HKIA Exam Paper 6 Quiz 17

To be defined as Heat Strengthened glass, the residual surface compression must be between 24 and 52 MPa (General for Building 2017 Edition – Section 20 – Glazing – Heat Strengthened Glass – 20.07).

Grouts mixed with plain or coloured cement shall be:
i. For floor tiling generally: cement and sand 1:3, mixed to a paste with the minimum of water.
ii. For mosaic tiling or glazed wall tiling: cement and powdered limestone 1:3.
iii. For external facing tiles: cement and sand 1:3 (General for Building 2017 Edition – Section 18 – Finishes – Grout – 18.115).

Steel lathing shall be to BS EN 13658-1 & BS EN 13658-2 from an approved manufacturer:
i. Plain expanded type of 6 mm short way mesh coated with tight coat galvanizing and weighing not less than 1.6 kg/m2.
ii. Ribbed expanded type similarly coated and weighed not less than 2.25 kg/m2 (General for Building 2017 Edition – Section 18 – Finishes – Steel Lathing – 18.24).

In addition to conforming to BS 952-1, BS 952-2 and ASTM C1048, monolithic heat strengthened and tempered glass shall conform to the following flatness tolerances:
i. Bow and warp have the same meaning. They are both defined as deviation of a glass surface from a true plane, with the glass freestanding or installed in a frame and positioned in a vertical plane.
ii. Localized bow refers to any straight line segment with a length of 300 mm on a glass surface.
iii. Overall bow refers to any straight line segment on a glass surface which extends between opposite edges across the smaller glass dimension and is perpendicular to at least one edge. The length of the line segment is the gauge length.
iv. Localized bow shall not exceed 1.6 mm.
v. Overall bow shall not exceed: 1.0 mm per 300 mm for gauge length in the range zero to 1 m; 0.75 mm per 300 mm for gauge length in the range 1 m to 2.40m; one half of the values listed in ASTM C1048, Table 2 for gauge lengths exceeding 2.40m.
vi. Where heat treating results in essentially parallel ripples or waves, the maximum peak-to-valley deviation shall not exceed 0.127 mm.
Requirements for localized bow and overall bow shall also be satisfied. Direction of ripples shall be consistent throughout the building and approved by the SO.
vii. The specified bow and ripple tolerances are intended as manufacturing quality control limits (General for Building 2017 Edition – Section 20 – Glazing – Flatness – 20.01.04).

Dry density and cohesion/adhesion properties of sprayed material;
For mechanical rooms, plant rooms, areas subject to vibration, or specified areas:
Dry density of the sprayed material shall not be less than 640 kg/m3
The cohesion/adhesion of the sprayed material shall have a minimum 0.35 MPa onto primed steelwork under site tests in accordance with ASTM E736 (General for Building 2017 Edition – Section 15 – Structural Steel Work – Sprayed Mineral Coating – 15.69).

Finishes to steel shall be as follows:
a. Bare to receive painted finish.
b. Electroplated coating of zinc shall be to BS EN ISO 2081, Class A, 0.025 mm thick.
c. Zinc sprayed coating shall be to BS EN ISO 2063 – nominal thickness 0.2 mm unless otherwise specified.
d. Galvanizing shall be hot-dip galvanizing to BS EN ISO 1461 Components shall be galvanized after fabrication if required (General for Building 2017 Edition – Section 17 – Metalwork – Finishing to Steel – 17.21).

Mulch shall be composed of organic material such as leaf litter, tree bark, wood shavings, wood bark, decomposed sawdust, chopped tree fern, with a nominal size of 2 – 20 mm or other approved material. It shall have the following characteristics:
i. In friable and non-gluey texture;
ii. In stable and dry condition;
iii. free from impurities and not made with materials that are known to contain pathogens or other toxic materials injurious to plants, humans, or animals;
iv. Giving off neither toxic nor obnoxious fumes/odour;
v. Not subject to wind erosion;
vi. No weed growth, other foreign matter or contamination (General for Building 2017 Edition – Section 25 – Landscape Work – Mulch – 25.20).

