1

Tarmac Precast Concrete LimitedTallingtonStamfordLincolnshirePE9 4RL

t 01778 381000f 01778 348041e precastenquiries@tarmac.co.uk

www.tarmacprecast.co.uk

Tarmac Precast Concrete – product overview

Tarmac and the ‘T’ mark are registered trademarks of the Tarmac Group.

Although Tarmac Limited does its best to ensure that any advice, recommendations or information it may give is accurate, no liability or responsibility of any kind (including liability for

negligence) is accepted in this respect by Tarmac Limited, its staff or agents. Claims and statements made by Tarmac Limited regarding its products refer to those which have been properly

handled on site. Tarmac Limited cannot accept any liability or responsibility of any kind (including liability for negligence) for problems caused by the acts or omissions of third parties or

by poor site practices.

For additional information on Tarmac’s precast products please contact us on the number below.

Other technical information for each individual precastunit is available for the following products:

box culverts

Charcon tunnels

double tee beams

retaining walls and barriers

thermocast

Literature covering our full range of products for specific industry sectors is available on request.

commercial

energy

rail

road

sport and leisure

water

prestressed beams

0251 / 806

product specifications

Tarmac prestressed concrete beams can be used to form bridge decks with bearings and expansion joints as well as integral bridges.

Integral bridges, which bear directly onto their abutments and against the soil on each side, without bearings or joints,are now a modern, economical option.

Prestressed concrete beams can be used conveniently in the construction of elevated decks, podia, jetties and in formingslabs to cover shafts and other excavated voids.

This brochure contains an overview of the technical specifications for our full range of standard bridge beamswith further technical information contained on a CD on the inside back cover.

further technical informationOn the attached CD you will find the followingsupplementary technicalinformation:

Beam section properties

Strand layout

Detailing advice

Installation advice

typical applications:Short and medium span bridges andcommercial developments.

advantages:Provides a closely assembled soffit. No need for formwork.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

T Beamprofile span range (in metres)

2

typical applications:Short and medium span bridges, commercial developments, jetties and marine decks.

advantages:Provides a closely assembled soffit withlower number of beams required and lessinsitu concrete. No need for formwork.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TY Beamprofile span range (in metres)

typical applications:Complementary edge beam to the ‘TY’ beam.

advantages:Can be used for a solid infill deck.Increased section properties to supportparapet loading.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TYE Beam profile span range (in metres)

Solid Slab Decks

Solid slab bridges are the most economical solution

for short spans, up to 18m.

The beams are laid side by side, bottom steel

is placed transversely through specially cast holes

in the beam and a top mat of steel is then fitted.

The deck is then completed with a pour of

insitu concrete. TY beamDECK SECTION

bridge designer’s checklist

BearingsAs a general rule the edge of the bearing closest to the abutment should be detailed a minimum of 150mm from the end of the beam.

CamberDue to the properties of prestressed concrete units upward camber will be present. As our standard beams are cast on flatbases built in cambers cannot normally be accommodated.

Cast in itemsCast in items can be included providing that they do not project through the sides or soffit of our standard mouldage. Care should be taken to ensure that any cast in items do notconflict with reinforcement or prestressing of strand locations.

ConcreteThe use of cementitious materials other than RHPC may require a longer curing period prior to detensioning and therefore are to be avoided. Our standard concrete mixes have been designedto attain a transfer strength of 40N/mm2 and a 28 day strengthof 60N/mm2. Other concrete strengths can be considered.

EndsSkews up to 450 can normally be incorporated within our standard manufacturing procedures. The acute corner will be blocked out above 240 to avoid the risk of spalling.

At the beam ends chamfers are provided across the soffit to prevent spalling on detensioning. Scarfed ends and solid end blocks should be avoided where possible. Where dowel slots are specified account should be taken of the implications of reinforcement and cover detailing.

FinishesTop finish will be as cast with the side and soffit finishes to the DTp Highway Specification or BS 5400. Colour variationsbetween units may occur and also between our units and any site insitu works.

LiftingOur standard lifting methods are as detailed on the attached CD.

LengthsThe overall length after transfer should be specified. Small variations in length should be avoided.

The following design notes are offered for guidance purposes andreflect our standard manufacturing techniques. Should you have otherrequirements our technical department will be pleased to offer advice.

Quality AssuranceTarmac Precast Concrete is a BSI Registered Company. The QualitySystem fully complies with the requirements of BS EN ISO 9001:2000.

ReinforcementLinks are tied to the prestressing strand using stainless steel tying wire as standard. Links must be dimensioned to take account of strand positions and link diameters when considering cover requirements. For skewed beams links should be detailed square to the beam centreline and skewed only at the beam ends. Two piece links of different diameters and/or centres should be avoided.

