note: finished floor levels of
un-insulated areas to line
through with insulated floors
throughout.
lean mix fill to base of cavities
sloped off to open perpends in
external leaf
100.0 60.0
140.0
140mm medium density
aggregate blockwork, min
7.3N/mm2
note: finished floor levels of
un-insulated areas to line
through with insulated floors
throughout.
external facing brickwork with
timber frame inner leaf (see
superstructure drawings for
wall types and linings)
75mm sand cement screed
proprietary plastic weephole
vent (colour to match brickwork
shade) at 665mm horizontal
centres in brick course directly
above dpc
140.0
300.0
DETAIL B
75.0
140.0
300.0
Typical sub-structure detail: junction between external wall and insulated floor, floor beams
perpendicular to wall
DETAIL C
Typical sub-structure detail: junction between external wall and un-insulated floor (garage), floor
beams parallel to wall
internal timber framed
separating wall (refer to
superstructure plans for details
of construction, widths and
linings)
internal timber framed
separating wall (refer to
superstructure plans for details
of construction, widths and
linings)
seal base of cavities using
proprietary insulated seal
(Monarfloor Wall Cap
Lamatherm or similar)
seal base of cavities using
proprietary insulated seal
(Monarfloor Wall Cap
Lamatherm or similar)
seal below skirting board using
flexible mastic sealant or
decorators caulking to help
reduce air leakage.
75mm sand cement screed
75mm Celotex FR5000
FFL
insulation
polythene adhesive damp
proof membrane turned up
face of cut block and tucked in
beneath timber frame sole FFL
plate
150.0
seal below skirting board using
flexible mastic sealant or
decorators caulking to help
reduce air leakage.
300.0
225.0
100.0 60.0
100mm medium density
aggregate blockwork, min
7.3N/mm2
Refer to piling and ground
beam design for details of
foundations
150.0
150.0
150.0
150.0
150.0
140mm medium density
aggregate blockwork, min
7.3N/mm2
75.0
polythene adhesive damp
proof membrane turned up
face of cut block and tucked in
beneath timber frame sole FFL
plate
paint ends of beams, blocks
and cut block over using two
coats RIW Flexiseal
Beam and block floors to be
raised by 75mm where
insulation is not required within
floors i.e garages and external
stores
proprietary plastic air brick and
periscope ventilators at max
1.8m centres to vent void
below susp. floor
lean mix fill to base of cavities
sloped off to open perpends in
external leaf
100.0 60.0
Refer to piling and ground
beam design for details of
foundations
Typical sub-structure detail: junction between external wall and insulated floor, floor beams parallel
to wall
Beam and block floors to be
raised by 75mm where
insulation is not required within
floors i.e garages and external
stores
300.0
Refer to piling and ground
beam design for details of
foundations
proprietary flexible polythene
dpc at min 150mm above
external ground level
lean mix fill to base of cavities
sloped off to open perpends in
external leaf
min. 3 courses of facing
brickwork below dpc level.
