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FOR THE CIVIL ENGINEERING SECTOR Precast Products Hanson Building Products Structural

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Page 1: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

FOR THE CIVIL ENGINEERING SECTORPrecast Products

Hanson Building Products

Structural

Page 2: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

Box Culverts

System overview 4

Benefits 5

Design and specification 6-7

Technical data 8-9

Installation guide 10-11

Omnia Bridge Deck

System overview 12

Benefits 13

Product details 14

Manufacture 15

Delivery, offloading 16-17

and erection

Hanson Quickbuild™ Wall System

Systems overview 18

Benefits 19

Bespoke Products

Expertise and 20-21

capabilities

Nationwide service 22

Hanson Building Products provides structural precast concrete solutions andproducts for civil engineering, commercial and domestic applications.

In addition to our dedicated flooring products the company designs, manufactures and supplies non-standard structural precast components to clients’ specifications.

Quickbuild™ walls

Escape shafts

2

Retaining walls and flood defence

FOR THE CIVIL ENGINEERING SECTORPrecast Products

Structural

Page 3: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

By taking an active involvement in the

design work to offer value engineered

solutions, Hanson Building Products is

able to offer a competent and

economic service, to provide quality

assured units to a wide range of

bespoke precast concrete structures.

These include :

Box culverts and channel sections

Omnia Bridgedeck

Beams

Columns

Wall and floor panels

Sandwich panels

Bespoke units to a maximum

handling capacity of 24 tonnes.

Bridge parapets

Omnia Bridgedeck

Digester tanks and other largebespoke structures

3

Box culverts and channel sections

Columns and beams

Specialist stair flights

Specialist structure precast concretecomponents can be incorporatedinto a wide range of applications.

Page 4: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

PRODUCT OVERVIEWBox CulvertsEasy to install, suitable for very shallow or deep fill, idealfor use in a wide variety of civil engineering applications

4

Hanson Building Products is thelargest producer of box culverts inthe UK, and are members of the Box Culvert Association.

Since its introduction over 45 years ago the range of box culverts we offerhas continued to expand.

Whilst offering increased flexibilityHanson Box Culverts retain all theiroriginal advantages.

They are easy to install and can bemade to suit very shallow or deep fill.

They also offer economy by beinguniquely designed for particular loading

conditions and are efficiently producedin standard sizes.

As these advantages have becomewidely recognised their range ofapplications has increased making themideal in a wide variety of civilengineering applications.

Page 5: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

Hanson Box Culverts are available in

a range of 144 standard sizes from

1000mm x 600mm to 6000mm to

3600mm. Non-standard sizes and

internal profiles can also be readily

provided including shaped inverts,

dwf channels, and units with cross

over channels.

Reference to our table of standard

sizes will give the size necessary to

meet any conditions which may be

required in terms of storage volume,

flow capacity etc. For larger culvert

widths, twin or multiple sections may

also be considered.

Unlike pipes and corrugated steel

assemblies, box culverts can be

designed to carry vertical load without

the relieving effect of side pressure.

Therefore, when culverts are used in

multiple sections, they can be laid side

by side with only a nominal gap

between them.

By comparison with arched or circular

sections no flow area is lost through

either excessive spacing apart or

curved profiles.

5

Box Culverts benefitsFlexibility of range to accommodate almost any size requirement

Availability of multi-cell sectionsUse with shaped invert for dry weather flow situations eg. sloping vee and half round

Ease of installationCan be laid as singles or in multiple runs

Accommodation of high storage volumes

Box culvert design specific to client requirement

Qualified technical department with CAD facilities, available to assist at all stages with design specification and contract development

Quality Service GuaranteedAvailable nationwide on a supply only basis Complies with all relevant standards and manufactured in accordance with ISO 9001 and 14001

Civil engineeringapplications

Culverting Watercourses

Attenuation Tanks

Road Crossings

Multi-cell Construction

Pipe Replacement

Pedestrian and Vehicle Subways

Sea Outfalls

Escape Tunnels

Shafts

Service Tunnels

Pumping Stations

Channels

Portals

Basements Solutions

CSO Chambers

Page 6: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

DESIGN & SPECIFICATIONBox Culverts

Hydraulic designDischarge rates for box culverts in the

Hanson standard range are calculated

for a gradient of 1 in 1000 in

accordance with the Colebrook-White

equation assuming the culvert running

full under uniform flow conditions.

