11 1sa11a-ironmongery & others

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SA11-IRONMONGERY & OTHER WORKS

Section 11 IRONMONGERY & OTHER WORKS

11.1 STANDARDS OF CONSTRUCTION

Refer to Clause 1.1.1 of section 1- preliminaries, which applies to this section. All materials and

workmanship shall comply with design requirements

11.2 NON-CONFORMANCE WITH STANDARDS

Refer to clause 1.1.2 of section 1- preliminaries, which applies to this section.

11.3 REQUIREMENTS FOR ACCEPTANCE

11.3.1 Whenever a material, item, article or product is specified by trade name, manufacturers name or

catalogue reference, the Contractor may use its equivalent in the Works.

All materials, their dimensions, forms, weights, tolerances, etc shall be the best of their

respective kinds complying with the latest relevant Standards.

All work shall be carried out in accordance with the requirements in the drawings, the relevant

Standards and with the Engineers instructions.

The Contractor is advised to examine the drawings and satisfy himself as to their dimensional

accuracies. The Contractor shall notify the Engineer of any error or omission which will be

adjusted and corrected accordingly. The Contractor shall before tendering satisfy himself as to the

accuracy of the dimensions, sizes and positions of connections, joints, etc as no additional charge

by the Contractor will be entertained for any extra work required as a result of these errors

and/or omissions in the drawings.

11.3.2 Approval of Shop drawings and Samples

The Contractor shall submit a complete set of shop drawings for the works and fit for its purpose.

The shop drawings must clearly show in plan, elevation, sections and all details for Engineers

approval.

Samples shall consist of complete units of each type of assembly to Engineers approval. Samples

approved by Engineer shall be kept at the Site & used as the standard of inspection for the

remaining installation. Full-scale fabrication should not commence until Engineer and Employer

have approved full-scale samples.

11.3.3 Inspection of the work

The Contractor shall demonstrate that he has checked the installed work before notifying

Engineer to inspect. The method of checking shall be to Engineers satisfaction.

Comply with Engineers inspections to meet requirements for acceptance at the following stages;

a.

Approval of items at delivery inspections

b.

Approval workmanship at in-process inspections

11.3.4 Sample room

Amongst other samples, a representative section of each of the items shall be installed as

prototype of materials and method of application for approval of the Engineer before the actual

works can proceed on site. This shall involve showing all details ias will be required for the works.

The Engineer will nominate one room at the project that shall be used to establish the samples.

The Contractor shall notify Engineer to attend the work done in the sample room, and a joint

inspection of the work will be made. Engineers acceptance of the samples at the sample room

will be the standard on which subsequent installation is based.

11.3.5 Hand-over documents

Refer to clause 1.1.3 of section 1- preliminaries, which applies to this section. Submit documents

required by The Relevant Authorities in Vietnamese language, and documents required by

Engineer in English language.

11.4 MATERIALS

11.4.1 MILD STEEL HANDRAIL AND RAILING


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Provide and install mild steel handrail and railing as shown in the Drawings. The mild steel hollow

section handrail, balusters, hollow section support and bottom rail shall be to the dimensions and

sizes as shown. The mild steel hollow section supports shall be securely fixed into the structure as

detailed. All welded joints shall be fully welded and all welding shall be properly sanded down to a

smooth finish. Paint finish to Engineers approval.

11.4.2 MILD STEEL BALUSTERS, BARS, GRILLES, ETC

Mild steel balusters, bars, grilles, cat ladders, straps, etc. shall be properly framed, in accordance

with detail drawings, and shall be painted with one coat of red lead primer complying with

SS6:1970 before delivery to site. Paint finish to Engineers approval.

11.4.3 FISHTAILED HOLDFASTS

The timber door frame or window frames not abutting reinforced concrete work shall be secured

to walls with 6 nos or 4 nos 200 x 25 x 3mm mild steel fishtailed holdfasts which shall be primed,

one end bent up and screwed to frame and the other end built into bed joint of masonry walls.

11.4.4 FAN HOOKS

Cast fan hooks into positions as shown hot bent out of 16 mm diameter mild steel bars to ceiling

of the premises where required.

11.4.5 ROLLER SHUTTER

Upon completion of all works, the Contractor is required to obtain and furnish a One(1) Year full

Manufacturers Warranty for all doors and drive units supplied. Unless otherwise stated, roller

shutter shall be as follows:-

Heavy Duty Roller Shutter For Openings Exceeding

6 x 5m height up to 12 x 7m Height

Roller shutter where specified shall be electrically operated shutter in powder-coated finish.