increase as necessary if
ground level varies
Millbank T150 precast concrete
floor beam (see substructure
plan for details of span and
spacing)
140mm polythene dpc below
end of beams acting as slip
membrane
100mm medium density
aggregate blockwork, min
7.3N/mm2
300.0
DETAIL A
paint ends of beams, blocks
and cut block over using two
coats RIW Flexiseal
polythene adhesive damp
proof membrane turned up
face of cut block and tucked in
beneath timber frame sole FFL
plate
150.0
100mm medium density
aggregate blockwork, min
7.3N/mm2
75mm sand cement screed
proprietary stainless steel
timber frame wall ties (Ancon
or similar) at 600mm horizontal
and 4500mm vertical centres
100.0 60.0
140.0
300.0
140mm medium density
aggregate blockwork, min
7.3N/mm2
100mm medium density
aggregate blockwork, min
7.3N/mm2
Refer to piling and ground
beam design for details of
foundations
proprietary plastic air bricks at
max 1.8m centres to provide
cross ventilation of voids below
susp. floor
open perpend weephole at
base of separating wall to help
drain cavity in event of flooding
Lean mix fill to base of cavity
sloped off to weephole in open
perpend
Refer to piling and ground
beam design for details of
foundations
275.0
100.0
75.0 100.0
100mm medium density
aggregate blockwork, min
7.3N/mm2
Millbank T150 precast concrete
floor beam (see substructure
plan for details of span and
spacing)
140mm polythene dpc below
end of beams acting as slip
membrane
150.0
proprietary plastic air brick and
periscope ventilators at max
1.8m centres to vent void
below susp. floor
polythene adhesive damp
proof membrane turned up
face of cut block and tucked in
beneath timber frame sole FFL
plate
150.0
150.0
150.0
paint ends of beams, blocks
and cut block over using two
coats RIW Flexiseal
proprietary plastic weephole
vent (colour to match brickwork
shade) at 665mm horizontal
centres in brick course directly
above dpc
proprietary flexible polythene
dpc at min 150mm above
external ground level
300.0
150.0
proprietary flexible polythene
dpc at min 150mm above
external ground level
75mm sand cement screed
75mm Celotex FR5000
FFL
insulation
25mm Celotex FR5000
insulation to perimeter of
screed to aid in limiting thermal
bridging
300.0
seal beneath skirting board
using flexible mastic or
decorators caulking
proprietary plastic weephole
vent (colour to match brickwork
shade) at 665mm horizontal
centres in brick course directly
above dpc
external facing brickwork with
timber frame inner leaf (see
superstructure drawings for
wall types and linings)
150.0
250mm flexible or pre-formed
dpc turned up inside face of
timber frame to reduce air
leakage
150.0
external facing brickwork with
timber frame inner leaf (see
superstructure drawings for
wall types and linings)
EXCAVATION & FILLING:
- Generally clear site of rubbish, debris and vegetation prior to topsoil stripping. DO NOT compact topsoil .
- Apply a suitable non-residual herbicide to areas to receive planting.
- Before beginning general excavation or filling, strip topsoil from areas where there will be regrading, buildings,
pavings/roads and other areas as shown on drawings to an average depth of 300mm.
- To areas designated for landscaping and rear gardens provide a topsoil strip of an average depth of 600mm in
accordance with recomendations given within site investigation report by Messrs Delta Simons ref. 13-0790.01 dated
March 2014. Replace with certified 'clean' topsoil.
- Contaminated materials are to be taken to a licensed disposal centre with paperwork provided to the structural
engineer to allow a validation report to be prepared for contamination remediation.
- Excavate to formation levels and store spoil on site for the explicit use as backfill material.
- Permissible deviation from ground levels abutting external walls to be
but such as to ensure that finished level
is not less than 150mm below dpc.
- Keep all excavation clear from water until formations are covered and below ground constructions are complete.
- Surfaces of excavations and areas to be filled are to be kept free from loose spoil, topsoil, organic material, rubbish
and standing water. Do not place fill on frozen surfaces.
- Excavation sides cannot be guaranteed to be stable on this site, therefore batters and/or suitable support should be
included for trench excavations especially where human entry is necessary.
- Compact fill not specified to be left loose as soon as possible after placing. Surface of each layer must be well closed,
showing no movement under compaction plant, and without cracks, holes ridges, loose material and the like.
- Backfilling around foundation to be granular hardcore material, free from excessive dust, well graded, all pieces less
than 75mm in any direction, minimum 10% fines value of 50kN when tested in a soaked condition to BS 812-111 and
well compacted in layers not exceeding 150mm.
- Backfilling under grassed or soil areas to be 'as dug' material, laid and compacted in layers not exceeding 300mm.
- Blind formations to receive sheet overlays or concrete using either; sand, fine gravel, or other fine material applied to
fill interstices or; sand for blinding to BS EN 12620, grade 0/4 or 0/2 (MP). Moisten as necessary before final rolling to
provide a flat, closed, smooth surface. Permissible deviation on surface level to be +0:-25mm.
