This section gives guidance on drawn information to be issued to tenderers. It covers contracts with and without quantities, sets out the definitions and rules relating to drawn information in the Seventh Edition of the Standard Method of Measurement of Building Works (SMM7) and gives guidance on how those requirements may be satisfied.
Prior to tender stage drawn information is used mainly forthe measurement of quantities. On 'with quantities' contracts SMM7 requires drawn information to be provided to tenderers to give:
The requirements for provision of this information are dealt with in detail below. Drawings selected from those normally available for construction of the project should satisfy the SMM7 requirements (except for dimensioned diagrams).
Apart from the specific requirements for provision of drawings, SMM7 allows descriptive and specification information to be given on drawings or in the specification provided a specific cross-reference is given in the bill of quantities description of the item (SMM7 General Rule 4.2).
The SMM7 rules for Preliminaries/General conditions require certain location drawings to accompany the bill of quantities. These are defined in General Rule 5.1 as follows:
The architect's smaller scale location drawings will normally satisfy this requirement. The majority of work sections in SMM7 commence with a statement of the information to be provided specifically for that type of work. The requirements will normally be met by the architect's location drawings referred to above. If not, other drawings produced by the architect, structural, mechanical and electrical engineers etc should be provided. Figure 1 is a checklist of all SMM7 requirements for provision of location drawings.
SMM7 applies equally to all with quantities projects. However, when deciding which drawings to include to comply with the rules, the type, size and relative complexity of the particular project will need to be considered. For example the scope and location of foul drainage above ground for a simple single storey building may be adequately defined by the general arrangement floor plan showing the sanitary appliances whereas more detailed drawn information will be required for this work in a more complex building.
In addition to the requirements concerning location drawings there are other SMM7 rules, which although not specifically referring to drawings, can often be complied with to best advantage by giving information on drawings referenced from the bills of quantities. An example is Section D20 Excavating and filling which requires details of:
Component drawings are required by General Rule 5.2 to show the information necessary for the manufacture and assembly of components. Figure 2 is a checklist of all SMM7 requirements for provision of component drawings.
Dimensioned diagrams are required by SMM7 General Rule 5.3 to show the shape and dimensions of the work covered by an item. They may be used at the discretion of the quantity surveyor as an alternative to a dimensioned description except in those cases where there is a specific requirement for a dimensioned diagram.
Dimensioned diagrams may be prepared by the quantity surveyor or, on his behalf, by the architect. They can also be extracts from the architect' or engineer's drawings reproduced at a suitable size for incorporation in the bills of quantities.
Dimensioned diagrams should not appear in documentation other than the bills of quantities. However, there may be occasions where it is more appropriate to issue the architect's or engineer's drawings with the bills of quantities rather than produce dimensioned diagrams. In such instances it will be necessary to identify the drawings in the bill description.
The tender documentation will include the bills of quantities, the tender drawings, the project specification (as appropriate), the form of tender and the letter of invitation. The bills of quantities will list the drawings from which the bills have been prepared, and copies of these should be kept as a record. It is good practice to indicate which of the drawings listed accompany the tender documents.
As much of the drawn information as possible should be contained within the bills of quantities to minimise the problem of expensive reproduction of drawings. The provision of copy negatives or similar methods rather than prints will also assist in keeping down tendering costs.
It will be of assistance to contractors if, when domestic sub-contractors are named in bills of quantities, the drawings and the specification relevant to their work are sent to them direct, obviating the need for all tendering contractors to do so when they can see from the bill that this has been done.
SMM7 Section |
Drawn Information to be provided |
|
A |
Preliminaries / General conditions |
|
|
|
Location drawings required to accompany the bills of quantities:
- Block plan
- Site plan
- Plans, sections and elevations
The full definition of these drawings is given in the text above. |
|
The information required to be provided in connection with the following work sections is to be shown either on the above mentioned location drawings or on further drawings which accompany the bills of quantities. The exception to this is drawn information marked * where specific location drawings are to be provided. |
|
C |
Demolition / Alteration / Renovation |
|
C10 |
Demolishing structures |
Location and extent of existing structures to be demolished. |
|
C20 |
Alterations — spot items |
Scope and location of the work relative to the existing layout indicating existing structure. |
|
C30 |
Shoring |
As C10 |
|
C40 |
Repairing/Renovating concrete / brick / block / stone |
Scope and location of the work relative to the existing layout indicating
existing structure. |
C41 |
Chemical dpc’s to existing walls |
|
C50 |
Repairing / Renovating metal |
Scope and location of the work. |
C51 |
Repairing / Renovating timber |
C52 |
Fungus / Beetle eradication |
|
D |
Groundwork |
|
D20 |
Excavation and filling - excavating |
Location drawing* showing pile sizes and layouts. |
|
D30 |
Cast in place concrete piling |
Location drawing* showing:
-
General piling layout.
- Position of different types of piles.
- Position of the work within the site and of existing services.
- Relationship to adjacent buildings.
|
D31 |
Preformed concrete piling |
D32 |
Steel piling |
|
D40 |
Diaphragm walling |
Location drawing* showing:
- Arrangement of diaphragm walls and their relationship to surrounding buildings.