In addition to conforming to BS 952-1, BS 952-2 and ASTM C1048, monolithic heat strengthened and tempered glass shall conform to the following flatness tolerances:
i. Bow and warp have the same meaning. They are both defined as deviation of a glass surface from a true plane, with the glass freestanding or installed in a frame and positioned in a vertical plane.
ii. Localized bow refers to any straight line segment with a length of 300 mm on a glass surface.
iii. Overall bow refers to any straight line segment on a glass surface which extends between opposite edges across the smaller glass dimension and is perpendicular to at least one edge. The length of the line segment is the gauge length.
iv. Localized bow shall not exceed 1.6 mm.
v. Overall bow shall not exceed: 1.0 mm per 300 mm for gauge length in the range zero to 1 m; 0.75 mm per 300 mm for gauge length in the range 1 m to 2.40m; one-half of the values listed in ASTM C1048, Table 2 for gauge lengths exceeding 2.40m.
vi. Where heat treating results in essentially parallel ripples or waves, the maximum peak-to-valley deviation shall not exceed 0.127 mm.
Requirements for localized bow and overall bow shall also be satisfied. Direction of ripples shall be consistent throughout the building and approved by the SO.
vii. The specified bow and ripple tolerances are intended as manufacturing quality control limits (General for Building 2017 Edition – Section 20 – Glazing – Flatness – 20.01.04).

Insulating roofing tiles shall be 40 mm thick and 300 mm square or 400 mm square with a density of 1,250 kg/m3. m ±10%. The upper surface shall be hard and suitable for pedestrian traffic. Five legged tiles shall not be permitted (General for Building 2017 Edition – Section 18 – Finishes – Insulating Roofing Tiles – 18.107).

Shims which transfer shear forces (tending to slide one shim against another) shall be steel plates, set in a staggered pattern and fillet welded to each other and to the adjacent steel surfaces. The shims and welds shall be structurally designed to support the applied loads (General for Building 2017 Edition – Section 16 – Curtain Walls – Shims – 16.19).

Tolerance of evenness of substrate shall be ±5 mm for internal concrete wall, block wall and beams, and ±3 mm for internal ceiling soffits (General for Building 2017 Edition – Section 18 – Finishes – Tolerance of Substrate – 18.64).

The maximum total chloride content expressed as a percentage relationship between the chloride ion and the cementitious content by mass in the grout shall be 0.1% (General for Building 2017 Edition – Section 5 – Piling Work – Minipiles – 5.21).

Nominal standard thicknesses of plywood shall be 3, 4, 5, 6, 9, 12, 15, 18, and 25 mm (General for Building 2017 Edition – Section 13 – Carpentry and Joinery – Plywood – 13.12).

Lightweight aggregate screeds shall consist of cement and lightweight aggregate 1:8 for roofs and 1:6 for floors unless contrary to the manufacturers’ recommendations.
Air entrained screeds shall have a dry density of not more than 1,200 kg/m3 (General for Building 2017 Edition – Section 18 – Finishes – Lightweight Screeds – 18.80).

The limits of temperature, humidity, and curing time must strictly adhere to coating manufacturer’s recommendations such that bubbles and blisters within coating shall not happen (General for Building 2017 Edition – Section 15 – Structural Steel Work – Intumescent Coating System – 15.70).

Insulate spandrel glass and other non-vision areas with thermal insulation having a 50 mm minimum thickness and a 0.127 mm thick reinforced aluminium foil vapour barrier (General for Building 2017 Edition – Section 16 – Curtain Walls – Thermal Insulation and Fire-Safing Insulation – 16.22).

Vapour barrier shall be 0.08 mm polythene sheet (General for Building 2017 Edition – Section 18 – Finishes – Vapour Barrier – 18.73).

The warp and weft, where applicable, shall be cotton, jute, or polypropylene (General for Building 2017 Edition – Section 18 – Finishes – Backing Materials – 18.146).