Typical sub-structure detail: junction between external wall and un-insulated floor (garage), floor
beams perpendicular to wall
DETAIL E
Typical sub-structure detail: separating wall, insulated floor to insulated floor. beams
perpendicular to wall.
-
open perpend weephole at
base of separating wall to help
drain cavity in event of flooding
DETAIL F
275.0
100.0
75.0 100.0
100mm medium density
aggregate blockwork, min
7.3N/mm2
-
Typical sub-structure detail: separating wall, insulated floor to insulated floor. beams parallel and
perpendicular to wall
-
-
note: finished floor levels of
un-insulated areas to line
through with insulated floors
throughout.
internal timber framed
separating wall (refer to
superstructure plans for details
of construction, widths and
linings)
75mm sand cement screed
75mm Celotex FR5000
insulation
100mm medium density
aggregate blockwork, min
7.3N/mm2
open perpend weephole at
base of separating wall to help
drain cavity in event of flooding
Lean mix fill to base of cavity
sloped off to weephole in open
perpend
Refer to piling and ground
beam design for details of
foundations
DETAIL G
275.0
100.0
75.0 100.0
Typical sub-structure detail: separating wall, un-insulated floor (garage) to insulated floor. beams
perpendicular to wall
Beam and block floors to be
raised by 75mm where
insulation is not required within
floors i.e garages and external
stores
100mm medium density
aggregate blockwork, min
7.3N/mm2
open perpend weephole at
base of separating wall to help
drain cavity in event of flooding
Lean mix fill to base of cavity
sloped off to weephole in open
perpend
Refer to piling and ground
beam design for details of
foundations
DETAIL H
275.0
100.0
75.0 100.0
Typical sub-structure detail: separating wall, un-insulated floor to un-insulated floor. beams
perpendicular to wall.
1
Below ground masonry should be solidly bonded and put together in half lap stretcher bond using proprietary 1:3
mortar to BS EN 1996-2.
Blockwork in outer leaf of external cavity walls to be replaced with facing brickwork for a minimum of 225mm below
dpc level. Vary depth accordingly to ensure facing brickwork only is seen above finished ground levels.
Provide GEN1 designated mix concrete fill to base of cavities to a depth terminating minimum 75mm from external
finished ground level and minimum 225mm from dpc.
At drainage and services penetrations below ground provide suitable sized openings in cavity masonry to allow
minimum 50mm cover to pipework. Provide proprietary pre-stressed concrete lintels (65mm depth x blockwork depth
unless stated otherwise) over openings formed below ground ensuring minimum 150mm end bearings both sides. Fill
gaps around pipes passing through structure using proprietary compressible material (mineral wool insulation or
similar) and mask entire opening using fibre cement boarding (Supalux or similar) to prevent vermin entry into cavities
and beneath floor voids.
Provide proprietary plastic air bricks and periscope ventilators to external cavity, separating and load-bearing sleeper
walls at max. 2m centres to provide ventilation to void beneath suspended floor.
Terminate masonry at dpc level, generally not less than 150mm above finished external ground levels and provide
minimum 100mm (width varies dependant upon width of masonry beneath) polythene or bitumen damp proof course
ensuring minimum 100mm end laps or welted joints. Dpc should be linked to damp proof membrane within
suspended floor.
Dpc materials to comprise either; 0.5mm minimum thickness polythene to BS 6515 or; bitumen to BS 6398.
step dpm as required
100mm coursing block to make
up levels below load-bearing
partition
seal below skirting board using
flexible mastic sealant or
decorators caulking to help
reduce air leakage.
-
NOTE: REFER TO SUPERSTRUCTURE DRAWINGS FOR DETAILS OF ABOVE GROUND CONSTRUCTION.
300.0
150.0
-
Provide minimum 25mm of flooring insulation to perimeter of screed abutting un-heated areas to aid in the reduction
of thermal bridging.
Lap damp proof membrane within floor to dpc in internal leaf of external cavity walls by minimum 100mm.
