HKIA Exam Paper 4 Quiz 78

Fabricated Soil Mix shall consist of friable, completely decomposed granite (or volcanic) and manufactured soil conditioner in the proportions of 3:1 by volume. The mix shall be mixed evenly and shall be free from grass or weed growth, sticky clay, salt, chemical contamination, and any other deleterious materials and stones as Clause 25.02(a)(v), and possess the following characteristics as tested under BS 3882 and BS 1377-2
i. pH value between 5.5 and 7.0
ii. Organic matter more than 10% (m/m)
iii. Nitrogen content more than 0.2% (m/m)
iv. Extractable phosphorous (P) content more than 25mg/l of the mix
v. Extractable potassium (K) content more than 240 mg/l of the mix
vi. Extractable magnesium (Mg) content more than 50mg/l of the mix
vii. Soil texture content
Sand (0.06 – 2.0 mm): at the range of 40% – 75%
Silt (0.002 – 0.06 mm): at the range of < 40% Clay (less than 0.002 mm): at the range of < 20% viii. Maximum stone content % (m/m) as Clause 25.02(a)(v) ix. Exchangeable sodium percentage (ESP) %: <15 (General for Building 2017 Edition - Section 25 - Landscape Work - Fabricated Soil Mix - 25.02).

Inactive louvres shall be closed by aluminium sheet with minimum 3.0 mm nominal thickness (General for Building 2017 Edition – Section 16 – Curtain Walls – Louvres – 16.25).

Special filling material shall be suitable material capable of passing through a 75 mm BS sieve (General for Building 2017 Edition – Section 3 – Excavation and Earthwork – Definitions – 3.01).

Priming coat to consist of approved bitumen emulsion and water 5:1 by volume (General for Building 2017 Edition – Section 12 – Roofing – Prime Coat – 12.30).

Heat-treated glass may be rejected, and annealed glass will be rejected if it does not conform to the following criteria:
i. Shark teeth shall not penetrate more than half of glass thickness.
ii. Serration hackle may occur only within 150 mm of corners.
iii. Flare shall not exceed 1.0 mm as measured perpendicular to glass surface across the edge. Flare shall not occur at setting blocks.
iv. Bevel shall not exceed 1.6 mm.
v. Flake chips may occur only within 200 mm of corners; depth shall not exceed 0.8 mm and length or diameter shall not exceed 6.0 mm.
vi. Rough chips shall not be permitted. Rough chips shall be those which exceed any of the dimensional limits for flake chips.
vii. Shells on the face of the glass are not permitted on annealed glass and are only acceptable for heat-treated glass if they were present prior to heat treatment and are covered by a glazing bead or glass stop. They are not permitted for glass that will be structurally glazed with silicone (General for Building 2017 Edition – Section 20 – Glazing – Edge Quality – 20.01.02).

The pile shall be deemed to have failed the coring test if :
a. The concrete core exhibits honeycombing which means interconnected voids arising from, for example, inadequate compaction or lack of mortar
b. When any sample section of the core with length/diameter ratio of 1.2 is taken for compressive testing, the sample has an estimated in-situ cube strength converted in accordance with CS1 from the compressive strength of the grout core, less than 75% of the specified cube strength (General for Building 2017 Edition – Section 5 – Piling Work – Rock-Socketed Steel H-piles – 5.22).

Aggregate shall be:
i. Clean, rounded stone, 25 – 50 mm diameter, and
ii. Free from weeds, other building materials, foreign matter, and contamination (General for Building 2017 Edition – Section 25 – Landscape Work – Drainage aggregate – 25.11).

A pile group reduction factor of 0.85 may be applied to the evaluation of NSF under a pile group condition as defined in Clause 5.07 (General for Building 2017 Edition – Section 5 – Piling Work – Negative Skin Friction – 5.06).

Tiles shall be sound, well-burnt unglazed clay, whole, and free from cracks and blemishes. Approximate sizes shall be:
Plain tiles 225 mm x 225 mm
Roll tiles 165 mm long, and tapered
Valley tiles 300 mm x 225 mm (General for Building 2017 Edition – Section 12 – Roofing – Tiles – 12.36).

Coarse aggregates shall consist of 80% natural rock aggregates as defined in the GS and 20% recycled coarse aggregates (General for Building 2017 Edition – Section 6 – Structural Concrete Work – 20% Recycled Coarse Aggregates – 6.42.3).

Gravel shall be clean, broken granite stone, 10 – 30 mm in size (General for Building 2017 Edition – Section 25 – Landscape Work – Gravel – 25.11).

Strips of approved brickwork reinforcement 350 mm long of the following widths:
i. For 100-105 mm walls, 60 mm
ii. For 200-225 mm walls, 110 mm (General for Building 2017 Edition – Section 9 – Brickwork and Blockwork – Wall ties – 9.11).

The coefficient of uniformity (Cu) shall be calculated as Cu = D60/D10
where D60 and D10 are the equivalent sieve sizes in millimetres, interpolated from the particle size distribution curve, through which 60% and 10% of the filling material would pass respectively (General for Building 2017 Edition – Section 3 – Excavation and Earthwork – Definitions – 3.01).