To avoid displacement of reinforcement in complex cages during castingit may be necessary to use tack welding. Reinforcement projectingthrough the sides and soffit should be avoided and reinforcement couplers should be considered as an alternative. Reinforcement projecting from the beam end should be straight where possible. Special stop ends/couplers may be provided to accommodate a bob on the projecting bar.

Stacking BearersStacking bearers are generally located at lifting positions or 500mmfrom beam end.

StrandOur preferred strand sizes and types are indicated on the design drawings on the attached CD. Standard strand positions are as shown on the attached CD and debonding techniques can be used.

TestingOur high standards of quality control make routine load testing unnecessary.

TolerancesTolerances should be to either DTp Highways Specification or BS 5400.

Web OpeningsWeb holes are provided at 900 to the beam sides for both square and skewed beam ends at centres as given on the attached CD for all beam types. The centres of the end web holes should be at least400mm from the beam end to avoid the risk of horizontal splitting.

WeightThe weight of the beams used for handling and erection purposes is that indicated on the design drawings on the attached CD.

9

8

Well first, it's renowned for its strength,durability and versatility.

Then there are the significant cost savings -precast concrete reduces initial constructioncosts, accelerates build programmes andrequires lower levels of maintenance over a project's life.

Precast concrete units are also quick andeasy to install, minimising on-site labourtime, and because there's no need to wait for the concrete to cure allow you to progress to the next stages immediately.

why useprecast concrete

1. Lowest whole-life cost

2. Fast and efficient build

3. Factory quality with engineered tolerances

4. Low maintenance

5. Long spans

6. Strong and durable

7. Low noise transmission

8. Environmentally friendly

9. Built-in fire protection

10. Efficiency of thermal mass

ten good reasons forusing precast concrete:

3

typical applications:Ideal for short span bridges and commercial developments.

advantages:Provides a closely assembled soffit and less insitu concrete. No need forformwork. Can be readily designed for continuity.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

SBB Beam (Standard Bridge Beam)

profile span range (in metres)

typical applications:Short to long span bridges. Ideal foruse over busy railway lines.

advantages:Provides a quick, safe working platform.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

Solid Box Beam profile span range (in metres)

Solid Slab Decks (cont.)

7

7

technical servicesTarmac can provide a full range of technical services including: Advice on TAI Certificate content

Deck analysis and design including beam design and detailing

Beam design and detailing from clients analysis output

Advice on installation

Arrangement for provision of Category 1, 2 or 3 checks

1

typical applications:Medium and long span bridges.

advantages:Suitable for skew decks where torsionis high. Provides a ready made edgedetail and easy provision for services.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

U Beamprofile span range (in metres)

the leading UK manufacturer of precast concrete offering our customers a unique packageof benefits

Voided Slab Decks

A voided slab deck is useful where service decks

are required and in situations with very high skews.

4

U beam with rebateDECK SECTION

5 6

Beam & Slab Decks

Beam and slab bridges are economical from 18m to 40m.

The beams are parallel spaced at 2.0m centres

(depending on layout) and a top deck or end diaphragm

is cast insitu to connect them.

typical applications:Short and medium span bridges and commercial developments.

advantages:The beams are spaced apart,facilitating easy access to the underside of the structure.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TY Beam with rebateprofile span range (in metres)

typical applications:Complementary edge beam to the ‘TY’ beam.

advantages:Can be used for beam and slab construction. Increased section properties to support parapet loading.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TYE Beam with rebateprofile span range (in metres)

typical applications:Complementary edge beamto the ‘M’ beam.

advantages:Provides a clean vertical facewith a variety of finishes along with a channel void for incorporation of services.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

UM Beam profile span range (in metres)

typical applications:Longer spans. Major motorwayschemes.

advantages:Provides a practical and economicalsolution for spans up to 40 metres.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

SY Beamprofile span range (in metres)

typical applications:Provides voided bridge deck for medium and long span road bridge construction.

advantages:Closed soffit to underside ideal forpseudo-box type construction.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

M Beam profile span range (in metres)

typical applications:Complementary edge beam to the ‘Y’ beam.

advantages:Can be used for either a solid infilldeck or beam and slab construction.Increased section properties to supportparapet loading.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

YE Beam profile span range (in metres)

typical applications:Medium and long span bridges and commercial developments.

advantages:The beams are spaced apart,facilitating easy access to the underside of the structure.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

Y Beamprofile span range (in metres)

Beam & Slab Decks (cont.)

TY beam with rebateDECK SECTION

TYE beam with rebateDECK SECTION

5 6

Beam & Slab Decks

Beam and slab bridges are economical from 18m to 40m.