Comparable discharge rates for

circular pipes are given in the Table 2

(overleaf).

For any gradient between 1 in 1000

and 1 in 250, the gradient multiplier

(Table 3 overleaf) should be applied.

A value of 0.3mm has been assumed

for roughness coefficient, ks, which

depends upon the accuracy of laying

and jointing in addition to the quality

of the culvert surface. Where a

different value is required, the

discharge rate at the appropriate

gradient should be adjusted by the

use of the roughness multiplier

(Table 4 overleaf).

Thus, for a 2400 x 1200 section laid

at a gradient of 1 in 500 and with an

assumed roughness coefficient of

0.6mm, the discharge rate is given by

4.29 x 1.4 x 0.93 = 5.59m3/s.

The flow capacity of a culvert is

determined by a number of different

factors. In addition to the gradient and

roughness coefficient, the geometry

of the inlet and outlet and the

tailwater level can affect the mode of

flow and may prevent the culvert from

running full or under uniform flow

conditions.

In such cases the flow capacity will be

lower than the full discharge rate.

6

Platform units

Page 7: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

7

Surface loading and fill depthLoading applied at the ground surface

and weight of fill material produce a

combination of vertical and horizontal

forces on the box culvert.

Surface loading may be specified as a

standard loading type, equivalent

uniform loading or individual wheel

loads. The critical load on a culvert can

occur at minimum or maximum fill.

Each enquiry for a culvert should state

the minimum and maximum fill depth

and the amount or type of surface

loading.

It is recommended that the minimum

fill depth should be not less than

200mm or one fifteenth of the internal

width of the culvert if this is greater.

Design anddetailingBox culverts are generally designed

and detailed in accordance with the

Box Culvert Association Standard

Specification which covers materials,

manufacturing tolerances, external

loading design and detailing standards.

Box culverts carrying highway loading

or railway loading are designed to

current standards and specification as

stipulated by the client.

The lowest grade of concrete used is

C45/55 with a 20mm maximum size

of aggregate. The nominal cover to

reinforcement complying with the

exposure requirements of BS8500.

An experienced team of engineers and

technicians backed by CAD facilities

provide a flexible and comprehensive

design and detailing service enabling

the clients design and specification

criteria to be satisfied.

D.W.F channels Animal crossing ledges (solid or cantilever)

Twin cell construction

Access units

Cast on end walls

Page 8: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

TECHNICAL DATABox CulvertsPlease size by span x height. All dimensions are internal

8

1000 1200 1500 1800 2100 2400 2700 3000 3300

600 0.53 0.65 0.83 1.01 1.19 ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘

mm 0.50 0.64 0.86 1.07 1.29

800 0.73 0.89 1.13 1.37 1.61 1.85 2.09 2.33 ✘

mm 0.77 0.99 1.33 1.67 2.01 2.36 2.71 3.06

1000 0.93 1.13 1.43 1.73 2.03 2.33 2.63 2.93 3.23mm 1.07 1.37 1.84 2.32 2.80 3.29 3.79 4.29 4.79

1200 ✘ 1.37 1.73 2.09 2.45 2.81 3.17 3.53 3.89mm 1.76 2.37 3.00 3.64 4.29 4.95 5.61 6.28

