HKSAR Government Headquarters stone works
Public & Government | Government

HKSAR Government Headquarters — Stone Works

33,000 ㎡ · Tender compliant · Class A fire rating · A public landmark delivered

Project Overview

Project Overview

Government headquarters — 33,000 ㎡ of public-area stone facing the four toughest hurdles in government work: strict public tendering, Class A fire rating, seismic intensity 8 and zero incidents. HENGSHENG MARBLE S&T CO. LIMITED Stone delivered fully compliant in 22 months.

📍
Central, Hong Kong
Location
📐
33,000 ㎡
Stone Installed
📅
22 months
Delivery Period
💎
6
Stone Varieties
🏛️
Aedas Government
Design Firm
🏛️
Class A
Fire Certification
📏
±1.0 mm
Flatness Control
100%
Tender Compliance
Government headquarters exterior
Government Headquarters · 33,000 ㎡ Class A fire-rated public landmark

Design Concept · A Dignified Yet Welcoming Government Stone Language

The government headquarters embraces the idea of an "open government": the main entrance and civic lobby use book-matched Calacatta Gold feature walls for formal, ceremonial presence; the public service areas and council chamber take Carrara White as their keynote, conveying transparency and openness; the meeting rooms and press briefing hall use contrasting Nero Marquina for depth — three principal stones forming a stone language unique to government, balancing dignity with approachability.

HENGSHENG MARBLE S&T CO. LIMITED Stone supplied and installed the 33,000 ㎡ of public-area stone; every stone passed Class A fire rating, seismic intensity 8, stain resistance grade 5 and heavy-metal-free testing. Over 22 months the government tender procedures were followed to the letter — zero violations, zero complaints.

Applications

Civic LobbyCouncil ChamberPress Briefing HallCivil Service CafeteriaPublic Service AreaLibraryAuditoriumRoof GardenGift ShopEntrance Memorial Columns
Materials

Stone Selection

Three principal stones cover dignity, openness and depth across the headquarters, unified by fire, seismic and environmental certifications.

Calacatta Gold stoneMATERIAL 01
Calacatta Gold
🇮🇹 Italy · Carrara quarries
ApplicationCivic lobby · Entrance memorial columnsFinishBook-match + Class A fire coating · 20 mmStandard Sizes3200×1600 mm slabs
Gold-veined slabs certified Class A fire rated and Class A radioactive; the 8-metre double-height entrance wall was built from 32 slabs cut from the same vein, four-way book-matched so the golden veining flows across the joints in a stately ceremonial panorama. 9,800 ㎡ supplied in total.
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Carrara White stoneMATERIAL 02
Carrara White
🇮🇹 Italy · Carrara quarries
ApplicationCouncil chamber · Public service area · LibraryFinishHoned + Class A fire coating · 12 mmStandard Sizes2800×1500 mm slabs
Light, fine-veined slabs certified Class A fire rated and heavy-metal free; the honed finish softens light for long meetings and reading. 14,500 ㎡ supplied — the headquarters' highest-volume stone.
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Nero Marquina stoneMATERIAL 03
Nero Marquina
🇪🇸 Spain · Markina quarries
ApplicationMeeting rooms · Press briefing hall · Entrance floorFinishMirror polished + Class A fire coating · 20 mmStandard Sizes3000×1500 mm slabs
Black ground with white veining for strong contrast, certified Class A fire rated; under high-contrast lighting it lends meeting rooms real formality. Every slab was numbered by veining direction so installations match perfectly across rooms. 8,700 ㎡ supplied.
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Construction

Construction Process

Six stages from public tender to phased handover — 22 months of strict tender discipline, every material traceable.

01

3D Scanning

3D Scanning

360° laser scanning of the five civic floors produced millimetre-level point clouds, resolving 286 structural deviations in advance.

02

Public Tendering

Public Tendering

All five lots were publicly tendered and awarded to the lowest compliant bidder; every material came with certificates of origin and customs declarations.

03

Factory Fabrication

Factory Fabrication

Five-axis CNC machined every slab; Class A fire coatings were factory-applied to a tolerance of ±0.5 mm.

04

Standard Packing

Standard Packing

All stone packed to GB/T 18600 with shock-absorbing lining; GPS-monitored transport with zero breakage end to end.

05

On-site Installation

On-site Installation

Every worker fully certified — 100% of special trades licensed; every installation traceable to its crew and time.

06

Fire Acceptance

Fire Acceptance

The building's fire coatings passed Class A acceptance first time, with 100% sampling of every joint.

Installation Details

Installation Details

Craft details up close — government work is won in millimetre-level rigour.

Class A Fire Sealing

Class A Fire Sealing

Every stone joint sealed with Class A fire-rated sealant, fire resistance ≥2 hours once cured, tested to BS 476.

Fire-rated Layering

Fire-rated Layering

Stone backed with 30 mm fire-rated rockwool composite giving 4 hours' fire resistance; the whole wall passed Class A acceptance.

Seismic Anchoring

Seismic Anchoring

All stone uses underbolt seismic anchors designed to seismic intensity 8, withstanding rare major earthquake loads.

Stone Curtain Wall

Stone Curtain Wall

Dry-hung curtain wall joints at a standard 1.5 mm width, withstanding 1-in-50-year wind pressure with no risk of dislodgement.

Tamper-proof Seals

Tamper-proof Seals

Key-area stone carries tamper-proof markers; material origin, installing crew and inspection results are traceable end to end.

Lift Lobbies

Lift Lobbies

All eight lift-lobby column wraps in Nero Marquina book-match, with joint deviation ≤0.3 mm.

Technical

Technical Highlights & Solutions

The strictest tender, fire, seismic and environmental hurdles in government work — HENGSHENG MARBLE S&T CO. LIMITED Stone answers with data.

📋
CHALLENGE 01

Full tender compliance across 33,000 ㎡

Government tendering is unforgiving — origin certificates, radioactivity reports, customs declarations and social-security records are all mandatory; a single violation voids the entire lot.

Solution: All five lots publicly tendered; every material backed by Italian quarry certificates of origin, customs import declarations and Class A radioactivity testing; dual ISO certification at the factory and site office. 22 months, zero violations, zero complaints.
🔥
CHALLENGE 02

Class A fire rating, 4-hour fire resistance

Fire acceptance is the strictest test for public buildings: all stone must be certified Class A to BS 476 / GB 8624 with fire resistance ≥2 hours.

Solution: Fire coatings factory-applied across the building, with 30 mm fire-rated rockwool composite backing; the whole wall passed a 4-hour BS 476 Part 22 fire test at first acceptance.
📐
CHALLENGE 03

Seismic intensity-8 stone anchoring

Hong Kong's seismic design intensity is 7, with major public buildings designed to 8; curtain-wall stone must never dislodge in a major earthquake.

Solution: The entire building uses underbolt seismic anchoring designed to intensity 8; tested by the national seismological authority to withstand 0.4 g peak acceleration.
🌱
CHALLENGE 04

Heavy-metal-free, environmental commitment

Indoor environmental standards for public buildings are exacting — VOC and heavy-metal emissions must beat E1.

Solution: All stone supplied with EU CE certification, heavy-metal-free test reports and Greenguard Gold certification; after 48 hours of ventilation the indoor air reached E0 grade.
±1.0 mm
Measured flatness
Class A
Fire certification
Intensity 8
Seismic design
22 months
Delivery, zero violations
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