4 - Construction Review

Question 15

The Building Amendment Act 2013 introduced two main new parameters, what are they?

Answer 15

1. Construction work over $30K requires a written construction contract

2.New 12 month defects repair notification/liability period for Contractors

Question 16

What are the sections of a Trade specification under MasterSpec?

Answer 16

1. General
2. Products
3. Execution
4. Selections

Question 17

What are warranties and guarantees?

Answer 17

Warranty - an undertaking from one party to another. Warrant the performance of the relevant part of the works and include to undertake remedy.

Guarantee - an undertaking by a third party to act in the event one party does not fulfil their obligations under the guarantee.

Question 18

What is a CoA?

Answer 18

Certificate of Acceptance.
Applied for if building work was constructed without a building consent on and from 1 July 1992.

A CoA may be issued for building works in the following circumstances:
* When urgent work is carried out to protect life or health, or prevent serious damage to property and it is not practical to obtain a building consent in advance.
* When a building consent authority (that is not a territorial authority) or an Organisation accredited to the BCA Regulations is unable or refuses to issue a code compliance certificate for work carried out under a building consent.

A CoA provides a limited assurance that the Council has inspected unconsented building works, or building works undertaken urgently, and is satisfied to the best of its knowledge that the building work complies with the New Zealand Building Regulations 1992 (Building Code).

Question 19

What is the role of the BCA vs TA under the Building Act?

Answer 19

BCA - charged with a duty to assess and issue building consents (but not waivers or modifications), assess building work for which it has granted a consent, issue CCC & compliance schedules. Example is Consentium - KO’s BCA but isn’t a TA.

TA - performs the function of a BCA if also in this role. Also issues PIMS, grants exemptions, issues CoAs, administer annual BWOF

Question 20

What must you consider in risk matrix calculations?

Answer 20

Wind zone
Number of stories
Eaves
Roof/wall intersection
Envelope complexity
Deck design

Question 21

If you are acting as the agent for a BC or RC, what must you do?

Answer 21

Gain written confirmation from the client of your status as agent

Question 22

What should you consider when selecting warranty periods?

Answer 22

If work is critical or risky, seek to increase.

If a large project and large quantities, increase

Costs money to produce and enforce.

If a short or minor warranty, especially in residential, remember CGA and implied warranties.
May not be worth seeking.
Consider BC durability period, although note installation often less.

Note 10 year long stop liability - do you want this to cover also?

Question 23

What are the 4 parts of the specification?

Answer 23

P&G

Trade sections:
- General
- Products
- Execution
- Selections

Question 24

Explain vapour diffusion?

Answer 24

Typical example - vapour diffusion happens when a material - i.e gypsum drywall installed on a wall - seperates two zone. If the air on on side of the drywall is very damp, and the air on the other side of the drywall is very dry, moisture in the air will diffuse through the drywall.

If the drywall is screwed to a stud wall that separates a damp area from a dry area, the drywall absorbs moisture on its damp side. Moisture evaporates from its dry side. The moisture has moved through the drywall by diffusion.

Question 25

Benefit of vapour diffusion?

Answer 25

Vapour diffusion typically thought of as a negative phenomenon - one that needs to be completely stopped.

In reality, a positive mechanism that can be used to a designers benefit, and is very important drying mechanism for an enclosure assembly.

In fact, vapour diffusion is the only process through which the interiors of most in-service wall assembiles can dry

Question 26

What is a Producer Statement?

Answer 26

A professional opinion based on sound judgment and specialist expertise, intended to provide BCAs with reasonable grounds for the issue of a Building Consent or a Code Compliance Certificate, without having to duplicate design or construction checking undertaken by others.

A statement that certain work will be, or has been, carried out in accordance with certain technical specifications.

Typically used for specialist work, such as engineering, or a proprietary product which is installed by appointed contractors.
It is not a product warranty or guarantee of compliance.