1500 ✘ ✘ 2.18 2.63 3.08 3.53 3.98 4.43 4.88mm 3.21 4.08 4.98 5.89 6.81 7.74 8.68

1800 ✘ ✘ ✘ 3.17 3.71 4.25 4.79 5.33 5.87mm 5.21 6.38 7.57 8.78 10.00 11.24

2100 ✘ ✘ ✘ ✘ 4.34 4.97 5.60 6.23 6.86mm 7.83 9.31 10.82 12.36 13.92

2400 ✘ ✘ ✘ ✘ ✘ 5.69 6.41 7.13 7.85mm 11.11 12.94 14.81 16.70

2700 ✘ ✘ ✘ ✘ ✘ ✘ 7.22 8.03 8.84mm 15.11 17.32 19.56

3000 ✘ ✘ ✘ ✘ ✘ ✘ ✘ 8.93 9.83mm 19.88 22.49

3300 ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ 10.82mm 25.48

3600 ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ 1mm

1. The standard range of box culverts generally have flat inverts and 190mm corner splays up to 4800mm span and 225mm splays from 5100mm to 6000mm span and a maximum length of 2m.

2. Sizes other than those stated can be manufactured to suit customer requirements.

3. Special internal profiles, shaped inverts and dry weather flow channels can be produced and are available on request.

Table No.1 Dimensions, flow area and discharge rate

Notes

Internalheight

Page 9: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

9

Width mm (internal span)

3600 3900 4200 4500 4800 5100 5400 5700 6000

✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘

m

✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘ ✘

m

3.53 3.83 4.13 4.43 4.73 ✘ ✘ ✘ ✘

m 5.29 5.80 6.30 6.81 7.32

4.25 4.61 4.97 5.33 5.69 6.02 6.38 6.74 7.096.95 7.62 8.29 8.97 9.64 10.28 10.96 11.64 12.32

5.33 5.78 6.23 6.68 7.13 7.55 8.00 8.45 8.909.62 10.57 11.52 12.48 13.44 14.37 15.33 16.30 17.27

6.41 6.95 7.49 8.03 8.57 9.08 9.62 10.16 10.7012.48 13.74 15.00 16.26 17.54 18.79 20.07 21.35 22.64

7.49 8.12 8.75 9.38 10.01 10.61 11.24 11.87 12.5015.49 17.07 18.67 20.27 21.88 23.48 25.11 26.74 28.37

8.57 9.29 10.01 10.73 11.45 12.14 12.86 13.58 14.3018.61 20.55 22.50 24.46 26.43 28.40 30.40 32.40 34.41

9.65 10.46 11.27 12.08 12.89 13.67 14.48 15.29 16.1021.84 24.14 26.46 28.80 31.15 33.52 35.90 38.29 40.70

10.73 11.63 12.53 13.43 14.33 15.20 16.10 17.00 17.9025.14 27.82 30.53 33.27 36.02 38.80 41.59 44.40 47.22

11.81 12.80 13.79 14.78 15.77 16.73 17.72 18.71 19.7028.52 31.59 34.71 37.85 41.02 44.22 47.44 50.68 53.93

12.89 13.97 15.05 16.13 17.21 18.26 19.34 20.42 21.5031.95 35.43 38.96 42.53 46.13 49.77 53.43 57.11 60.81

Flow area m2 Discharge rate m3/s

4. Tapered units for bends, units with manhole openings and pipe access holes can be produced and are available on request.

5. All box culverts are manufactured to order and to the specific required design criteria, the external loading conditions will govern the wall, roof and floor thickness, unit length and reinforcement content.

6. Joints are a standard rebate within the wall of the unit and the box culverts can be jointed using sealant strip to provide a seal and flexible joint if required.

7. Special insert pins are cast in to each box culvert to enable them to be lifted.

8. Channel units can also be produced if required.

Table No.2 Circular pipe discharge rates forcomparison with standard culvertsDiameter Flow area Discharge

DN m2 rate m3/s

900 0.64 0.671050 0.87 1.00

1200 1.13 1.42

1350 1.43 1.931500 1.77 2.541650 2.14 3.251800 2.54 4.08

Table No.3Gradient multiplier

Gradient Multiplier

1 in 1000 1.01 in 800 1.11 in 700 1.21 in 600 1.31 in 500 1.4 1 in 400 1.61 in 300 1.81 in 250 2.0

Table No.4Roughness multiplier

Roughnesscoefficient ks Multiplier

0.06 1.110.15 1.050.30 1.000.60 0.931.50 0.85

For more technical information please contactHanson Building Products Tel: 0870 609 7094

Page 10: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

INSTALLATION GUIDEBox Culverts

10

Delivery and offloadingIt is the contractors responsibility to

offload the box culverts on delivery.

