HKIA Exam Paper 5 Quiz 53

Insulation shall be mechanically retained by aluminium or galvanized steel clips or straps, or integral pockets within the window frames (General for Building 2017 Edition – Section 16 – Curtain Walls – Thermal Insulation and Fire-Safing Insulation – 16.22).

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:
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. The 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).

The following types of anchors shall not be acceptable:
a. Wires.
b. Anchors whose only means of attachment to stone or building is a bed of grout, mortar, or adhesive.
c. Anchors secured in a hole with lead wool packing.
d. Anchors which transfer load from one piece of stone to another, rather than to the building structure (General for Building 2017 Edition – Section 16 – Curtain Walls – Anchors in Stone – 16.15).

The minimum width of primary seal shall be 3.0 mm. Secondary seal shall be a 2 part neutral cure structural sealant. Secondary seal shall completely cover spacer with no gaps or voids, and shall be continuously bonded to both plates of glass (General for Building 2017 Edition – Section 20 – Glazing – Insulating Glass – 20.01.03).

Carpet shall be manufactured by one of the following methods:
i. Single or face-to-face traditional loom.
ii. Needle insertion loom.
iii. Needle punch, fibre bonded, flocked, or knitted.
iv. Other weaving machinery producing the quality of carpet to meet the performance requirements detailed in this specification (General for Building 2017 Edition – Section 18 – Finishes – Classification – 18.143).

The flakiness index when determined to CS3 shall not exceed 40 for aggregate of 40 mm size or larger, or 35 for sizes of 10 to 28 mm (General for Building 2017 Edition – Section 6 – Structural Concrete Work – Aggregates – 6.33).

Finishes to aluminium alloy shall be as follows:
a. Mill.
b. Polished.
c. Polished and treated with a protective lacquer.
d. Clear anodised shall be to AAMA 611 and of the thickness grade and surface texture as follows:
i. Interior work Class 15 (minimum average thickness of 15µm).
ii. Exterior work Class 25 (minimum average thickness of 25µm).
iii. Internal concealed surface Class 10 (minimum average thickness of 10µm).
e. Colour anodised shall be to AAMA 611 average 25 µm thick.
f. Approved proprietary hardcoat anodic finish with better wearing qualities than standard anodising of the required thickness (General for Building 2017 Edition – Section 17 – Metalwork – Finishes to Aluminium – 17.22).

Nitrogen content: (“Kjeldahl” Method) (General for Building 2017 Edition – Section 25 – Landscape Work – Test for manufactured soil conditioner – 25.02).

Lightweight aggregate shall be clean clinker, or equal and approved, 20-50 mm in diameter, weighing a maximum of 500 kg/m3 when compacted (General for Building 2017 Edition – Section 25 – Landscape Work – Drainage aggregate – 25.11).

A pile group reduction factor of 0.85 shall be applied to the calculated allowable load capacity of piles unless:
i. The centre-to-centre spacings are of more than 3 times the perimeter of the piles or the circumscribed rectangles in the case of H-piles
ii. The allowable load capacity of the piles is derived from end-bearing
iii. The piles are rock-socketed piles
iv. The piles are driven to refusal to rest on rock with final penetration not more than 1.0mm per blow (General for Building 2017 Edition – Section 5 – Piling Work – Pile Group Reduction Factor – 5.07).

The term “sprayed concrete” refers to the concrete produced by the projection of a wetted aggregate/cement mixture onto an area by means of air pressure applied through a continuously feeding pressure vessel (General for Building 2017 Edition – Section 26 – Geotechnical Works on Soil and Rock Slopes – Glossary of Terms – 26.12).

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).

Reinforcement for joints in plasterboard shall be jute scrim cloth not less than 90 mm wide (General for Building 2017 Edition – Section 18 – Finishes – Joint Reinforcement – 18.33).

To be defined as Fully Tempered glass, the residual surface compression must be a minimum of 69 MPa, however, it is recommended that the glass supplied as fully tempered has a minimum of 75 MPa (General for Building 2017 Edition – Section 20 – Glazing – Fully Tempered Glass – 20.08).

