PowerPoint Presentation

Jack & Slide Systems

Presented by Jeremy LandryDeep South Crane & Rigging

Introduction

What is a Jack and Slide:

AKA Jack and Roll

Jack object up

Insert slide mechanism under

Move to desired location

When to use the Jack and Slide Method:

Obstruction prevents object from being lifted with a crane

Object is enclosed in a structure

Moving an object under obstacles

More economical

Examples of Jack and Slide:

Moving machinery inside buildings

Sliding loads under piperacks or other obstructions

Sliding loads off railcars/trucks

Moving objects from congested areas

Every jack and slide job is different:

Hours of engineering and planning

Require creativity and ingenuity

How to get J&S equipment to worksite

Jacking

Jacking Process:

Goal = jack object to needed height to insert slide systemStair stepUse cribbingCrisscross cribbing for stability

Types of Cribbing:

Variety of different thicknessesPlywood4x4 ; 8x8 ; 12x12 Small steel plates distribute load on cribbingManageable to be carried by handHigh capacity Ekki Wood Timbers

Need a device to facilitate the jacking portionNeed a power source (hydraulic)

Enerpac Jacks have multiple styles and models to accommodate jacking needs

Toe Jacks: Get under low equipment 1 minimum ground clearance Lifting points on both the toe and top

Gantry System:

Pick objects off SPMT or foundationSet onto slide system

Sliding

Three types of Slide

Air Castors

Rollers

Slide System

When choosing what slide system to use, consider this:

Confines of the jobsiteWeight of object being movedGround conditionsDirections of travel

Air Bags / Air Castors

Air bags / Air Castors:

Used for light load inside shopsTakes only one or two people to move loadsMulti directionalFloats on thin layer of air

Limits:Light capacityLevelness: over 10Flatness: over 10Smoothness: Machined concrete floor or vinyl tile30 to 40 psiNeeds high volume of airConsult operator manual for air requirements vs. weight of load

www.youtube.com/watch?v=fEtZn3YrEEQ

Rollers

Rotating Caster Skates:

Low capacity Multi directionalUrethane roller = no floor damage

Hilman Rollers are typically use for heavy loads/heavy duty applications

Roller selection depends on application & job site conditions

High capacity rollers are more cumbersome to maneuver

When using rollers:

Always be sure to have a hold back system in placeUse wedges in front of roller travel direction as another safety precautionAlways make sure ground/structural steel can support loadsAlways choose the points on the load that will give the best distribution (corners)Align rollers parallelAvoid metal to metal on top of roller (wood/pad)

Skid System

Basics of a Skid System:Skid trackSkid shoeHydraulic cylinder

Teflon wear padsOvercome frictional forceSaddle pockets if needed

Jack up objectLay foundation for skid trackLay skid trackInsert skid shoes/cylindersHook up power packLower object onto skid shoesStart skidding processAlways keep a point of contact as for safety

www.youtube.com/watch?v=DMlh3NNrCxU

Case Study #1

Compressor Jack & Slide

Scope of Work:Jack compressor skid up on trailerInsert channel iron and roller under loadSkid to foundation and lower

Jacking the skid up on the trailer and inserting channel iron and rollers

Used squat cans to bridge the gap between truck and support steelWedges used as safety stop for roller

Come along to facilitate the slideSpecial jacking lugs were fabricated to fit on lifting lugs of skid to use as jack pointsLower skid onto foundation

Skid lower onto foundation

Case Study #2Flue Gas Cooler Elevated Jack & Slide

Scope of work:Jack and slide Flue Gas Cooler out of an elevated structureRemove with craneInsert new one back in place

Assembled gantry systemFabricated and attached jacking lugsJack cooler to required height to insert ramp and rollers

Slide ramp under coolerPre welded channel iron and snatch block

Crane hoisted to facilitate slideUsed wedges as safety stops

Removed old coolerInserted new one

Tips

Inspect equipment before each useAlways be sure to have a hold back system in placeIf using rollers, wedges work well for stopping loadsAlways make sure ground/structural steel can support loadsSlow and Steady wins the race!Jacking lugs can be fabricated if there are no jacking pointsWant slide to be as level and smooth as possibleChannel iron/I-Beams work well with rollersIf using air castors, seal cracks in floor with tape (refrigerator tape). Also, lay vinyl over ridges for smooth transitionsLubricate skid trackCreativity and Ingenuity are key on Jack and Slide projectsWhen you think you have enough cribbing, better grab some more.

Special Thanks to these vendors:

Be sure to visit them at the Products Show

Questions?