A hard level access area should be

provided which can be used safely by

standard articulated delivery vehicles.

The contractor should provide a

suitable crane of adequate capacity

for lifting the culvert.

For reasons of safety and economy

certain box culverts are delivered to

site on end rather than as laid, and will

require a safe method of turning during

offloading. A data sheet giving

guidance of lifting and turning is

available and is issued to clients prior

to the first delivery.

The offloaded box culverts should be

levelled carefully on a firm level base

away from the edge of the trench, and

if any further movement is required it

should be by lifting; the culvert should

never be dragged or dropped.

Bedding, laying and backfillingExcavation can be kept to a minimum

with only nominal working space

required on each side of the box

culvert. When working in trenches the

normal requirements for health and

safety must always be observed.

The base of the trench should be

uniformly prepared before laying a

200mm bedding of compacted granular

material over the full width of the

trench. A surface blinding of the fine

material will assist levelling. Local

packings are subject to settlement and

should not be used.

As an alternative to granular bedding a

concrete blinding layer is sometimes

preferred to protect the formation or to

allow a faster rate of laying the culverts.

A layer of unreinforced concrete

approximately 75mm thick on a trench

bottom which has been well prepared

to provide a uniform support is

generally sufficient.

A culvert line is usually laid directly on

the bedding starting from the

downstream end with the sockets facing

upstream, to receive the next culvert.

The trench should be backfilled as soon

as possible after the culvert has been

laid and it should be filled evenly on

each side of the trench. Backfilling

should continue in 200mm compacted

layers to reach the required depth of

cover.

Where loads from construction plantmay exceed the design load of thebox culvert protective measures willbe required. This is particularlyrelevant at shallow fill depths.

Page 11: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

11

JointingThe culvert sections generally have

rebated joints and can be laid open, or

sealed using pre formed strips and/or

pointing materials. Reference should be

made to the jointing material

manufacturer’s specification and

recommendation for use of the product.

A system using preformed strip within

the joint is most commonly used. When

the strip is bitumen based the joint

faces should be cleaned, primed and

allowed to dry.

The strip is then applied to the internal

corner of the socket just before the

culvert is laid in the trench.

Joints are closed to a nominal gap by

pulling against previously laid culverts

with an applied load of approximately

one tonne per metre of strip plus about

half of the weight of the culvert unit to

overcome base friction, less if the unit

is suspended from the crane whilst

jointing.

Heat may be required to soften the

strip when working at low temperature.

When the box culvert is of sufficient

size for access, it can be pointed

internally with an elastomeric or

bitumen based material using a suitable

primer. Not all methods of jointing,

however, should be expected to be

completely watertight.

Self adhesive cover stripnominal 10mm

10

75

15

25

30

varie

s

Thic

knes

s –

roo

f /

floor

/ w

all

varie

s

joint

Foam filler

Area to be primed prior to laying units

Compressed stripwith joint closed

Foam filler/bondbreaker

Position of sealing stripbefore closing joint

Rebate for internalpointing is usedInternal pointing

Inside face

Jointing diagram

Page 12: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

PRODUCT OVERVIEWOmnia Bridge Deck

Provides a solid base for deck slabs on Civil Engineering structures

12

Omnia Bridge Deck Hanson Building Products has supplied

Omnia Bridge Deck for numerous

projects to most civil engineering

contractors.

Omnia Bridge Decking is a practical

and economical means of providing

permanent formwork to deck slabs of

bridges, especially where these span

over live roads, rail tracks and rivers.

Omnia Bridge Decking can be

considered as participating formwork,

and the concrete and reinforcement in

the pre-cast plank taken as part of the

deck with corresponding cost savings

compared to traditional methods of

construction.

