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Façade Access Design Guide

DESIGN FOR

MAINTAINABILITY

FACADE ACCESS

DESIGN GUIDE

Version 1.1

Façade Access Design Guide

Authority,Singapore.

www.bca.gov.sg

S/N Brief description of changesRevisiondate

1Ver1.0 First issueDec2017

2Ver1.1 First revision

a) Revisionmade to Fig. 4-37

May 2019

History of amendments

Façade Access Design Guide

1. INTRODUCTION

1.1 Principles of Design for Maintainability2

1.2 Purpose of this guide4

2. DESIGN PROCESS AND FACTORS

x

2.1 Design Brief and Workflow6

2.2 Design Factors9

3. TYPES OF FAÇADE ACCESS SYSTEM

3.1 Building Maintenance Unit 14

3.2 Monorail 16

3.3 Temporary Suspended Working Platform 17

3.4 Rope Access 20

3.5 Ground-based Access Equipment 21

3.6 Ladders and Gantries23

4. BUILDING DESIGN PROVISIONS

4.1 Roof Access26

4.2 Ground-based Access & Launching/landing Zones33

4.3 Façade Access 37

4.4 Access to Air Conditioning Unit Service Ledge 43

5. REFERENCES 46

6. ACKNOWLEDGEMENTS47

CONTENTS

Façade Access Design Guide

INTRODUCTION01

1.1 Principles of Design for Maintainability

1.2 Purpose of this guide

Façade Access Design Guide

1.1 importantconsideration. throughoutthelifetime.

Principles of Design for Maintainability

Fig. 1-1 The Star

Complexbuildingshapewith

high-volumeinternalspaces

Design for Maintainability

Purpose of guide

Note: activitiescanbecarriedout.

Fig. 1-2 DUO

Complexbuildingformand

façadefeatures

Fig. 1-3 The Interlace

Stacking blocks of structuresFig. 1-4 Reflections at Keppel Bay

Curvedfaçadeandsteppedroof

structure

Fig. 1-5 Sky Habitat

Steppedformandbridgingsky

gardens 2

Image by IwanBaan

Image by M+S

Image by Edward Hendricks

Façade Access Design Guide

Adequateaccessprovisionwillallow

façademaintenancetobecarriedout inasafe,efficientanduser-friendly manner.Bynotdoingso,thiswill affect:

Additionaltimeand/or

manpowerneededto undertakeinspectionand maintenancetasks

Omissionordelayed

maintenanceactivitiesthat canaffectbuilding performance

Unsightly,obtrusivefaçade

accesssolutions

Apoorlymaintainedfaçade

adverselyaffectsthe architectureaswellasthe appealtoprospectivetenants andthecommunity

SAFETY

Increasedriskforthose

carryingoutfaçade maintenanceworksand higherlong-termcosts incurredfromtheshortfallin adequatesafetyprovision

Lossofvalueandfunction

duetotheabove Note:

Otherthanroutinecleaning,

safeandefficientfaçade accessisalsoneededfor façadeinspectionandrepair activitiessuchascladdingand glazingreplacement.

Fig.1-6Façadeaccessdesignshoulduse

themostproductivemeansinsteadoflabour- intensivemethods

Fig.1-7Façadeaccessprovisionsshouldbe

integratedwiththebuildingdesignandnotan afterthought

BUILDING PERFORMANCE

AESTHETICS

FACADE

PRODUCTIVITY

VALUE

Design for Maintainability

Purpose of guide

3

Image by Diamond Glass Enterprise Pte Ltd

Façade Access Design Guide

façadeaccessdesignfromtheperspective. regulatoryrequirements. decisionprocess. 1.2

Purpose of this guide

Design for Maintainability

Purpose of guide

4

Façade Access Design Guide

DESIGN

PROCESS AND

FACTORS

02

2.1 Design Brief and Workflow

2.2 Design Factors

Façade Access Design Guide

facilitymanagersandend-users.

Design

Factors

Design Brief and Workflow

2.1

Design brief and workflow

6

Façade Access Design Guide

Planning &

concept designDetailed designTender & construction

Hand over &

occupation

Brief/ Documentation

Site and climatic

considerations

Detailed façade

design co-ordinated architectural, structural and building services proposals

Tender/contract

documentation

Façade design

concept

Maintainability

requirements, including safety considerations (e.g. provisions for tie-back restraints or lifelines)

Commitment of

contractors to specifications and maintainability requirements

Anticipated

maintenance requirements (e.g. compute cleaning cycle duration)

Devise maintenance

regime

Maintenance regime

in place

Access Strategy

Façade access

and maintenance strategy, including material hoist requirements for glass or façade lighting replacement

Finalise façade

access and maintenance options, with consideration for parking/storage location for maintenance equipment

Construction and

installation as per specialist details

As-built records,

including façade access and maintenance strategies information

Access System

Types of access

system and equipment available with considerationof maximum operating height

Detailed design and

specifications of access systems and equipment

Testing and

commissioning of access systems and equipment

Reliability and

availability of parts

Specialist

requirements

Preparation of

operation and maintenance (O&M)

Updated O&M

documents and

Design for Safety

register

Operations

Building lifespan/

lifecycle cost considerations

Anticipated business

costs and inconvenience to building users

As-built records,

including façade access and maintenance strategies information

Operational

procedures and training for maintenance personnel

Feedback to/from

developer and building managers

Review and validate

with developer and building managers

Review and validate

with developer and building managers

Feedback from

occupants/building managers for benefit of future projects

Pertinent statutory

requirements

Urban design

(building mass, façade treatments, lighting, signage, etc) and landscaping requirements

Buildability

Environmental

sustainability

Daylight reflectance

Design for Safety

Fire safety

Workplace Safety and

Health (WSH)

Safetycertification

by Professional

Engineer

Workplace Safety

and Health (WSH)

Design Brief and Workflow

Design

Factors

Design Brief and Workflow

7 Fig. 2-1 Façade access considerations at various stages of a development

Stages

Tasks

Façade Access Design Guide

Building

Height &

Geometry

Safety &

Regulatory

Requirements

Roof

Facade

Ground

Is direct access to roof

available for workers and equipment?

Are there clear passageways

for workers, including ladder crossings, to reach access system?

Is there sufficient working

space for setting up of the access system?

Are electrical and water

supplies available for operation of access system?

Is there a safety barrier that

prevents falls from height?

Is the floor designed to take

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