The beams are parallel spaced at 2.0m centres

(depending on layout) and a top deck or end diaphragm

is cast insitu to connect them.

typical applications:Short and medium span bridges and commercial developments.

advantages:The beams are spaced apart,facilitating easy access to the underside of the structure.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TY Beam with rebateprofile span range (in metres)

typical applications:Complementary edge beam to the ‘TY’ beam.

advantages:Can be used for beam and slab construction. Increased section properties to support parapet loading.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TYE Beam with rebateprofile span range (in metres)

typical applications:Complementary edge beamto the ‘M’ beam.

advantages:Provides a clean vertical facewith a variety of finishes along with a channel void for incorporation of services.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

UM Beam profile span range (in metres)

typical applications:Longer spans. Major motorwayschemes.

advantages:Provides a practical and economicalsolution for spans up to 40 metres.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

SY Beamprofile span range (in metres)

typical applications:Provides voided bridge deck for medium and long span road bridge construction.

advantages:Closed soffit to underside ideal forpseudo-box type construction.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

M Beam profile span range (in metres)

typical applications:Complementary edge beam to the ‘Y’ beam.

advantages:Can be used for either a solid infilldeck or beam and slab construction.Increased section properties to supportparapet loading.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

YE Beam profile span range (in metres)

typical applications:Medium and long span bridges and commercial developments.

advantages:The beams are spaced apart,facilitating easy access to the underside of the structure.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

Y Beamprofile span range (in metres)

Beam & Slab Decks (cont.)

TY beam with rebateDECK SECTION

TYE beam with rebateDECK SECTION

7

technical servicesTarmac can provide a full range of technical services including: Advice on TAI Certificate content

Deck analysis and design including beam design and detailing

Beam design and detailing from clients analysis output

Advice on installation

Arrangement for provision of Category 1, 2 or 3 checks

1

typical applications:Medium and long span bridges.

advantages:Suitable for skew decks where torsionis high. Provides a ready made edgedetail and easy provision for services.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

U Beamprofile span range (in metres)

the leading UK manufacturer of precast concrete offering our customers a unique packageof benefits

Voided Slab Decks

A voided slab deck is useful where service decks

are required and in situations with very high skews.

4

U beam with rebateDECK SECTION

8

Well first, it's renowned for its strength,durability and versatility.

Then there are the significant cost savings -precast concrete reduces initial constructioncosts, accelerates build programmes andrequires lower levels of maintenance over a project's life.

Precast concrete units are also quick andeasy to install, minimising on-site labourtime, and because there's no need to wait for the concrete to cure allow you to progress to the next stages immediately.

why useprecast concrete

1. Lowest whole-life cost

2. Fast and efficient build

3. Factory quality with engineered tolerances

4. Low maintenance

5. Long spans

6. Strong and durable

7. Low noise transmission

8. Environmentally friendly

9. Built-in fire protection

10. Efficiency of thermal mass

ten good reasons forusing precast concrete:

3

typical applications:Ideal for short span bridges and commercial developments.

advantages:Provides a closely assembled soffit and less insitu concrete. No need forformwork. Can be readily designed for continuity.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

SBB Beam (Standard Bridge Beam)

profile span range (in metres)

typical applications:Short to long span bridges. Ideal foruse over busy railway lines.

advantages:Provides a quick, safe working platform.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

Solid Box Beam profile span range (in metres)

Solid Slab Decks (cont.)

7

typical applications:Short and medium span bridges andcommercial developments.

advantages:Provides a closely assembled soffit. No need for formwork.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

T Beamprofile span range (in metres)

2

typical applications:Short and medium span bridges, commercial developments, jetties and marine decks.

advantages:Provides a closely assembled soffit withlower number of beams required and lessinsitu concrete. No need for formwork.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TY Beamprofile span range (in metres)

typical applications:Complementary edge beam to the ‘TY’ beam.

advantages:Can be used for a solid infill deck.Increased section properties to supportparapet loading.

2 4 6 8 10 12 14 16 18 20 22 24 26 28 30 32 34 36 38 40

TYE Beam profile span range (in metres)

Solid Slab Decks

Solid slab bridges are the most economical solution

for short spans, up to 18m.

The beams are laid side by side, bottom steel

is placed transversely through specially cast holes

in the beam and a top mat of steel is then fitted.

The deck is then completed with a pour of

insitu concrete. TY beamDECK SECTION

bridge designer’s checklist

BearingsAs a general rule the edge of the bearing closest to the abutment should be detailed a minimum of 150mm from the end of the beam.

CamberDue to the properties of prestressed concrete units upward camber will be present. As our standard beams are cast on flatbases built in cambers cannot normally be accommodated.