Page 13: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

13

Omnia Bridge Deck BenefitsPractical and economical

Can be designed to cope with splayed and curved structures

Each panel is designed to suit its specific location

Fully participatingOmnia Bridge Decking can be considered as participating formwork, if required

Easy to handle, simple to layPanels are lifted into place without the need for slings

Minimises road/rail closures

Saves time and money on siteConcrete and reinforcement in the precast Omnia unit may be taken as part of the deck with corresponding savings

Quality serviceFactory-manufactured to consistent quality standards

Complies with all relevant standards

Omnia Bridge Deck is manufactured to all relevant British Standards and the ‘Specification for Highway Works’

Page 14: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

14

Design details and cross section

PRODUCT DETAILSBridge Deck

The planks are primarily designed to

cope with temporary condition loads

only, however it is very often the case

that Bridge Designers use the

reinforcement provided as part of the

permanent works design, and

furthermore often ask us to increase

the amount of reinforcement in the

plank thereby saving reinforcement in

the in-situ portion.

Hanson Building Products design the

planks to carry construction loading

but also limit deflections to span/400

and crack widths to 0.1mm in the

temporary case.

Wherever possible. the correct size

of lattice girder will be selected to

provide a chair for the top mat of

reinforcement and they are aligned

during manufacture to ensure ease of

fixing longitudinal reinforcement over

the Omnia planks.

There will normally be 3 or 4

reinforcing bars cast within each plank,

minimum 10mm diameter, maximum

16mm diameter.

The Interim Advice Note

(IAN 74/06) allows 35mm cover to

the reinforcement at the soffit.

Threaded anchors can also be cast

into the planks for supporting lighting,

drainage etc.

A typical cross section of a Bridge Deck plank shows the arrangement of the lattice girder and the reinforcement within the precast concrete.

130

Design cover

12mm35mm Cover

Approx 47-50mm

25mm

35 3560mm Depth of plank

300mm Prime Dimension

Tolerance on length 10mm

290mm

+0 -3

8585

Tolerance on given dimensions shall be 5mm unless shown otherwise

60mm depth of plank does not include for the exposed aggregate finish which could add up to 10mm to the overall depth

+–

+–

Page 15: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

15

ManufactureOmnia Bridge Deck is manufactured

to all relevant British Standards and

the ‘Specification for Highway Works’,

using C40/50 concrete in planks

300mm wide x 60mm deep, although

special widths can be manufactured up

to 600mm wide for use as infill panels

at transverse beams or abutments.

Each 300mm wide Omnia Bridge

Deck plank has an Omnia lattice girder

centrally placed and the plank is

reinforced with either 3 or 4 steel bars

10-16mm dia.

The upper surface of the Omnia planks

has a Class 2 finish as required by the

‘Specification for Highway Works’

to expose the aggregate.

This surface accommodates the

horizontal shear stresses at the

precast/in-situ interface. The

manufacturing tolerances and soffit

finish (Type F2), are also as specified

and the production process is

controlled by the procedures set out in

our model specification.

The Omnia lattice girder is at the heart

of all of the Omnia product range and

is responsible for ensuring that the

panels will span the required distance

in the temporary condition. The lattice

also acts as a physical link between

the precast panel and the in-situ

portion, and as lifting points during

erection. We will also endeavour

wherever possible to provide a lattice

girder that is set at the correct height

for placing of the top mat of

reinforcement.

MANUFACTUREBridge DeckFactory controlled production ensures accuracy in plank size,reinforcement position and cover to the soffit

2.80

3.00

3.20

3.40

3.60

3.80

4.00

23

0

24

0

25

0

26

0

Overall depth (mm)

Max

imum

Cle

ar S

pan

(m)

270

28

0

29

0

30

0

31

0

32

0

33

0

34

0

35

0

36

0

370

38

0

39

0

40

0

DimensionsOmnia Bridge Decking can be

manufactured in lengths up to 3.80m

and depending on the overall slab

depth can be used for clear spans of

3.69m with a preferred bearing of

55mm at each end.

The graph below shows the maximum

clear span for a range of span depths.

Please contact the office for spans and

depths outside of this range.