The drum assembly shall be an extremely rigid lateral torque-tube consisting of a 200mm

diameter mild steel tube sheathed over a complete length of 38mm diameter mild steel solid axle

supported by suitably-spaced cast iron drumwheels. The counterbalance springs, manufactured

from 8 to 10mm diameter steel wires of various lengths and coils diameter, shall have one end

secured to the axle and the other secured to the drumwheel so that spring torsion is applied as

tube rotates over the width, height and weight of each door to achieve the torque required for

optimal counterbalance.

The door curtains shall consist of 100 x 1.2mm thick galvanised steel slats with perforation

complete with proprietary nylon end-clips secured to alternate slats to prevent lateral

movements. Curtain penetration into the guide channels shall not be less than 90mm on each

side. The bottom rail shall be a single-length inverted `T` extruded aluminium section of 5mm

thickness, with the base of the rail containing a channel cavity to retain a seamless profiled EPDM

weatherseal.

The guide channels shall be heavy-duty extruded aluminium profiles of overall dimensions of 120

x 100 x 5mm thick, incorporating full-height seamless rubber strips at the lips for smoother and

quieter operation. It shall be curved at the top for curtain entry and shall have removable back

covers for easy inspection and maintenance. The guide channels shall also incorporate a mini

current-collector strip to supply to the safety-edge mechanism, thereby eliminating the need for a

trailing exposed spiral cable.


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The drive unit shall consist of a suitably sized 3-phase continuous-rated electric motor driving a

totally enclosed reduction gearbox with a reduction ratio of 45 to 1. It shall have a chain-operated

manual sheave wheel that automatically engages whenever the hand-chain is pulled and

disengages whenever the shutter is being electrically operated so that the hand-chain does not

travel with the motor. This features also eliminates the need to physically switch over to manual

mode in the event of power failure. The one horse power motor also incorporates an adjustabletorque limiter that prevents the door from overdriving should the limit switch fail or becomes

mispositioned. The control box shall have a reversing contactor with a built-in thermal overload

feature. It shall have `Up`, `Down` and `Stop` push-buttons with a choice of `hands-on` or

`hands-off` operation. The door operation shall automatically stop at the desired upper and lower

via adjustable limit switches.

The door shall have a bottom safety-edge designed to immediately stop a closing sequence upon

contact with an obstruction. This shall consist of low-voltage resistance-activated contact strip

incorporated into the bottom rail weatherseal. It must be capable of being activated with `finger-

pressure` sensitivity.

Sectional Overhead Door For Openings Exceeding

6 x 5m Height up to 12 x 7m Height

Sectional overhead insulated door system comprising process laminated 42mm thick, 500mm

high sections made from 41mm thick CFC free polyurethane foam sandwiched by two 0.5mm

thick cover plates of stucco embossed aluminium sheet providing a U-value of 0.4 W/m2C. The

sections shall be free from `Cold Bridges`. The outside surface shall be in standard white colour

and the inside surface in aluminium finish.

The air tightness for an installed overhead door shall not exceed 2.5 m/m/h at 50 Pa pressure

and it is to be sealed with bottom, side, intermediate and top seals made of EPDM rubber.

The hardware such as rollers, roller brackets, tracks etc shall be of galvanised steel. The doors

are each to be individually balanced with torsion springs made to suit the individual door weight,

locking shall be of spring loaded bolt.

The door shall be electrically operated by means of a 3-phase 415V motor and control system

with thermal overload protection, push button controls and manual overide features. Safety

features shall be incorporated into the electric system. Door shall stop and reverse if any obstacle

is encountered on its way down.

Roller Shutter For Openings Up to 6 x 5m Height

Roller shutter where specified shall be electrically operated in Colorbond Zincalume or equivalent

steel curtain material permanently lock-seamed to form a continuous curtain with edges treated

with heavy-duty self-lubricating seamless braided nylon glide to prevent metal-to-metal contact.

The drum assembly shall consist of suitably graded oil-tempered torsion springs secured to

drumwheels moulded from engineering plastics. The curtain top shall be fully secured and

wrapped around the drum assembly to form a cylindrical torque-tube. The bottom-rail shall be

extruded aluminium section lock-seamed onto the bottom of the door curtain with base of the rail

containing two slots to retain a seamless finned PVC weatherseal.

The drive unit shall be driven by a twin 24V DC motor with syncronised gear reduction. The whole

unit shall be compact enough to fit neatly inside the door roll and drives the door directly.

Conversion to manual mode shall be conveniently effected at ground level by means of a lever


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actuator. A nylon chainwheel shall be incorporated for manual chain operation. The chainwheel

shall be designed to stop turning when door is electrically operated.

The control box shall be compact in size with electronic PCB and built-in transformer. It should be

linked to the drive unit via a pre-wired link cord with snap-on connector. An automatic over-load

device shall be provided to ensure durability of motors.

