Sharp MD-S10E Specifications download pdf (Page 23)

STANDARD SPECIFICATION - BUILDINGS

DPI REFERENCE TEXT - APRIL 2009

PAGE 23

PLASTERING

10.4 CONSTRUCTION GENERALLY

Ceiling grid – Hold Point

Set out the ceiling grid so that panel joints and

centrelines of visible suspension members coincide

with grid lines if shown on the drawings. If not

otherwise shown, set out so that opposite margins

are equal.

Hold Point: Obtain approval of the setout before

commencing the installation.

Support members: Galvanized metal rods with a

length adjustment of 50mm.

Installation: Install the ceilings level and x so that

there is no looseness or rattling of components or

an y of the f aults de sc ribed in Appe nd ix B

of AS/NZS 2785.

Bracing

Provide bracing where necessary to prevent lateral

movement.

Fasteners

Use fasteners so that they are not visible in the

nished ceiling.

Bulkheads

Construct bulkheads and other similar ceiling

formations so that they are an integral part of

the ceiling structure and comply with the ceiling

performance requirements.

Panel installation

Painting: Paint ceiling tiles before erection.

Panel lock clips: Where panels are exposed to wind

loads or where required for security, insert panel

lock clips at the junction of carrier rails and panels.

10.5 ACCESSORIES AND TRIM

General

Provide accessories and trim necessary to complete

the installation.

Control Joints

Provide control joints in sheet nishes where

required.

Service penetrations

Provide openings for, and t the ceiling system up to,

services elements such as light ttings, ventilation

outlets, detectors, sprinklers and loudspeakers.

Access Panels

Provide ush tting access panels in non-

demountable ceilings supported and anchored by

methods which permit ready removal and rexing.

Number: One per 10 m

or where shown on the

drawings.

11. PLASTERING

11.1 GENERAL

Cross references

Refer to the following sections:

• Tiling, for waterproong of wet areas.

• Painting, for priming of embedded steel.

11.2 MATERIALS AND COMPONENTS

Plaster materials

Sand: Fine aggregate with a low clay content,

selected for grading and complying with SAA

HB161.

Cement: To AS 3972, type GP.

Lime: To AS 1672.1.

Sand: Fine, sharp, well graded with low clay content

and free from eforescent salts.

Gypsum plaster: To comply with the recommend

-ations SAA HB 161.

Metal lath: Expanded metal to AS 1397/Z275.

Lime putty mixes

Make a coarse mix of lime putty and sand 16 hours

before use and do not allow to dry out.

Gauged mixes

To improve workability, mixes required to contain

only cement and sand may be gauged by the

addition of lime up to 25% of the cement content,

but not as a substitute for the cement.

11.3 SUBSTRATE

Correction of substrate

Before plastering, make good defects in the

substrate. Hack off excessive projections. Fill

voids and hollows with a mix not stronger than the

substrate nor weaker than the rst coat.

Absorbent Surfaces: If suction is excessive control

by dampening but avoid over wetting.

Painted Surfaces: Remove paint and hack the

surface at close intervals.

Untrue substrate

If one coat application is required, but the substrate

is not sufciently true to comply with the thickness

limits for one coat, or has excessively uneven

suction resulting from variations in the composition

of the substrate, apply 2 coats.

Cleaning

Remove loose material and leave the surface clean

and dust free.

Embedded items

Sheath water pipes and other embedded items

to permit thermal movement. If ungalvanized steel

items are to be embedded in plaster, prime before

xing.

Chases

If chases or recesses are more than 50 mm wide,

cover with metal lath extending at least 75 mm

beyond each side of the recess.

Specifications March 2009.indd 23 11/03/2009 11:47:11 AM

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Sharp MD-S10E Specifications Page 23

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