The long edges are formed with a

chamfer to the underside, so that when

placed adjacent to each other, the

effect of a birds-mouth joint at 300mm

centres can be seen on the soffit.

Planks can be manufactured with

skewed ends to suit the shape of the

structure if necessary, however as the

maximum plank length can be no

greater than 3.80m, the clear span will

be reduced.

SoffitTreatmentWe can now offer Pavix CCC100

surface protection treatment applied

at works, which meets the

requirements of BD43/03.

Please contact us for a quotation.

Hanson Omnia Bridge DeckMax Clear Span for Slabs of Overall Depth

Page 16: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

16

DELIVERY, OFFLOADINGAND ERECTION

Bridge Deck

Omnia Bridge Deck Planks are

generally laid on Structural Steel

beams, and whilst the details and

recommendations below may

apply to other structures, they are

primarily written for Steelwork

structures.

PreparationBearings

All bearings should be structurally

acceptable before any Omnia planks

are placed. Any variation in levels of

bearing will need to be addressed prior

to the planks being delivered.

Temporary Supports

Omnia Bridge Deck planks are always

designed to be erected without any

temporary props during the

construction sequence.

Minimum Bearing Dimension

All planks will be designed to have a

minimum bearing of 55mm both ends,

therefore the minimum plank length

will be ‘clear span + 110mm’ to a

maximum of 3.80m.

Prevention of grout loss

We would recommend that flanges

of steel that will be supporting Omnia

Bridge Deck planks be treated to

prevent grout loss when pouring the

in-situ section of the slab. We would

suggest a 12mm deep bituminised

compressible strip available from

a number of sources including

Illbruk Alfas at Washington

(0191-419-0505).

Safety NotesNotwithstanding the above, propping

may be necessary in the following

circumstances:-

Where the top or diagonal bars

of the Omnia lattice has been

cut or damaged.

Where the bearings are not true

and or level.

Where a bearing of less than

40mm is provided

Cantilever sections and

adjacent to the edges of

large openings

DeliveryOmnia Bridge Deck planks are

generally delivered on articulated

vehicles paletted in batches of 24

planks (6 deep x 4 wide) and will be

delivered to a previously agreed

sequence of planks and times/dates.

Depending on the spans of the planks,

each delivery will have approx. 130m²

of planks. Except where agreed

previously, the first delivery of planks

will come with a lifting frame which

should be used to lift a layer of planks.

Offloading

We would recommend that full pallets

of planks are offloaded adjacent to

their ultimate position on the

structure, and then each layer is lifted

and placed in position at a later date.

All personnel who are required

to be on the trailer bed whilst on

site should be protected from

falling from height in accordance

with “The Work At Height

Regulations”.

A lifting frame will normally be

provided to suit 4 planks and will

weigh approx 500kg, however if

required, a larger frame can be

provided (weighing approx. 750kg) to

lift 8 planks, in which case pallets need

to be placed adjacent to each other.

Overall depth of slab

55mm nominal bearing

Minimum bearing dimension

Agg +5mm

Picture courtesy of Carillion

Page 17: Structural Precast Products - Bison Precast Concreteforterra-precast.co.uk/.../Hanson_structural_precast_products.pdf · Product details 14 Manufacture 15 Delivery, offloading 16-17

17

Lifting Weights

ErectionHandling

Units must be lifted and placed

without jerking to prevent cracking to

the panel or damage to the lattice.

Always lift Omnia panels by the lattice

with the hooks positioned under the

diagonal.

Protection against falls

In line with the PFF Code of Practice,

the erection of Omnia units will be

subject to the application of a hierarchy

of safety systems as recommended by

the HSE. There are a range of

measures available from passive systems

such as working platforms, staging,

safety nets and air bags to active

systems such as work restraint/fall

arrest using safety harnesses.

Slab CompletionPlacing in position

Panels lifted in sets of 4 will be approx

1200mm wide (8 planks will be 2.40m

wide) and will need to be butted

together to close any gap between

them, minimising the risk of grout loss.