- Depths, lengths and thicknesses of diaphragm walls.
|
|
D50 |
Underpinning |
Location and extent of the work and details of the existing structure to be underpinned. |
|
E |
In-situ concrete / Large precast concrete |
|
E10 |
In-situ concrete |
Relative position of concrete members, the size of members, the thickness of slabs and the permissible loads in relation to casting times. |
|
E11 |
Gun applied concrete |
Relative position of gun applied concrete members and the permissible loads in relation to casting times. |
|
E20 |
Formwork for in-situ concrete |
As
E10 |
E30 |
Reinforcement for in-situ concrete |
E31 |
Post-tensioned reinforcement for in-situ concrete |
E42 |
Accessories cast into in-situ concrete |
|
E50 |
Precast concrete large units |
Details of precast members showing stressing arrangements and full details of anchorages, ducts, sheathing and vents.
Relative positions of concrete members, the size of members, the thickness of slabs and the permissible loads. |
|
E60 |
Precast / Composite concrete decking |
Relative positions of concrete members, the thickness of slabs and the permissible loads. Details of purpose-made, prestressed concrete members showing stressing arrangements and full details of anchorages, ducts, sheathing and vents. |
|
F |
Masonry |
|
F10 |
Brick / block walling |
Plans of each floor level and principal sections showing the position of and the materials used in the walls.
External elevations showing the materials used. |
F11 |
Glass block walling |
F20 |
Natural stone rubble walling |
F21 |
Natural stone / ashlar walling / dressings |
F22 |
Cast stone walling/dressings |
F30 |
Accessories/Sundry items for brick / block / stone walling |
|
F31 |
Precast concrete sills / lintels / copings / features |
As E50 |
|
G |
Structural / Carcassing metal / timber |
|
G10 |
Structural steel framing |
Position of work in relation to other parts of the work and of the proposed buildings.
Types
and sizes of structural members and their position in relation to each other. Details of connections or of the reactions, moments and axial loads at connection points. |
G11 |
Structural aluminium framing |
G12 |
Isolated structural metal members |
|
G20 |
Carpentry/Timber framing/First fixing |
Scope and location of the work. |
|
G30 |
Metal profiled sheet decking |
Extent of the work and its height above ground level.
Size of units where not at the discretion of the Contractor. |
G31 |
Prefabricated timber unit decking |
G32 |
Edge supported/Reinforced woodwool stab decking |
|
H |
Cladding / Covering |
|
H10 |
Patent glazing |
Scope and location of the work. |
H11 |
Curtainwalling |
H12 |
Plastics glazed vaulting/walling |
H13 |
Structural glass assemblies |
|
H30 |
Fibre cement profiled sheet cladding/covering/siding |
Extent of the work and its height above ground level. |
H31 |
Metal profiled / flat sheet cladding/ covering / siding |
H32 |
Plastics profiled sheet cladding / covering / siding |
H33 |
Bitumen and fibre profiled sheet cladding / covering |
|
H40 |
Glass reinforced cement cladding / features |
As E50 |
|
H41 |
Glass reinforced plastics cladding / features |
As
H30 |
|
H50 |
Precast concrete slab cladding / features |
As E50 |
H51 |
Natural stone slab cladding / features |
Scope and location of the work. |
H52 |
Cast stone slab cladding / features |
|
H60 |
Clay/concrete roof tiling |
Extent of roofing work and its height above ground level. |
H61 |
Fibre cement slating |
H62 |
Natural slating |
H63 |
Reconstructed stone slating / tiling |
H64 |
Timber shingling |
|
H70 |
MaIIeable metal sheet prebonded coverings / cladding |
Extent of roofing work and its height above ground level including the location and spacing of all laps, drips, welts, cross welts, beads, seams, rolls, upstands and downstands. |
H71 |
Lead sheet coverings / flashings |
H72 |
Aluminium sheet coverings / flashings |
H73 |
Copper sheet coverings / flashings |
H74 |
Zinc sheet coverings / flashings |
H75 |
Stainless steel sheet coverings / flashings |
H76 |
Fibre bitumen thermoplastic sheet coverings / flashings |
|
H |
Work to existing buildings |
Scope and location of the work relative to:
- The existing layout indicating the existing structure.
- The proposed layout.
|
|
J1 |
Waterproofing |
|
J10 |
Specialist waterproof rendering |
Scope and location of the work. |
|
J20 |
Mastic asphalt tanking/damp proof membranes |
Plan of each level indicating the extent of the work and its height above ground level together with restrictions on the siting of plant and materials.
Section indicating the extent of the tanking work. |
J21 |
Mastic asphalt roofing / insulation / finishes |
J22 |
Proprietary roof decking with asphalt finish |
J30 |
Liquid applied tanking/damp proof membranes |
J31 |
Liquid applied waterproof roof coatings |
J40 |
Flexible sheet tanking/damp proof membranes |
Plan at each level indicating the extent of the roofing work and its height above ground level together with any restrictions on the siting of the plant. |
J41 |
Built up felt roof coverings |
J42
|
Single layer plastics roof coverings |
J43 |
Proprietary roof decking with felt finish |
|
J |
Work to existing buildings |
Scope and location of the work relative to:
- The existing layout indicating the existing structure.
