‘Type of Construction’ – Determine the Construction Type of a Building

Type of Construction Determine the Construction Type of a Building

‘Type of Construction’ – Determine the Construction Type of a Building

As a multidisciplinary Architectural & Engineering team, we get asked a lot of questions about pharmaceutical facility design. One of the most frequently asked questions by clients during the design stage of a facility is about how to determine the construction type of the building. To answer this, it’s important to understand what is meant with the term ‘type of construction’.

What does “type of construction” mean?

Within the National Construction Code (NCC) Volume One (Section C – Fire Resistance) the ‘type of construction’, generally determines how much a building is expected to be resistant to a fire (including all building elements – structural members and non-loadbearing components).
In setting out the minimum fire-resisting construction requirements for all Class 2–9 buildings, the NCC classifies construction into three types; as Type A, Type B and Type C in descending order, according to fire resistance.

Types of construction
Figure 1: Types of construction

How do I identify the type of construction required?

The required minimum type of construction is determined by two factors:
1. Class of building : a measure of building’s likely use, fire load and occupants, indicates the risk level of the building, and
(For determination of building classification, refer blog: Building Classification)

2. Rise in storeys : relating to building height, determines likely time and difficulty for evacuation.
(For calculation of rise in storeys, refer blog: ‘Rise in Storeys’)

In principle, the higher risks of fire and greater building heights generally require the more resistant type of construction.

Once these are identified, the type of construction can be determined using the table below.

types of construction required - table 1
Table 1: Type of construction required

Example:
In a 2 storey Pharmaceutical manufacturing facility:

  • Class of building: 8
  • Rise in storeys : 2

Thus, the required type of construction in this case would be Type C.

Types of construction required example
Figure 2: Type of construction required (example)

What if the building comprises multiple classifications?

In this case, the type of construction applicable to the classification of the top storey applies to all storeys below it, which will ultimately result in the most fire-resisting type.

Example:
Consider a 3-storey building with:

  • the first storey of Class 7,
  • the second storey of Class 8, and
  • the top storey entirely of Class 5.

In this case, the classification of the top storey (Class 5) applies.

building section
Figure 3: Building section

Thus, the required type of construction by the use of Table 1 would be at least Type B construction.

Type of construction required
Figure 4: Type of construction required (example)

Can a building be of mixed types of construction?

Yes, it can be of different types of construction if the types are separated by fire walls accordingly i.e. into fire compartments.

However, in no case can different types of construction be above one another.

mixed types of construction
Figure 4: Mixed types of construction

Design in accordance with all of the relevant codes and standards can be somewhat complex, so please get in touch if we can be of help.