It is recommended that a method of

setting adjacent ‘sets’ be adopted so

that each set is placed at 1200mm

dimensions. This will keep the layout of

the planks close to that on the

drawing, the amount of gaps to a

minimum, and reduce the risk of any

cutting or make-ups due to creep.

Joint Grouting

Joints will need to be addressed to

prevent grout loss during concreting.

Various methods can be used, and we

would suggest a bead of sand/cement

grout towelled along all joints.

Placing of Reinforcement

Reinforcement will need to be placed

in accordance with the Structural

Engineers requirements and one layer

may need to be threaded through the

diagonals. Other layers are placed

between and over the lattice.

Concreting

The slab will then be concreted in

accordance with the Structural

Engineers specification.

Each plank weighs 36kg/m and each pallet will normally have 24 planks.

The pallet weight will need to calculated prior to uplifting from the vehicle,

and the layer weight of 4 (or 8) planks will need to be calculated before

lifting to the structure.

Pallet Weight

A pallet of 24 planks 3.60m will weigh:- 24 x 3.60m x 36kg/m = 3110kg

Use the calculator below...

………. Planks x …………. m x 36kg/m = ………kg

Layer Weight

A layer of 4 planks 3.20m long plus frame will be:-

4 x 3.20m x 36kg/m = 461kg plus 500kg frame = 960kg4 planks x ……… m x 36kg/m = ………… + 500kg = ……….

A layer of 8 planks 3.40m long plus frame will be:-

8 x 3.40m x 36kg/m = 979kg plus 750kg frame = 1729kg8 planks x ………. m x 36kg/m = …………. + 750kg = ……….

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PREFABRICATED WALLPANEL SYSTEMS

Hanson have developed a suite ofprefabricated panels which includeprecast concrete, masonry orcomposite panels of brick/block andconcrete with or without insulation.

These may be used for retaining walls,

parapets, bridge abutments, flood

defence systems or as both external

and internal walls for buildings

Where speed of construction and a

high quality finish are necessary,

Hanson's QuickBuildTM and FloodWallTM

products provide rapid installation of

finished masonry components.

Wall panels may consist of single leaf

masonry of clay brickwork, concrete

blockwork or natural stone, or a

composite precast concrete/masonry

construction. Wall lengths can vary

up to 9m.

18

Hanson QuickBuildTM

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QuickBuildTM/FloodwallTM BenefitsOff-site factory production

Consistent quality factory finishWall lengths up to 9m available Brickwork, blockwork or natural stone options

Enhanced strength characteristicsSheet piled or reinforced concrete structural wallWatertight constructionFull bricks or slips may be used Tried and tested materials

Saves time and money on siteVirtual elimination of formwork Reduced scaffolding requirementNo wet trades requiredNo down time due to inclement weather

Environmental benefitsSustainably produced, environmentally stable productReduced noise during constructionNo wet trades working adjacent to a watercourse

19

FloodwallTM

panel

Steel piles

Cavity wall panel – two skins of blockwork

Single leaf compositeconcrete and clay brickwork

Cavity wall panel - claybrickwork and blockwork

Insitu concrete

Concrete ground beam

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EXPERTISE AND CAPABILITIESBespoke Products

In addition to core product ranges

Hanson provides a comprehensive

design and manufacturing service,

supplying bespoke precast

concrete components to the civil

engineering sector, public utilities

and local authorities.

Hanson facilities include three sites in

the Midlands with the capability of

producing single component units up to

24 tonnes. These are at Derby,

Hoveringham and Cotes Park, Derbyshire.

Mould manufacturing, reinforcement,

cutting, bending and cage fabrication are

all generally completed in-house.