A built-in electronic safety device sensitive to any point of the bottom-rail shall be installed. When

a closing door is obstructed, it will automatically stop and immediately reverse.

The average speed of travel shall be 170 mm/sec.

Standard operation shall be by `Up`, `Down` and `Stop` push-button controls provided on thecontrol box, with a choice of hands-on or hands-off operation.

11.4.6 STEEL DOOR

Steel Door shall be supplied and installed by the Contractors specialist sub-contractor in the

trade. Contractor shall submit shop drawings showing the fulkl details of the steel door inaccordance with the drawings and fit for its purpose all to the approval of the Engineer before

commencement of fabrication and installation works.

11.4.7 MIRROR

Mirrors shall be 6mm thick manufactured using high grade float glass as its base with the silver

coating protected by a copper plated layer and finally sealed with an oven-baked paint coating.

Mirror edges shall be squared or bevelled and highly polished. Unless otherwise indicated, mirrors

shall be framed with stainless steel angle framing with 3mm thick marine grade plywood backing.

The plywood shall be screwed to wall with flat head screws.

11.4.8 GLASS BLOCKS

Unless otherwise specified, glass blocks shall be 190 x 190 x 80mm thick. Installation shall be in

accordance to manufacturers instructions.

11.4.9 IRONMONGERY

a. SCOPE OF WORKS

Provide and fix all ironmongery required to complete the whole works in accordance with the

requirements. All ironmongery shall be Yale brand or equivalent The minimum items of

ironmongery required to complete the Works shall be deemed included in the contract. The

Contractor shall ensure that the works, goods or materials used shall be suitable and

reasonably fit for the purposes for which they are required. In the event the works, goods or

materials to be used as specified in this Section are upgraded in order to meet the purposesfor which they are required, the Contractor shall do all necessary upgrading at no extra cost

to the Owner, subject always to the approval of the Engineer.

b. APPROVAL

The Contractor shall furnish to the Engineer for approval one set of each major item of

hardware specified and two sets of relevant brochures/catalogues in which the specified

ironmongery items are clearly marked out for easy reference. One approved set of

ironmongery shall be fully labelled and kept at the Site for reference and comparison with

subsequent deliveries. Ironmongery installed shall be of good quality and shall not be of

lower standard than the approved samples. Hardware not complying with approved sample

will be rejected and shall be replaced at the Contractor own cost and expense.

c. SUPPLY


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All hardware items shall be supplied complete with screws, bolts, nuts, brackets, etc

necessary for the proper installation of the hardware. Double door locksets shall include

rebated parts. Door locksets shall be lever handle type. All hardware shall generally be in

satin finish stainless steel unless otherwise specified. All door hinges shall be fixed with

matching screws. Unless otherwise specified, the grade of stainless steel shall be Grade 304.

d. INSTALLATION

All ironmongery shall be fixed with stainless steel screws properly driven with screw drivers

in the best workmanship manner. Hammering into position is prohibited. If screws are found

to be hammered in, the whole fixture shall be taken down, the holes plugged in with wood or

plastic plugs and the fixture refixed in a proper manner at the Contractors own cost and

expense. The Contractor shall secure a hardware technician from the supplier to assist or

instruct in the correct installation of the hardware. Special tools or template where specified

by the manufacturers shall be used to prepare doors to receive doors to receive hardware

items.

e. DOOR STOP TO TILED WALL SURFACES

Provide and fix in an effective position a 25mm diameter by 20mm thick rubber stopper to all

tiled wall surfaces against which the door opens, to prevent the door from damaging the wall

tiles. Fixing shall be with 25mm screws and rawl plug.

f. CONSTRUCTION MASTER KEY

All locks on the project shall be installed with temporary cylinders keyed for a construction

master key until the date of Substantial Completion or such earlier date as instructed by the

Engineer

g. HANDOVER OF KEYS

Unless otherwise specified, the Contractor shall provide 3 nos. of keys per lock. Every key

shall be provided with a durable key tag properly labelled and delivered to the Engineer insealed containers. Master keys shall be delivered to the Engineer in the original factory

sealed packing with a return receipt. A plan showing the locks location shall be handed over

to the Owner.

11.5 FINAL INSPECTION AND HAND-OVER

When the metal roofing system works installation is completed and has been agreed to be handed

over, the Contractor shall, at the time of the joint inspection, submit to Engineer the following

documents, certificates, and records of the Works completed;

a.

Copy of approved shop drawings and samples of full-scale assemblies

b.

Copy of in-progress inspection records

c.

Copy of non-conformances and approved corrective action

d.

Copy of ten year guarantee for mirrors

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