Cast in itemsCast in items can be included providing that they do not project through the sides or soffit of our standard mouldage. Care should be taken to ensure that any cast in items do notconflict with reinforcement or prestressing of strand locations.

ConcreteThe use of cementitious materials other than RHPC may require a longer curing period prior to detensioning and therefore are to be avoided. Our standard concrete mixes have been designedto attain a transfer strength of 40N/mm2 and a 28 day strengthof 60N/mm2. Other concrete strengths can be considered.

EndsSkews up to 450 can normally be incorporated within our standard manufacturing procedures. The acute corner will be blocked out above 240 to avoid the risk of spalling.

At the beam ends chamfers are provided across the soffit to prevent spalling on detensioning. Scarfed ends and solid end blocks should be avoided where possible. Where dowel slots are specified account should be taken of the implications of reinforcement and cover detailing.

FinishesTop finish will be as cast with the side and soffit finishes to the DTp Highway Specification or BS 5400. Colour variationsbetween units may occur and also between our units and any site insitu works.

LiftingOur standard lifting methods are as detailed on the attached CD.

LengthsThe overall length after transfer should be specified. Small variations in length should be avoided.

The following design notes are offered for guidance purposes andreflect our standard manufacturing techniques. Should you have otherrequirements our technical department will be pleased to offer advice.

Quality AssuranceTarmac Precast Concrete is a BSI Registered Company. The QualitySystem fully complies with the requirements of BS EN ISO 9001:2000.

ReinforcementLinks are tied to the prestressing strand using stainless steel tying wire as standard. Links must be dimensioned to take account of strand positions and link diameters when considering cover requirements. For skewed beams links should be detailed square to the beam centreline and skewed only at the beam ends. Two piece links of different diameters and/or centres should be avoided.

To avoid displacement of reinforcement in complex cages during castingit may be necessary to use tack welding. Reinforcement projectingthrough the sides and soffit should be avoided and reinforcement couplers should be considered as an alternative. Reinforcement projecting from the beam end should be straight where possible. Special stop ends/couplers may be provided to accommodate a bob on the projecting bar.

Stacking BearersStacking bearers are generally located at lifting positions or 500mmfrom beam end.

StrandOur preferred strand sizes and types are indicated on the design drawings on the attached CD. Standard strand positions are as shown on the attached CD and debonding techniques can be used.

TestingOur high standards of quality control make routine load testing unnecessary.

TolerancesTolerances should be to either DTp Highways Specification or BS 5400.

Web OpeningsWeb holes are provided at 900 to the beam sides for both square and skewed beam ends at centres as given on the attached CD for all beam types. The centres of the end web holes should be at least400mm from the beam end to avoid the risk of horizontal splitting.

WeightThe weight of the beams used for handling and erection purposes is that indicated on the design drawings on the attached CD.

9

product specifications

Tarmac prestressed concrete beams can be used to form bridge decks with bearings and expansion joints as well as integral bridges.

Integral bridges, which bear directly onto their abutments and against the soil on each side, without bearings or joints,are now a modern, economical option.

Prestressed concrete beams can be used conveniently in the construction of elevated decks, podia, jetties and in formingslabs to cover shafts and other excavated voids.

This brochure contains an overview of the technical specifications for our full range of standard bridge beamswith further technical information contained on a CD on the inside back cover.

further technical informationOn the attached CD you will find the followingsupplementary technicalinformation:

Beam section properties

Strand layout

Detailing advice

Installation advice

1

Tarmac Precast Concrete LimitedTallingtonStamfordLincolnshirePE9 4RL

t 01778 381000f 01778 348041e precastenquiries@tarmac.co.uk

www.tarmacprecast.co.uk

Tarmac Precast Concrete – product overview

Tarmac and the ‘T’ mark are registered trademarks of the Tarmac Group.

Although Tarmac Limited does its best to ensure that any advice, recommendations or information it may give is accurate, no liability or responsibility of any kind (including liability for

negligence) is accepted in this respect by Tarmac Limited, its staff or agents. Claims and statements made by Tarmac Limited regarding its products refer to those which have been properly

handled on site. Tarmac Limited cannot accept any liability or responsibility of any kind (including liability for negligence) for problems caused by the acts or omissions of third parties or

by poor site practices.

For additional information on Tarmac’s precast products please contact us on the number below.

Other technical information for each individual precastunit is available for the following products:

box culverts

Charcon tunnels

double tee beams

retaining walls and barriers

thermocast

Literature covering our full range of products for specific industry sectors is available on request.

commercial

energy

rail

road

sport and leisure

water

prestressed beams

0251 / 806