For insulation, the conductivity shall not be more than 0.036 w/m deg. C at 24ºC (General for Building 2017 Edition – Section 18 – Finishes – Insulation of Under Cavity Floor where Required – 18.146).

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).

Limestone may be used to reduce the acidity of the soil. It shall be ground limestone, containing a minimum of 90% calcium and magnesium carbonates and capable of passing through a 10 mm mesh sieve (General for Building 2017 Edition – Section 25 – Landscape Work – Limestone – 25.19).

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)

Supply concrete in sufficient quantities to ensure that concreting of each pile proceeds without interruption. The concrete shall have a minimum cement content of 400 kg/m3 and a minimum slump of 150 mm (General for Building 2017 Edition – Section 5 – Piling Work – Large Diameter Bored Piles – 5.19).

Fabricated Soil Mix shall consist of friable, completely decomposed granite (or volcanic) and manufactured soil conditioner in the proportions of 3:1 by volume (General for Building 2017 Edition – Section 25 – Landscape Work – Fabricated Soil Mix – 25.02).

Non-slip strip insert shall be 25 x 15 mm slightly curved on top and consisting of:
i. A compound of cement and carborundum dust 1:1, or
ii. A proprietary insert strip.
(General for Building 2017 Edition – Section 18 – Finishes – Non-Slip Strip – 18.88)

Unless otherwise stated:
a. Bottom bolts shall be 150mm minimum long.
b. Top bolts to doors up to 2000mm high shall be 150mm long. For taller doors, increase bolt length by 150mm for each 150mm of additional height, or part thereof. For very tall doors, automatic flush bolts may be substituted (General for Building 2017 Edition – Section 14 – Ironmongery – Bolts – 14.88).

Unless specifically designed to clear an obstruction at the point of installation, the length of the bottom rail including end-caps shall be within ±3 mm of the overall width of the blind (General for Building 2017 Edition – Section 22 – Internal Fittings and Fixtures – Bottom rail – 22.45).

The minimum service life of all gaskets, weather stripping, and other glazing accessories shall be 15 years (General for Building 2017 Edition – Section 20 – Glazing – Glazing Materials – 20.01.04).

Cement-based plaster contains mineral filler material as aggregate and portland cement as main binder, with additives for improved compressive strength and reduced shrinkage
Gypsum based plaster contains pre-mixed minerals, gypsum base rendering materials, and additives which could be applied in one single thick application without cracking and separation from the substrate (General for Building 2017 Edition – Section 18 – Finishes – Cement Based Premixed Plaster – 18.58).

Structural sealant shall be either:
a. One part gun grade neutral moisture curing silicone elastomeric sealant or
b. Two part structural silicone elastomeric sealant. Products requiring mixing of components shall be acceptable only for shop application with mixing and application equipment acceptable to the sealant manufacturer (General for Building 2017 Edition – Section 16 – Curtain Walls – Sealants – 16.21).

Design bond strength between bedrock and grout shall not exceed 0.7 MPa for grout having minimum cube strength of 30 MPa at 28 days and 0.64 MPa for grout having minimum cube strength of 25 MPa at 28 days (General for Building 2017 Edition – Section 5 – Piling Work – Minipiles – 5.21).

Provide mechanical retention for the sprayed mineral coating by means of mesh reinforcement in accordance with BS 8202-1 unless:
a. There is evidence from fire resistance tests to show that there is adequate bond between the spray and the substrate (including primers or other coatings)
b. The spray is locked in position by virtue of the shape of the element (General for Building 2017 Edition – Section 15 – Structural Steel Work – Sprayed Mineral Coating – 15.69).

Roller shutters shall be either:
i. Self – closing.
ii. Manually operated by an endless chain.
iii. Electrically operated (General for Building 2017 Edition – Section 17 – Metalwork – Roller Shutters and Doors – 17.41).

Minimum width of primary seal shall be 3.0 mm. Secondary seal shall be a 2 part neutral cure structural sealant. Secondary seal shall completely cover spacer with no gaps or voids, and shall be continuously bonded to both plates of glass (General for Building 2017 Edition – Section 20 – Glazing – Insulating Glass – 20.01.03).