Dpcs directly beneath timber frame sole plates in external and separating cavity walls to be minimum 250mm wide
with excess material turned up internal face of timber frame before linings are fixed to aid in the reduction of air
permeability through the junction. Seal beneath timber skirting boards at junctions with floor prior to floor finish using
flexible mastic sealant or decorators caulking to aid in the reduction of air permeability.
Provide a damp proof course to the internal leaf of masonry directly below the bearing of the concrete floor beams
comprising either bitumen to BS 6398 or Polyethylene to BS 6515. Polyethylene dpcs to be a minimum of 0.5mm
thick.
All voids beneath suspended floor to be a minimum of 150mm deep. Formation levels beneath suspended floors to
be treated with a suitable organic weedkiller in advance of laying floors.
REV DATE
DESCRIPTION
CF
215mm medium density
aggregate trench blockwork,
min 7.3N/mm2
for construction
215.0
D Brown Building Contr's Ltd
Chaplin Farrant Limited
51 Yarmouth Road
Norwich
NR7 0ET
Tel: 01603 700000
Fax: 01603 700001
Typical sub-structure detail: internal load-bearing partition, insulated floor to un-insulated floor.
beams perpendicular to wall
[email protected]
www.chaplinfarrant.com
Also at:
London
Winchester
Southampton
Great Yarmouth
This drawing is copyright of the
Architects and shall not be
reproduced without their
permission.
Check all dimensions and report
any errors or omissions.
Do not scale from this drawing.
CLIENT
Residential Development,
Blue Street,
Boston, Lincs
PROJECT
Substructure Plan:
Details
DRAWING
4666
PROJECT REF:
211
DRAWING NO:
Mar 14
DATE
SUBSTRUCTURE DETAILS
CHECKED BY
Architects Engineers Quantity Surveyors
100mm medium density
aggregate blockwork, min
7.3N/mm2
Refer to piling and ground
beam design for details of
foundations
DETAIL J
DRAWN
Revisions
DRAWING TO BE READ IN CONJUNCTION WITH ALL SUBSTRUCTURE DRAWINGS REF. 4666/200 - 223.
Beam and block floors to be
raised by 75mm where
insulation is not required within
floors i.e garages and external
stores
proprietary plastic air bricks at
max 1.8m centres to provide
cross ventilation of voids below
susp. floor
-
150.0
225.0
150.0
75.0
75mm sand cement screed
75mm Celotex FR5000
FFL
insulation
150.0
300.0
225.0
150.0
75.0
225.0
150.0
Beam and block floors to be
raised by 75mm where
insulation is not required within
floors i.e garages and external
stores
0
SUSPENDED GROUND FLOOR CONSTRUCTION:
- Suspended ground floors to comprise;
75mm proprietary un-bonded sand cement screed to BS 8204-1:2003+A1:2009 on;
125 micron (500 gauge) polythene vapour control layer on;
75mm Celotex FR5000 PIR insulation on;
300 micron (1200 gauge) polythene damp proof membrane or bitumen sheeting to BS 743.
150mm Millbank T150 pre-cast concrete beam and concrete block suspended floor in configuration as shown on
substructure layout plans.
- Blocks used in suspended floors to be medium density concrete blocks within a minimum compressive strength of
-
polythene adhesive damp
proof membrane turned up
face of cut block and tucked in
beneath timber frame sole FFL
plate
seal below skirting board using
flexible mastic sealant or
decorators caulking to help
reduce air leakage.
75.0
polythene adhesive damp
proof membrane turned up
face of cut block and tucked in
beneath timber frame sole FFL
plate
seal below skirting board using
flexible mastic sealant or
decorators caulking to help
reduce air leakage.
note: finished floor levels of
un-insulated areas to line
through with insulated floors
throughout.
internal timber framed partition
wall (refer to superstructure
plans for details of
construction, widths and
linings)
75mm sand cement screed
150.0
note: finished floor levels of
un-insulated areas to line
through with insulated floors
throughout.
internal timber framed
separating wall (refer to
superstructure plans for details
of construction, widths and
linings)
N
FOUNDATIONS GENERALLY:
- Foundations generally to comprise cast in-situ augered or precast driven piles and ground beams in accordance with
the structural engineers design.
