SOUTH AFRICAN BUREAU OF STANDARDS
STANDARDIZED SPECIFICATION
for
CIVIL ENGINEERING CONSTRUCTION
HB : CLADDING AND SHEETING
SCOPE
This specification covers the roofing and cladding of structures using profiled roof-sheeting and side
cladding manufactured from steel, aluminium, fibre cement and glass-reinforced polyester.
NOTE: The standards referred to in the specification are listed in Appendix A.
INTERPRETATIONS
SUPPORTING SPECIFICATIONS. Where this specification is required for a project, the following
specifications shall, inter alia, form part of the contract document (NOTE: Items (b) and (c) below may
or may not be bound in the document):
a) Project specification;
b) SABS 1200 AH or SABS 1200 A or SABS 1200 AA, as applicable; and
c) SABS 1200 H or SABS 1200 HA or SABS 1200 HE, as applicable.
APPLICATION. This specification contains clauses that are generally applicable to cladding and sheeting
contracts. Interpretations of and variations to this specification are set out in Portion 2 of the
project specification (see 2.1).
DEFINITIONS AND ABBREVIATIONS. For the purposes of this specification the definitions and abbreviations
given in the applicable of the specifications listed in 2.1, and the following definitions and
abbreviations shall apply:
a) Definitions
Accessories. Gutters, ridge capping, flashings, downpipes, gutter brackets, fasteners and the like.
Box-ribbed sheeting (trapezoidal sheeting). Profiled sheeting that has formed into it, at regular
intervals, a series of trapezoidal ribs (see Fig. 1).
Contractor. The party who is identified as the Contractor in the applicable conditions of contract and
who, for the purposes of this specification,
a) may be the principal contractor for a civil engineering construction project,
b) without relieving the principal contractor of any of his responsibilities in terms of the conditions
of contract, may be the sheeting contractor.
De-indexing. The releasing of the interlock between profiled sheets.
Flute. The upper surface of a corrugation or rib or the surface between two corrugations or ribs of a
box-ribbed sheet (see Fig. 1).
Mill finish. The "as rolled" natural finish of a metal sheet before any further work is done on it.
Negative load. A force normal to the plane of sheeting or cladding and so acting as to pull the sheeting
or cladding away from the supporting structure.
Oil canning. Minor distortion in the form of waviness or out-of-flat in a profiled sheet, normally
caused by local buckling of the sheet -Pan. The flat portion between tshhee reitb mse tianl .a ribbed trough (standing seam) sheet (see Fig. 1).
Positive load. A force normal to the plane of sheeting or cladding and so acting as to push the sheeting
or cladding towards the supporting structure.
Profiled sheeting. Sheeting having longitudinal ribs or corrugations that are intended to increase its
resistance to transverse loads. (Profiled sheeting may be of the corrugated, box-ribbed or ribbed trough
(standing seam) type (see Fig. 1) .) -Rib.
Ribbed trough (standing seam) sheetinq. Sheeting having a pan-type profile stiffened with a series of
standing seams or ribs spaced at set centres (see Fig. 1).
Sheeting contractor. A contractor (either nominated or otherwise) who specializes in cladding and
sheeting construction and who is employed for this purpose by the Contractor-
Side stitching. Fasteners placed at set intervals through a side lap to give positive mechanical
connection and improved sealing between adjacent sheets. (In the case of ribbed trough (standing seam)
sheeting, side laps may be button-punched to achieve the same result.)
STpaainl . stitching. Fasteners placed in the end lap to give positive mechanical connection and improved
sealing between adjacent sheets.
Trough (valley). The part of the cross-section of a profiled sheet that is intended to conduct water
(see Fig. 1).
Unclipping. The releasing of a profiled sheet from its fasteners.
Wet-storage stain. A stain produced on galvanized sheets by the formation of zinc hydroxide when
moisture (e.g. from rain or condensation) is present between stacked sheets.
or
-
A longitudinal upstand in profiled sheeting, produced by forming or folding.
The distance between the centre-lines of sheet supports in the plane of the sheeting.
b) Abbreviations
FC : Fibre cement
GRP: Glass-reinforced polyester 原件下载：  |