20

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Benefits of using precastconcrete solutions

Cost savings on site programmeFactory controlled processes; engineered products to recognised 3rd party quality assured standardsEfficiency of thermal massInherent fire protectionLow whole-life cost benefits

Typical bespoke structures

Bridge structures Deck slabsEdge beamsParapets etc

Marine & Sea Defence WorksFlood retaining walls etc

StadiaTerracesStaircasesDomitory wallsRaker beams etc

Railway SchemesPlatform unitsSpecialist culverts for jacking etc

Frame StructuresBeamsColumnsEdge beamsSpandrels etc

Bespoke specialist items Digester tanksTowers etc

21

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SERVICENationwide

22

All three sites – Hoveringham

(near Nottingham), Derby,

and Cotes Park in Derbyshire

– are directly involved in the

manufacture and supply of Box

Culverts, Omnia Bridge Deck

and Bespoke Products.

These central locations enable us

to provide a fast and efficient

service of structural precast

products to sites throughout the

country.

Standards

All products are manufactured in

accordance with relevant British/

European/Trade Association Standards.

All Hanson Building Products sites are

quality assured to BS EN ISO9001:2000

We operate environmental

management systems at all our

production sites in accordance with

the methodology set out in the

BS EN ISO14001:2004.

Other precast concrete products

Jetfloor

Beam and Block

Staircases

Hollowcore

Omnia products

For structural precast concretesolutions please contact us at:

Hanson Building Products

Birchwood Way

Cotes Park Industrial Estate

Alfreton, Derbys UK

Tel: 0870 609 7094

The Floors and Precast Division of Hanson Building Products nowoperates from a total of three dedicated plants located in the Midlands.

Hoveringham

Derby

Omnia Bridge Deck production

Somercotes

Hanson Building Products Floors and precast locations

Bespoke Structures and Box Culverts

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23

Hanson Quarry Products

Crushed rock

Sand and gravel

Asphalt

Contracting

Ready-mixed concrete

Ready-mixed mortar

Screed

Civil engineering

Hanson Cement

Pulverised fuel ash (PFA)

Bulk cement

Ground granulated blastfurnace slag (GGBS)

Packed products

Hanson Building Products

Bricks

Blocks

Precast concrete products

Permeable paving (SUDS)

Chimneys and roofing

Cladding

Off-site solutions

Specialist brick and block laying

StructhermFastbuild Cladding Render

Our companies and productsHanson UK is split into three business lines – Hanson QuarryProducts, Hanson Cement and Hanson Building Products. We alsooffer a range of contracting services. For detailed information on allareas of Hanson and our products visit: www.hanson.com/uk

ENVIRONMENTALMANAGEMENT

UKASQUALITY

MANAGEMENT

UKAS

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Floors and Precast Division

0870 6097094Hanson Building ProductsHanson House14 Castle HillMaidenheadSL6 4JJ

Website: www.hanson.com/uk

Hanson - A global business

Hanson is one of the world's largest suppliers of heavy buildingmaterials to the construction industry. We produce aggregates(crushed rock, sand and gravel), ready-mixed and precastconcrete, asphalt and cement-related materials and a range ofbuilding products including concrete pipes, concrete pavers, tiles and clay bricks

We are part of the HeidelbergCement Group, which employs70,000 people across five continents, has leading positions inconcrete and heavy building products and is the global leader in aggregates.

Hanson Building Products is the UK’s largest brick and aircreteblock producer. We also produce aggregate blocks, baggedaggregate and cement products, renders, pavers, pre cast floorsand stairs, SUD systems and prefabricated building systems.The division incorporates London Brick, Thermalite, Red Bank,Cradley, Formpave and Structherm.

Hanson Building Products - A sustainable business

Hanson Building Products is committed to being a sustainablebusiness and contributing to sustainable development. We achieve this by continuous improvement of ourmanufacturing and extraction processes and by providingproducts which contribute to sustainable construction.

Made at factories certified to ISO 14001, our clay and concreteproducts have many features which assist our customers inconstructing attractive, sustainable buildings which enrich thebuilt environment and are ideal for zero carbon developments.These include: thermal mass, insulation, longevity, durability, lowmaintenance, flexibility, flood resistance and the ability to berecycled. We can advise on how best to use our products insustainable buildings and how they contribute to high ratingsunder the Code for Sustainable Homes and BREEAM.

Email: [email protected]: www.hanson.com/uk/sustainability SP 01 | July 2010