★ Flagship · Fire Protection

Premium CBD High-Rise Fire Protection

Large-scale fire sprinkler and hydrant estimation for a premium Brisbane CBD commercial tower, featuring 500+ sprinkler heads, multi-zone hydrant coverage and butterfly valve controlled riser systems across two major floor levels.

📍 Brisbane CBD, Queensland 🏢 Premium Commercial High-Rise 📐 Fire Sprinkler · Fire Hydrant · Life Safety

501

Sprinkler Heads

907 m

Sprinkler Pipe (25 mm)

Fire Hydrants

248

Flush Sprinkler Heads

109 m

Riser Pipe Network

Project Overview

Calibarium MEP was engaged to deliver a comprehensive fire protection estimation for a prestigious commercial high-rise tower in Brisbane's CBD. This flagship project required deep expertise in high-rise fire engineering, spanning multi-zone sprinkler systems, hydrant infrastructure with butterfly valve isolation, and precise riser calculations through multiple floor levels.

The scope focused on fire services across two major floor levels, with over 500 sprinkler heads, 907 linear metres of 25 mm sprinkler pipe, and a full hydrant network using pipe diameters from 40 mm through to 150 mm. The complexity of the high-rise environment demanded meticulous level-by-level quantification and riser coordination.

High-rise complexity: CBD high-rise fire protection demands absolute precision. Every sprinkler head must meet maximum spacing and distance-from-wall requirements per AS 2118.1, while hydrant coverage must satisfy AS 2419.1 for buildings exceeding 25 metres in effective height.

Fire Sprinkler System

The sprinkler system was designed with multiple head types to suit different ceiling configurations and fire risk profiles:

Sprinkler Head Type	Specification	Qty
Brass Pendant, 79°C	10 mm orifice, standard response	240
Flush Ceiling, 68°C	15 mm orifice, aesthetic integration	248
Brass Conventional, 68°C	15 mm orifice, plant / service areas	10
Brass Horizontal Sidewall, 141°C	15 mm orifice, high-temp zones	3

Sprinkler Pipe Network

Diameter	Level 21	Level 22	Riser	Total
25 mm	194 lm	369 lm	97 lm	660 lm
32 mm	28 lm	56 lm	7 lm	91 lm
40 mm	55 lm	32 lm	5 lm	92 lm
50 mm	4 lm	n/a	n/a	4 lm

Fire Hydrant System

Component	Specification	Qty
Fire Hydrants	Internal landing valves	6
FH Pipe, 80 mm	Main floor distribution	46 lm
FH Pipe, 100 mm	Riser / main trunk	4 lm
FH Pipe, 65 mm	Branch connections	6 lm
FH Pipe, 150 mm	Riser main	4 lm
Butterfly Valves	Zone isolation	2
Fire Services Connection	Street main connection	1

Technical Excellence

Multi-temperature sprinkler design: four distinct head types operating from 68°C to 141°C, reflecting varying fire risk across office areas, service zones and high-temperature plant rooms.
Flush ceiling integration: 248 flush-mounted 68°C heads for aesthetically sensitive areas, maintaining the premium architectural finish while ensuring full AS 2118 coverage.
Butterfly valve zone control: per-level isolation enabling floor-by-floor maintenance shutdowns without affecting building-wide fire protection, critical for occupied high-rise operations.
Riser optimisation: 109 linear metres of riser piping (25 mm to 40 mm) precisely calculated for adequate pressure and flow at the upper floors.
Dual-level estimation: both levels individually quantified to support independent procurement and installation phasing.

Outcome & Impact

This project stands as one of Calibarium MEP's flagship fire protection estimations. The sheer scale, over 500 sprinkler heads and nearly a kilometre of sprinkler piping across just two levels, underscores the complexity of CBD high-rise fire engineering. Our detailed level-by-level quantification, combined with precise riser calculations and multi-temperature head selection, delivered an estimation package that enabled confident procurement, competitive tendering and compliant fire safety outcomes.

Disciplines in Scope

Mechanical Electrical Plumbing Fire Protection

Fire Sprinkler Estimation Fire Hydrant Systems High-Rise Fire Engineering AS 2118 AS 2419 Butterfly Valve Design Riser Calculations Quantity Takeoff