Technical Bulletin

4
FRTR01--WW-ENG
Property of Panduit – 6/1/2011
Wyr-Grid® Cable Tray Load Rating Report
Table 1 outlines the Safe Working Load for each size of Wyr-Grid® Cable Tray based on internal testing. The SWL
ratings in the table apply for Wyr-Grid® Cable Tray installed in any of the following configurations:
• Cable Tray only (no splices, see Figure 1)
• Straight splice (see Figure 5)
• Cross (see Figure 6) and T Intersections (see Figure 7)
Panduit Part # Tray
Width
Safe Working Load (lbs/ft)
4’
Support
Span
5’
Support
Span
6’
Support
Span
7’
Support
Span
8’
Support
Span
9’
Support
Span
WG12**10 12” 113 90 69 54 43 34
WG18**10 18” 115 90 67 52 41 31
WG24**10 24” 116 92 69 54 53 33
WG30**10 30” 116 92 69 54 53 33
Table 1: Safe Working Loads for Wyr-Grid® Cable Tray
Splices for straight section of cable tray should be positioned no more than 1/5
th
of the support span away from a
support to maintain the SWL of the cable tray, as shown in Figure 5. The 12” and 18” wide Wyr-Grid® Cable Trays
utilize the WG1218SPL** splice kit, which consists of two side splices. The 24” and 30” wide Wyr-Grid® Cable Trays
utilize the WG2430SPL** splice kit, which consists of two side splices and two center splices.
Figure 5: Splice Location in Relation to Supports, Side View
L/5 = Recommended maximum distance of splice to support
L/5
L
L
Splice