PETROLEUM CENTRAL CONTROL BUILDING

1.             Laying Damp Proof Course

Any course on which a damp-proof material is to be laid shall be flushed up with cement mortar No. 2 to form an even bed Damp-Proof material shall then be laid and protected from injury until the mortar is set, when building may proceed.

Damp-proof materials shall be lapped 150 mm at joints and angles.

A damp-proof course shall be laid between the structural concrete floor slab and the walls forming the superstructure of any building.

2.            Masonry Construction

Bricks and concrete blocks shall not be wetted before lying. If not otherwise indicated, masonry units shall be laid in stretcher bond breaking joints with the course below. Walls shall be started on the structural beam, or slab and laid out with one starting course to define spaces, doors, openings, etc., and to serve as a guide for other trades. Joints shall be  finished flush where exposed to view, and shall be raked to an even depth of 10 mm, Masonry units shall be laid on a full unfurrowed bed of mortar and with end joints solidly filled with mortar. Units shall be tamped into place, squeezing out all air pockets and insuring a full bed of mortar.

Wall ties shall be of the following types and spacing:

·         Between cavity wall skins (where applicable), twisted galvanized steel butterfly type at 800 mm horizontally and 450 mm vertically.

·         At structural columns, galvanized steel dovetail ties with tang for embedment in block work joint for fixing to insert strip in column at 450 mm vertically.

Masonry shall have bed joint reinforcement in every third course consisting of 2 No. 6 mm mild steel bars or other approved proprietary system. In cavity walling, both skins shall have bed joint reinforcement. Reinforcement shall also be provided above and below all window and door openings.

The faces of walls shall be laid plumb and true with cells in vertical alignment. Chases, pockets, and other breaks in masonry construction shall be formed where shown or directed. Frames and other built-in items shall be maintained in proper position and bracing for the same shall not be removed until they have been securely anchored in the masonry. During progress of the work, the exposed surfaces of masonry, and of other construction and finishes shall be kept clean at all times and protected against damage.

Lintels and cills shall be laid true to line and level, bedded on cement mortar No. 2. An open joint, not less than 15mm wide, shall be left between the ends of all concrete lintels and cills, whether precast or cast in-situ, and the walls adjacent to these ends. These open joints shall be left as long as possible during construction and not filled until plastering or other works render such filling necessary. All such joints shall be properly filled before completion of the work.

Concrete screen blocks shall not be wetted before laying, and blocks shall be laid in stacking bond, unless otherwise shown on the Contract Drawings. Blocks shall be laid in alignment from bottom to top of wall with joints not exceeding 15mm., uniform throughout and finished slightly concave and smooth.

Cleaning of exposed masonry shall be performed by removing all excess mortar, dust, efflorescence and stains, using a five (5) percent muriatic acid and water solution or soap powder applied with brushes. The masonry shall be thoroughly rinsed with water for final cleaning. All damaged and defective work shall be cut-out and replaced with new     materials and joints shall be repainted where necessary to leave them in a satisfactory and approved condition. The same type and color of mortar shall be used for pointing as for the original work.

All masonry shall be protected from damage until completion and acceptance of the Works. The replacing of damaged work shall be the   responsibility of the CONTRACTOR and such repair work shall be performed prior to acceptance by COMPANY and at the CONTRACTORS expense.

3.            Fix and Build into Masonry

The Contractor shall ascertain from the suppliers of prefabricated or manufactured goods any special fixing instructions and shall refer them to COMPANY for approval.

Care must be taken to protect faces and other working parts from mortar and other droppings.

Under no circumstances shall uncoated aluminum be built into masonry.

Where aluminum or ferrous members are built into masonry the contact surfaces shall be first painted with two coats of bituminous paint.

Where aluminum surfaces are in contact the jointing compound shall be loaded with zinc chromate.

4.            Doors, Windows and Louvers

All buildings shall be weather tight before installation of equipment. In some cases, removable sections may have to be designed into buildings to allow later installation of major equipment.

Openings left in walls for fixing doors or windows or louvers shall be of minimum practical size required or directed by COMPANY.

All internal doors shall be mounted on metal sub-frames. The sub-frames shall be sized to allow building finishes to be completed prior to unit installation.

The CONTRACTOR shall obtain the approval of COMPANY for the method of fixing the door or window or louvers.

