I-Trac is heavy duty, professional grade temporary, modular portable roadway and event flooring designed to support extreme loads and equipment traffic on inhospitable, unsafe grounds. I-Trac offers an extreme strength to weight ratio when compare to the alternatives. I-Trac is a composite, interlocking panel system that creates a contiguous surface capable of dealing with all road going vehicles and static loadings, while it is easy to install and extract. I-Trac can be used in all weather conditions as it is molded with high-impact polypropylene with UV inhibitors preventing damage from long UV exposure. The purpose of this guide is to review all aspects in the safe usage of I-Trac panels.
Table of Contents
I-Trac is transported to job sites using 53’ and 48” enclosed trailers or 48’ flatbed trailers in the following volumes per trailer:
|53’ enclosed trailer||9,655.80 sq ft|
|48’ flatbed||9,655.80 sq ft|
I-Trac panels are shipped on pallets, 1 panel to a level. Each pallet has 19 panels per pallet. To prepare for shipping, the full pallet should be securely strapped to prevent any movement of panels on the pallet.
A trailer is loaded 2 strapped pallets high with each row strapped and winched in compliance with DOT Federal Motor Carrier Safety Regulation 49 CFR 393.100 – 393.114.
Pallets transported in closed trailers must be secured to ensure the load will not shift in transport.
Preliminary Subsurface Preparation
Before installing I-Trac, the load bearing properties of the subsurface to be covered must be evaluated to determine suitability for the loads placed on the I-Trac panels. The California Bearing Ratio (CBR) rating guidelines are used for this purpose. These guidelines and test method were developed in the 1930’s to determine the quality of soil where roads are to be constructed and are used to determine what is required of the roadbed.
CBR testing is a measurement of the pressure required to penetrate a soil sample with a standard plunger of a given area. CBR tests yield a % value that compares the surface being tested, to the load bearing capacity of well graded crushed California limestone. Well graded California limestone has a CBR value of 100. Samples can be evaluated on equipment in a lab or portable testing devices are available to perform field testing at the job site.
The formula for CBR is:
CBR = P/Ps (100)
P = measured pressure required to reach penetration depth of sight soil (lb/in sq) Ps = pressure to reach equal penetration in standard soil (lb/in sq)
The higher the CBR rating, the harder the surface and the greater the support under the I-Trac panels. Higher CBR ratings enable higher loads to be placed on the temporary roadbed system. The load capacity rating of I-Trac panels will vary with the CBR value for the subsurface.
Before installation the sight must be inspected and any large rocks or debris removed. Any large holes or indentations should be graded or filled in. If possible, CBR testing should be completed or estimates should be made using a sufficient safety factor. Soil conditions may vary over the installation area, so care must be taken to evaluate the total area to be covered. It is the responsibility of the installer to ensure the surface is capable of supporting the loads required and does not have any large holes or irregularities that will affect the structural integrity of the I-Trac panel installation.
The I-Trac compression load capacity will vary depending on the CBR value of the subsurface of the I-Trac roadway. The graph below charts the compression load capacity of I-Trac panels at CBR values from 0 to 100. The use of geotextile will increase the subsurface CBR rating and additional layers of I-Trac panels increase the load capacity of the I-Trac roadway. Use of geotextile creates a barrier between dirt and the roadway keeping panels cleaner as well as limiting water build up at low areas under the installation.
The following graph illustrates the range of I-Trac static compression capacity per square foot of installation at subsurface CBR ratings from 0 to 100.
The following chart provides guidelines for I-Trac static load capacity on different types of surfaces with estimated CBR ground conditions. These guideline are estimates. The most effective way to determine accurate CBR ratings is to have subsurfaces tested in a lab or to purchase a portable CBR testing device to take multiple measurements over the total area of the surface where the I-Trac panels will be deployed.
|I-TracLoad CapacityLbs / sq ft*||I-TracLoad CapacityLbs / sq in*||CBR ValuesDifferent Subsurface Types|
|90,000||625||100 – California Graded Crushed Limestone|
|76,500||531||50 – Firm Sub-Surface|
|63,000||437||30 – Sandy Soil|
|45,000||312||20 – Clay Soil|
|28750||200||10 – Wet / Muddy Sub-Surface|
|0||0||0 – Unsupported|
* Values calculated using physical compression figures obtained between:
CBR 0 (unsupported) and CBR 100 (fully supported steel sub-frame)
Assembly instructions for the original I-Trac panel and the latest version with a replaceable pin.
All parts are field replaceable with a hard rubber mallet and can be removed with a screw driver.
I-Trac can be cleaned using a high-pressure spray washer. High-pressure steam cleaners should never be used.
If an I-Trac panel weld seem between the panel is separated, the panel must be recycled. The pin body, pin, peg and cam can all be replaced if damaged.
For information on recycling damaged or worn-out I-Trac panels, visithttp://www.macroplastics.com/services/recycling/.