Injection delivery pressure shall generally not exceed 1 MPa (General for Building 2017 Edition – Section 7 – Prestressed Concrete Work – Grouting Equipment – 7.41).

Glazing compounds are to be selected to suit the frame and glazing substrates. The following compounds are permitted to be used:
a. Silicone – gunnable neutral cure silicone one part weather type sealant if glass is retained mechanically. One or two-part structural sealant for glass not retained on all edges.
b. Polysulphide – is permitted only if the glass is positively retained on all edges.
c. Putty – is permitted for glazing into wooden frames only. Putty for glazing to softwood and absorbent hardwoods shall be linseed oil putty to BS 544. Putty for glazing to non-absorbent hardwoods shall be an approved proprietary brand recommended by the window manufacturer for the particular application and with setting properties and unpainted life to suit the construction programme (General for Building 2017 Edition – Section 20 – Glazing – Glazing Compounds – 20.16).

Ties for walls built against face of concrete to be formed from 20×3 mm stainless steel 316 flats 150mm long, fanged at both ends
(General for Building 2017 Edition – Section 10 – Masonry – Wall Ties – 10.06).

Weather-strips, glazing gaskets, and glazing blocks shall be extruded silicone, EPDM or neoprene (General for Building 2017 Edition – Section 16 – Curtain Walls – Operable Windows – 16.23).

Assume the entire cross-section has uniform temperature. For thermal design other than joint movement, the design winter surface temperature shall be 0ºC. The design summer surface temperature shall be at least 71ºC. The internal ambient temperature shall range from 15ºC to 25ºC (General for Building 2017 Edition – Section 16 – Curtain Walls – Criteria for Thermal movement – 16.45).

Protective fencing for completed planting works shall be proprietary-make bamboo fence comprising the following characteristics:
600 mm or 900 mm high (General for Building 2017 Edition – Section 25 – Landscape Work – Protective Fencing for Planting Works – 25.22).

If Hiley Formula is used to calculate the allowable load capacity of steel ”H” pile, the temporary compression of the hammer cushion ( Cc) shall be taken as not less than 5 mm when plastic cushion of 200 mm thickness or less is used (General for Building 2017 Edition – Section 5 – Piling Work – Steel ‘H’ piles – 5.18).

The product shall not contain any heavy metals or their compounds as listed below:
Arsenic
Cadmium
Copper
Lead
Mercury (General for Building 2017 Edition – Section 13 – Carpentry and Joinery – Wood Preservative to External Timber – 13.30.1).

Whips shall have all the following characteristics:
i. Aged between 2 – 3 years old;
ii. A single central stem and elementary branch system;
iii. A well developed vigorous root system;
iv. Total height above soil level exceeding 900 mm but not exceeding 2000 mm;
v. Grown and supplied in a container not less than 125 mm in diameter and 200 mm deep, and
vi. Free from any kind of pest, fungi, disease, and parasitic plants (General for Building 2017 Edition – Section 25 – Landscape Work – Whips – 25.32).

The structural requirements of the floor system shall be in accordance with the followings
Uniformly distributed load – 12.0 kN/m2.
Concentrated load – 4 kN over 25 mm2.
Deflection shall not be more than 1/250 of the shortest span or 2.5 mm whichever is less, up or down from the unloaded plane when subjected to the loadings quoted above, for a period of 24 hours.
Horizontal load- 1.2KN/m2 (General for Building 2017 Edition – Section 18 – Finishes – Structural requirements – 18.167).

Cement/lime mortar cement, lime putty, and sand 1:1:6 for external walls and 1:2:9 for internal walls (General for Building 2017 Edition – Section 9 – Brickwork and Blockwork – Proportion – 9.22).

The diameter of the hole shall be at least:
i. 20mm larger than the diameter of the rock dowel bar, or
ii. 20mm larger than the outer diameter of the connectors, if used, or
iii. 50mm, whichever is the largest (General for Building 2017 Edition – Section 26 – Geotechnical Works on Soil and Rock Slopes – Drilling and Preparation of Rock Dowel Holes – 26.31).

Thermal component of joint movement shall be based upon a minimum material temperature increase of 55ºC and decrease of 55ºC relative to nominal condition (General for Building 2017 Edition – Section 16 – Curtain Walls – Criteria for Thermal Movement – 16.45).

The strength properties of the sheeting material shall not be less than 110 kN/m2 in lap shear and 3.3 kN/m in lap peel under site conditions, unless otherwise approved by the SO (General for Building 2017 Edition – Section 6 – Structural Concrete Work – Watertight Construction – 6.64).

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).

Thickness of floor screeds shall be as follows:
i. Laid monolithically with the base: 15 mm (minimum) thick.
ii. Bonded to a hardened concrete base: 20 mm (minimum) thick.
iii. Not bonded to the base: 50 mm (minimum) thick including tile finish.
iv. Floating: 65 mm (minimum) thick including tile finish (General for Building 2017 Edition – Section 18 – Finishes – Thickness of Floor Screeds – 18.77).

Where the water level is higher than the bedrock level, the concrete used shall have grade strength 25% higher than the design grade strength (General for Building 2017 Edition – Section 5 – Piling Work – Large Diameter Bored Piles – 5.19).