All doors shall be flush type, 44 mm thick, constructed of 1.2 mm (18-gauge) thick prime quality cold rolled steel, exterior doors shall be 1.5 mm (16-gauge) for conforming to ASTM A526, galvanized.

Doors shall be factory-prepared with internal reinforcing & cutouts for the specified hardware.

Double doors shall have a one piece overlapping metal astragal on both the outside of the active leaf & the inside of the inactive leaf.

Doors shall be filled with mineral wool.

All metal door frames shall be accurately fabricated.

All metal frames shall be fabricated from 1.2 mm (18-gauge) thick steel exterior frames shall be 1.5 mm (16-gauge).

5.            Rendering

Cement rendering shall be applied in two or three coats as specified on the Approved Drawing.

Undercoats shall have an average thickness of 10 mm and finishing coats an average thickness of 6 mm.

Two-coat rendering shall be to a total thickness of 16 mm and three coats rendering to a total thickness of 25 mm.

The CONTRACTOR shall take all measures necessary to provide an adequate key for rendering on concrete. Wire brushing of timber formwork will be permitted and when metal formwork is used hacking of the concrete will be allowed. The use of a retardant on formwork will not be permitted in any circumstances.

The surface of brickwork or masonry to be rendered shall be thoroughly prepared before the first undercoat is applied by raking out the joints to form an efficient key for the rendering.

Surfaces shall be thoroughly brushed down to clean off all dust and loose material. Particular attention shall be paid to the removal of mould oil or other deleterious substances. Each undercoat shall be scored to form an adequate key for subsequent coats.

Each rendering coat shall be kept moist for at least 48 hours and then given adequate time to dry out thoroughly before the application of any subsequent coats. The surfaces shall be moistened immediately before the application of any further coat.

The finishing coat shall have a steel float finish to true planes and regular curves and to an even and polished surface. Arises shall be rounded and lineable and a hollow fillet shall be run at internal angles.

Trowelled beds with a plain surface to receive flexible and thin coverings shall be brought to a smooth plane surface completely free of all marks grooves and the like.

The finished rendering shall be protected and cured as specified for concrete.

6.            Plastering

Premixed plaster shall be protected as for cement. Sand shall be stored under clean conditions and no contamination by soil or other harmful substances shall be allowed.

All plastering shall be carried out in two coats except on expanded metal lathing, which shall be carried out in three coats.

All materials shall be obtained from approved manufacturers and shall be used in accordance with their instructions.

Plastering to walls shall consist of a backing coat of cement lime sand 1. 1:6 to a thickness of 10 mm and a finishing coat of anhydrous gypsum plaster 3 mm thick.

Alternatively, a 2 mm thick coat of retarded hemihydrates premixed gypsum plaster may be used with a backing coat of browning plaster, 11 mm thick.

Plastering to concrete soffits, beams and the like shall be by proprietary skim coat.

Galvanized expanded metal angle and casing beads shall be fixed with plaster dabs at not more than 600 mm centre’s to suit the finished thickness of the plaster and where possible in one length. Where jointing is found to be necessary a dowel of heavy galvanized wire shall be         inserted in the hollow head of each piece to ensure perfect alignment.

Plastering on expanded metal lathing shall be in three coats and the pricking up and floating coats shall be in metal lathing plaster to a total thickness of 8 mm from the face of the lath and a finishing coat 2 mm thick of finishing piaster.

Dubbing out shall be carried out in a similar mix to the subsequent coat and shall be a maximum of 10 mm thick in any one application.

Metal lathing shall be galvanized steel lathing having a weight of 1.63 kg/sqm.

All surfaces shall be cleaned down and the surfaces of brickwork concrete or similar materials shall be well wetted before plastering is commenced.

The CONTRACTOR shall take all measures necessary to provide an adequate key for plastering on concrete, which shall include scrubbing the whole area. Wire brushing of timber formwork will be permitted and when metal formwork is used hacking of the concrete will be allowed. The use of a retardants on formwork will not be permitted in any circumstances.

Where dissimilar wall backgrounds meet to form an internal angle the plaster shall be severed at the intersection by a trowel cut and made good with an approved cellulose filler immediately prior to decoration. The junction between wall and ceiling plaster shall be treated in the same manner.