- Concrete reinforced ground beams generally to be designated mix RC25/30 to BS 8500 and BS EN 206-1.
- Ready mixed concrete should be placed within 2 hours of water being added to the cement. Additional water should
not be added to ready mixed concrete unless under the supervision and approval of the supplier. Concrete should not
be placed in or under water, unless it has been specifically designed to do so.
- Concrete should wherever possible be carried out in one operation (max
for reinforced concrete) and should be
as square in shape as possible. Construction joints should be formed only if unavoidable and then in consultation with
the engineer.
- Freshly poured concrete should be kept moist by covering as soon as the surface is hard enough to resist damage
using either; damp hessian; damp sharp sand or polythene sheeting.
- Ready mixed concrete is to be sourced from suppliers operating under the Quality Scheme for Ready-Mix Concrete
(QSRMC) or BSI Kitemark Scheme.
- Steelwork reinforcement generally to BS 4449, BS 4482, BS 4483 or BS 6744 depending upon material used and
should be sourced from companies holding valid certificates of approval for product conformity issued by the UK
Certification Authority for Reinforced Steels (CARES).
- Cutting and bending of reinforcement should be as designed by the structural engineer and to BS 8666 and should be
fixed in accordance with BS 7973-1 & 2.
- Provide suitable formwork to sides of ground beams as necessary to trenches with battered sides. Formwork should
be set out accurately in relation to relevant reference lines and benchmarks to ensure that concrete cover to steelwork
reinforcement is not compromised and is maintained along the length.
- Formwork should be capable of being struck without damage to the concrete. Support for loadbearing concrete
should not be removed until the concrete has achieved sufficient strength as detailed by the engineer.
- Concrete foundations free from any additives should be left, covered, to cure for a minimum period of 7 days unless
stated otherwise by the structural engineer. The concrete structure should not be loaded during this period. Consult
concrete supplier's advice regarding curing times for ready mixed concrete containing any addatives etc.
- All foundations to be constructed in accordance with details provided by the structural engineer, positioned concentric
about overall structural wall centre line and minimum 600mm wide unless shown otherwise.
- Piles are to be vertical, unless designed otherwise. If piles are are installed more than 75mm out of position, or are
out of alignment by more than 1:75, the engineer should reconsider the adequacy of the foundation design.
- The contractor is to ensure the bond of beams to piles or pads is in accordance with the design and is adequate.
- Test loading should be undertaken when required and the contractor is to provide written confirmation that the piles
are suitable for their design load.
- Any discrepancies in dimensions and any ground conditions which may cause the design to be modified, should be
reported formally to the structural engineer.
- Where localised changes in strata give rise to differences in bearing capacity, reference should be made to the
structural engineer to ensure this has been allowed for in the design.
- Pile and ground beam designs have been designed based upon recommendations provided within the ground
investigation for the site ref. 13-0790.01 by Messrs Delta Simons. Piling contractor to confirm sub soil bearing prior to
commencement of piling operations.
- It shall be the responsibility of the contractor to check all setting out information (levels, dimensions, co-ordinates etc)
Indicated on the substructure drawings prior to the commencement of the works, the engineer shall be notified of any
discrepancies and no works shall be commenced until further instructions are received in writing.
-
DETAIL D
DETAILS
WALL CONSTRUCTION GENERALLY (BELOW DPC):
- Raise from concrete foundations external, separating and load bearing sleeper walls comprising 100, 140 & 215mm
thick concrete blockwork set out in positions as shown on sub-structure layout plans.
- Below ground masonry to be medium density concrete blockwork with a minimum compressive strength of
proprietary plastic air bricks at
max 1.8m centres to provide
cross ventilation of voids below
susp. floor
Lean mix fill to base of cavity
sloped off to weephole in open
perpend
Refer to piling and ground
beam design for details of
foundations
CONSTRUCTION NOTES:
krb
DRAWN BY
-REVISION
1:10
SCALE
nm
CHECKED BY