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# Hook Time Analysis

4 replies [Last post]
Andrew Owenson
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Joined: 18 Jun 2008
Posts: 65
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Planners

I am trying to carry out a hook time analysis on a insitu concrete frame. We are trying to establish which subcontractor is more realistic, one is saying 3 cranes the other four. Has anyone got a worked example of a similar exercise?

Many Regards

Andrew

## Replies

Mike Testro
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Joined: 14 Dec 2005
Posts: 4407

Hi Derrick

This is my own formula which is used in conjunction with Asta PowerProject.

Once you have researched the variables for the specified crane then the result is used as a resource added to tasks requiring crane use.

The Histogram will need to be levelled when the total hooks per day is known.

Best regards

Mike Testro

Best regards

Mike T.

Derrick Anim
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Joined: 20 Apr 2017
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Dear Sir, i am a beginner and i want to know how u came about this analysis and it importance?

Umer Mehmood
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Joined: 19 Jun 2008
Posts: 25

Dear all

I am just a beginner  , can any one advise me what " Hook Time " Means  " Hooks per Day "

Thank you

Mike Testro
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Joined: 14 Dec 2005
Posts: 4407

Hi Andrew

This topic is part of module 9 in the Advanced Planning set in Planning Acaemy tuition modules.

The following sections are the basic formulas for a 4 story concrete frame with brick cladding.

DO NOT USE these examples for your project - do your own research into the variables.

The calculations need a programme resource on your barchart called hooks which is applied to all tasks that need crane use - don't forget the formwork tables which all need hook time.

Part 1 Crane Capacity:

 Luffing Crane Typical Capacity for a Small Crane Max Load 5 tonne Min Load 1.5 tonne Operation Time Sling Up 5 mins Hoist 4 mins up Discharge 3 mins Hoist 2 mins down Cycle 14 mins Hoist per Hr 4 Work hrs per day 6 Hooks per day 24

Part 2 Crane Usage

 Code Tower Crane Usage Days Hooks xx Tower Crane Erect xx 3 Column Rebar 3 1 1 Column Pour 1 28 4 Slab Rebar 3 4 2 Pour Slab 1 0 3 Column Rebar 3 1 5 Strike Forms 2 4 1 Column Pour 1 28 5 Slab Forms 3 4 4 Slab Rebar 3 4 2 Pour Slab 1 0 3 Column Rebar 3 1 5 Strike Forms 2 4 7 Internal Blockwork L0 5 1 6 External Brick Work Lift 01 8 1 1 Column Pour 1 28 5 Slab Forms 3 4 6 External Brick Work Lift 02 8 1 4 Slab Rebar 3 4 2 Pour Slab 1 0 3 Column Rebar 3 1 5 Strike Forms 2 4 7 Internal Blockwork L1 8 1 6 External Brick Work Lift 03 8 1 9 Load Out L1 2 4 1 Column Pour 1 28 5 Slab Forms 3 4 7 External Brick Work Lift 04 8 1 4 Slab Rebar 3 4 2 Pour Slab 1 0 3 Column Rebar 3 1 9 Load Out L2 2 4 7 Internal Blockwork L2 8 1 1 Column Pour 1 28 6 External Brick Work Lift 05 8 1 5 Slab Forms 3 4 4 Slab Rebar 3 4 6 External Brick Work Lift 06 8 1 2 Pour Slab 1 0 5 Strike Forms 2 4 7 Internal Blockwork L3 8 1 9 Load Out L3 2 4 6 External Brick Work Lift 07 8 1 8 Install Roof Plant 5 1 6 External Brick Work Lift 08 8 1 7 Internal Blockwork L4 8 1 7 External Brick Work Lift 09 8 1 9 Load Out L4 2 4 6 External Brick Work Lift 10 8 1 6 External Brick Work Parapet 4 1

Part 3 Hook Numbers

 Code Material Type Volume Container Capacity Hooks Programme Tasks Hooks per Use Work Days Hooks Per day 1 Concrete in Columns 110 m3 Skip 0.8 138 5 28 1 28 2 Concrete in Slabs 522 m3 Skip 0.8 653 5 131 1 131 <<<< Pump 3 Rebar in Columns 14 tonne Sling 1.2 12 5 3 3 1 4 Rebar in Slabs 69 tonne Sling 1.2 58 5 12 3 4 5 Table Forms 75 unit unit 1 75 8 10 3 4 6 External Brick m2 42750 nr pallettes 624 69 9 8 8 1 7 Internal Block 2640 nr palletes 80 33 7 5 8 1 8 Roof Plant 5 units unit 1 5 1 5 5 1 9 Internal Heavy 30 units unit 1 30 4 8 2 4

This requires 1 luffing jib crane use a factor for more than one crane to adjust the hooks per hour ratio per day.

Best regards

Mike Testro