Minimum cover to reinforcement inside the pre-bored hole formed in bedrock shall be 35 mm. For other part of the pile, minimum cover to reinforcement shall be 40 mm or the diameter of reinforcement whichever is the greater
(General for Building 2017 Edition – Section 5 – Piling Work – Minipiles – 5.21).

There are two types of premixed plaster, cement-based, and gypsum-based. Gypsum based is for internal use only (General for Building 2017 Edition – Section 18 – Finishes – Type of Premixed Plaster – 18.58).

Adjustable metal louvre frames and weatherstrips shall be obtained from an approved supplier and constructed in accordance with the following:
a. Frames and clips shall be of 1.2 and 0.9 mm (minimum) steel sheet respectively. Clips shall be suitable for receiving 100, 150 or 230 mm wide and 6 mm thick glass blades, as required. Aluminium frames and aluminium or plastic clips may be supplied subject to approval.
b. Frames shall be designed for hand or pole operation, as required, with single control and to automatically lock when closed.
c. Weatherstrips shall be shaped metal strips of an approved design and thickness.
d. Steel frames, clips and weatherstrips shall be hot-dip galvanized or electro-zinc plated on all surfaces prior to assembly.
e. Where specified, provide 45 x 10 mm galvanized steel sub-frames for single side louvre frames, with necessary slotted adjustable lugs and screws for building in.
f. Provide matching rustless screws, bolts and spacers etc. for coupling adjacent frames to form mullions, where required (General for Building 2017 Edition – Section 17 – Metalwork – Adjustable and Fixed Steel Louvres and Frames – 17.37).

The surface of screeds shall be finished with one of the following surface finishes, level, to falls as specified:
i. Steel trowel or power float to give a smooth untextured surface.
ii. Wood float to give an even textured surface.
iii. Stiff brush to give a slightly roughened texture (General for Building 2017 Edition – Section 18 – Finishes – Surface Finishes Screeds – 18.81).

Steel corrugated sheets shall be hot-dipped galvanized corrugated sheets to BS 3083 and to be at least 0.6 mm thick, with corrugations 76 mm wide and 19 mm deep (General for Building 2017 Edition – Section 12 – Roofing – Corrugated sheets – 12.72).

Spatterdash shall consist of (1:2) cement: coarse sand with an approved bonding agent such as styrene-butadiene rubber (SBR) latex, an ethyl vinyl acetate (EVA) emulsion or an acrylic emulsion (General for Building 2017 Edition – Section 18 – Finishes – Spatterdash – 18.15).

Weep hole filters shall be 8 to 18 pores per centimeter reticulated PVC coated cell urethane foam, compressed by 30 to 50 percent (General for Building 2017 Edition – Section 16 – Curtain Walls – Weep Hole Filters – 16.20).

Screeds generally shall consist of cement and sand 1:3. Use the minimum water consistent with workability (General for Building 2017 Edition – Section 18 – Finishes – Mixes for Screeds – 18.75).

Unless agreed to the contrary, minimum design pressure loads shall be:
outward (negative) wind pressure 2.82kPa.
inward (positive) wind pressure 2.01kPa (General for Building 2017 Edition – Section 16 – Curtain Walls – Structural Requirements – 16.46).

Organic carbon content (using loss of ignition “Ashing” method of testing) (General for Building 2017 Edition – Section 25 – Landscape Work – Test for manufactured soil conditioner – 25.02).

Total thickness of plaster shall not exceed 15 mm (General for Building 2017 Edition – Section 18 – Finishes – Gypsum Plaster Generally – 18.49).

The composition of the pile yarn shall be fibres of one of the followings:
i. Wool or wool blended with up to 20% nylon.
ii. Nylon with antistatic properties for general use.
iii. Polypropylene
iv. Blend of fibres with antistatic properties for general use.
v. Blend of fibres formulated shall provide full antistatic properties to meet the requirements specified by International Business Machine (I.B.M.) or International Computer Company (I.C.L.) for computer floor coverings, or other equivalent approved by the SO (General for Building 2017 Edition – Section 18 – Finishes – Pile yarn – 18.145).