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Importance of Site Visit Prior
to Design
Stainton Lighting Design Services Ltd
Kevin Hill
Junior Lighting Designer
My Background
• School into college
• Started an apprenticeship at SLDS
• Office based lighting designer
• Developing experience in civils or installation
A19 Easington Stockton Road
• Traffic route
• Full new scheme
• Everything done to current
standards in terms of passive
columns and barrier working
widths
• We were awaiting TOPO but
needed to start or you may not
get TOPO
• First approach (outline positions
at max spacings)
Site Visit
• Google maps
• Plans with proposed locations
• Without site visit some problems may not of been identified
• Maybe identified further down the line
• Doubling back or starting again
• Scheme hitting the ground then finding the problems
Existing Signs
Overhead Lines
Immoveable Objects
Changes to Design
• Fixed Location items affecting design
• Overhead lines
• Bridge decks
• Walls
• Start and end of the scheme
• Instead of max spacings we are now taking average between these
fixed positions
Safety Barrier
• Why are the barriers
there?
• What do they do?
• Working width of barrier
• Setback from 2m to
3m+
Common Barrier Types
• OBB (Open box beam)
• TCB (Tension corrugated barrier)
Barrier Standards Requirements
• CD377 (Requirements for road restraint systems) was TD19/06
• BSEN1317-2 (Compliant Road Restraint Systems)
Type Containment
Level
Post Spacings Value used
after June 2005
TCB (single
sided)
N2 3.2
1.6
W6
W5
OBB (single
sided)
N2 2.4
1.2
W5
W4
Working width up to
but not exceeding
Class of working
width level
0.6 W1
0.8 W2
1.0 W3
1.3 W4
1.7 W5
2.1 W6
2.5 W7
3.5 W8
Safety barrier
containment level
(Minimum “full
height” lengths of
safety barrier) In
advance of hazard
(Minimum “full
height” lengths of
safety barrier)
Beyond hazard
Normal (N2 or N2) 30m 7.5m
Higher (H1 or H2) 30m 10.5m
Very high (H4a) 45m 18m
Embankments
• Google view
• Civils issue on top of lighting
design issue
• Can you avoid it?
• Weigh up stronger barrier vs
planting on embankment
(buildability and costs)
Embankments
Bridge Decks
• Flange bolts and foundation not
guaranteed life
• Columns in front of VRS
• 18m columns (12m nominal
height
Thanks For Listening

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ILP Durham CPD: Why a site visit is important on a traffic route

  • 1. Importance of Site Visit Prior to Design Stainton Lighting Design Services Ltd Kevin Hill Junior Lighting Designer
  • 2. My Background • School into college • Started an apprenticeship at SLDS • Office based lighting designer • Developing experience in civils or installation
  • 3. A19 Easington Stockton Road • Traffic route • Full new scheme • Everything done to current standards in terms of passive columns and barrier working widths • We were awaiting TOPO but needed to start or you may not get TOPO • First approach (outline positions at max spacings)
  • 4. Site Visit • Google maps • Plans with proposed locations • Without site visit some problems may not of been identified • Maybe identified further down the line • Doubling back or starting again • Scheme hitting the ground then finding the problems
  • 8. Changes to Design • Fixed Location items affecting design • Overhead lines • Bridge decks • Walls • Start and end of the scheme • Instead of max spacings we are now taking average between these fixed positions
  • 9. Safety Barrier • Why are the barriers there? • What do they do? • Working width of barrier • Setback from 2m to 3m+
  • 10. Common Barrier Types • OBB (Open box beam) • TCB (Tension corrugated barrier)
  • 11. Barrier Standards Requirements • CD377 (Requirements for road restraint systems) was TD19/06 • BSEN1317-2 (Compliant Road Restraint Systems) Type Containment Level Post Spacings Value used after June 2005 TCB (single sided) N2 3.2 1.6 W6 W5 OBB (single sided) N2 2.4 1.2 W5 W4 Working width up to but not exceeding Class of working width level 0.6 W1 0.8 W2 1.0 W3 1.3 W4 1.7 W5 2.1 W6 2.5 W7 3.5 W8 Safety barrier containment level (Minimum “full height” lengths of safety barrier) In advance of hazard (Minimum “full height” lengths of safety barrier) Beyond hazard Normal (N2 or N2) 30m 7.5m Higher (H1 or H2) 30m 10.5m Very high (H4a) 45m 18m
  • 12. Embankments • Google view • Civils issue on top of lighting design issue • Can you avoid it? • Weigh up stronger barrier vs planting on embankment (buildability and costs)
  • 14. Bridge Decks • Flange bolts and foundation not guaranteed life • Columns in front of VRS • 18m columns (12m nominal height