7.            Floor and Wall Tiling

Floors specified as concrete painted shall be screeded to finished floor level with steel float finish.

Ceramic tiles shall be bedded to the cement/sand Semi Dry Mix Method, using one part cement to four parts of sand spread evenly over the floor firmly compacted and covered by a sand cement slurry 3 mm thick. The tiles shall then be placed and firmly beaten into the bedding to finished floor level.

PVC tiles of a pattern and color to COMPANY's approval are to be supplied and fixed with approved adhesive to screed with steel float finish to provide the required finished floor levels.

Tiled areas shall be returned into window reveals to the height of the wall tiling. Window cills shall also be tiled unless otherwise indicated. The CONTRACTOR shall allow for all cuttings round edge tiles, internal and external, angles, coves and other specials necessary to complete the work.

8.            Roof Waterproofing and Insulation

Waterproofing to flat roofs shall consist of bitumen-based felts, asphalt or similar material. The design for flat roof waterproofing and insulation shall demonstrate that requirements are clearly set out regarding water tightness, drainage, thermal insulation, fire precautions, and access for maintenance and repair.

Waterproofing shall be of the 'inverted' type whereby loose-laid rigid insulation boards are placed over the waterproof membrane. Boards shall be protected by geotextile and ballasted with gravel and/or paving flags. This will ensure that membranes are protected both from deterioration arising from exposure to ultraviolet light, and from roof traffic.

All roofs shall be insulated with minimum 50mm thickness of extruded flame-retardant polystyrene boards or similar to the approval of COMPANY. White expanded polystyrene bead board is not acceptable. meets ASTM C-578, D-1621, C272, D696, C-203; also, meets to Underwriters Laboratories (UL) Fire Hazard Classification No. 723.

Waterproofing shall be fully protected at up-stands from direct sunlight by means of aluminum fashings.

Rainfall in Indonesia is often infrequent but violent. Designs shall allow for 75mm per hour precipitation. Parapet walls shall always have sufficient openings to ensure that roofs do not flood as a result of blockage to piped outlets.

Design proposals shall always include details of roof entries for piped services, demonstrating that adequate waterproofing is allowed for. Any openings required in roof slabs for access, skylights etc. shall have upstands a minimum of 150mm above the top of all roof finishes.

Membrane roofing shall be used EDPM (Ethylene Propylene Diene Monomer) Rubber (Neoprene), minimum 1.15 mm (0.045 inches) thick. Single membrane roofing system, which meets the minimum physical properties of ASTM D 5637 (Standard Specification for Vulcanized Rubber Sheet Used in Single-Ply Roof Membrane).

Vapor Barrier shall be provided under-slab moisture vapor barrier of 0.15 mm thick polyethylene film.

9.            Joinery and Carpentry

Joinery and carpentry work shall be carried out by qualified master tradesmen to a good finished quality.

10.          Plumbing and Sanitary Work

Samples of all plumbing and sanitary fittings shall be submitted to COMPANY for his approval before installation is commenced.

The whole of the plumbing installation shall be executed in accordance with the national or local water regulations.

Pipework shall be wrapped in protective wrapping tape and paste where it passes through walls or floors. Fixing shall be by means of standard brackets and clips of approved design and materials, and spaced at not more than 1200 mm centres.

The completed cold and hot water services shall be flushed out after completion and tested for water tightness. A test pressure of 20 m head of water shall be applied and maintained for one hour without any sign of leakage or pressure drop. Except where otherwise stated by COMPANY all plumbing pipework shall be surface mounted.

A sump arrangement with submersible sewage handling pumps shall be provided for all buildings with kitchen or toilet facilities in basements. The sumps shall have completely sealed covers to prevent escape of odours, but consideration shall be given to space and access for cleaning and removal of equipment for maintenance.

11.          Glazing

All glazing to air-conditioned spaces shall be double glazed by hermetically sealed units. Glazing shall be carried out with the recommendations of the glazing manufacturers.

Samples of all glass shall be submitted to COMPANY for his approval before glazing is commenced.

All glass shall be kept dry during transit and storage and shall be cut with clean straight edges.

Glazing to metal shall include for plastic spacers at bottom and sides of panes where necessary.

Glazing with beads shall include for taking off and re-fixing beads where necessary. Glazing with beads and putty mastic or other glazing compound shall include for bedding the beads in compound.