- The proposed layout.
|
|
K |
Linings / Sheathing / Dry partitioning |
|
Kb |
Plasterboard dry lining |
Scope and location of the work. Services located within the ceiling or partition where the work includes complex integral services. |
|
K30 |
Demountable partitions |
Scope and location of the work. Services located within the partition. |
|
K31 |
Plasterboard fixed partitions / innerwalls / linings |
As K10 |
|
K32 |
Framed panel cubicle partitions |
Scope and location of the work. |
|
K33 |
Concrete / Terrazzo partitions |
As E50 |
K40 |
Suspended ceilings |
Scope and location of the work including integral fittings.
Services located within the suspended ceiling void including any additional support for same. |
|
K41 |
Raised access floors |
Scope and location of the work. |
|
K |
Work to existing buildings |
Scope and location of the work relative to:
- The existing layout indicating the existing structure.
- The proposed layout.
|
|
L |
Windows / Doors / Stairs |
|
L |
Work to existing buildings |
Scope and location of the work relative to:
- The existing layout indicating the existing structure.
- The proposed layout.
|
|
M |
Surface finishes |
|
M10 |
Sand cement / Concrete / Granolithic screeds / flooring |
Scope and location of the work. |
|
M11 |
Mastic asphalt flooring |
As J20 |
|
M12 |
Trovvelled bitumen / resin / rubber-latex flooring |
Scope and location of the work. |
M20 |
Plastered / Rendered / Roughcast coatings |
M21 |
Insulation with rendered finish |
M22 |
Sprayed mineral fibre coatings |
M23 |
Resin bound mineral coatings |
|
M30 |
Metal mesh lathing / Anchored reinforcement for plastered coatings |
Scope and location of the work.
Services located within the lathing, where the work includes complex integral services. |
|
M31 |
Fibrous plaster |
Scope and location of the work. |
M40 |
Stone / Concrete / Quarry / Ceramic tiling / mosaic |
M41 |
Terrazzo tiling/In-situ terrazzo |
M42 |
Wood block / Composition block / Parquet flooring |
M50 |
Rubber / Plastics / Cork / Lino / Carpet tiling / sheeting |
M51 |
Edge fixed carpeting |
|
M |
Work to existing buildings |
Scope and location of the work relative to:
- The existing layout indicating the existing structure
- The proposed layout.
|
|
P |
Building fabric sundries |
|
P30 |
Trenches / Pipeways / Pits for buried engineering services |
Layout of the services. |
P31 |
Holes / Chases / Covers / Supports for services |
|
Q |
Paving / Planting / Fencing / Site furniture |
|
Q10 |
Stone / Concrete / Brick kerbs / edgings / channels |
Scope and location of the work. |
|
Q21 |
In-situ concrete roads / pavings / bases |
As E10 |
|
Q22 |
Coated macadam / Asphalt roads / pavings |
Scope and location of the work. |
Q23 |
Gravel / Hoggin roads / pavings |
Q24 |
Interlocking brick / block roads / pavings |
Q25 |
Slab / Brick / Sett / Cobble pavings |
Q26 |
Special surfacings / pavings for sport |
Q30 |
Seeding / Turfing |
Q31 |
Planting |
|
Q40 |
Fencing |
Scope and location of the work.
Location of fencing specially designed to suit sloping ground. |
|
R |
Disposal systems |
|
R10 |
Rainwater pipework / gutters |
Scope and location of the work. |
R11 |
Foul drainage above ground |
|
R12 |
Drainage below ground |
Layout of the drainage. |
R13 |
Land drainage |
|
X |
Transport systems |
|
|
All sections |
Scope and location of the works, including extent of work in motor machinery or plant rooms. |
|
Y |
Services |
|
Y10 |
Pipelines |
Scope and location of the work including extent of work in plant rooms. |
Y11 |
Pipeline ancillaries |
Y20 to Y25 |
General pipeline equipment |
Y30 |
Air ductlines |
Y31 |
Air ductline ancillaries |
Y40 to Y46 |
General air ductline equipment |
Y50 |
Thermal insulation |
Y52 |
Vibration isolation mountings |
Y53 |
Control components – mechanical |
|
Y60 |
Conduit and cable trunking |
Scope and location of the work. |
|
Y61 |
HV / LV cables and wiring |
Scope and location of the work.
For final circuits:
- Distribution sheet* setting out the number and location of all fittings and accessories.
- Location drawing* showing the layout of the points.
|
Y62 |
Busbar trunking |
|
Y63 |
Support components – cables |
Scope and location of the work. |
Y70 |
HV switchgear |
Y71 |
LV switchgear and distribution boards |
Y72 |
Contactors and starters |
Y73 |
Luminaires and lamps |
Y74 |
Accessories for electrical services |
|
Y80 |
Earthing and bonding components |
As Y61 |
|
Y92 |
Motor drives - electric |
Scope and location of the work. |
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