Table of Contents
Advertisement
When using non-track fixtures mounted with DataTrack Backbone fixture hangers (see
page 58
on
) on DataTrack Backbone, the rated load is dependent on the span. Use the table below to
determine rated load and deflection for a given span. For point loads (where the load is applied at a
single point in the center of a span), multiply the load by two when determining the total load.
Fixture centers
Span
Maximum allowable load*
2 ft (.6 m)
3 ft (.9 m)
4 ft (1.2 m)
5 ft (1.5 m)
6 ft (1.8 m)
7 ft (2.1 m)
8 ft (2.4 m)
9 ft (2.7 m)
10 ft (3.1 m)
> 10 ft (3.1 m)
Calculations are based on a distance between fixture centers of18 in (46 cm).
* Maximum allowable single-point load is half the maximum allowable load over a given span.
† Weight limited by clamp capacity
Figure 7: DataTrack Backbone suspended load capacity for non-track fixtures
Planning
Fixture weight
300 lb (136 kg)
300 lb (136 kg)
300 lb (136 kg)
280 lb (127 kg)
260 lb (118 kg)
240 lb (109 kg)
220 lb (100 kg)
200 lb (91 kg)
190 lb (86 kg)
Span
Fixture weight
100 lb (45 kg)†
100 lb (45 kg)†
100 lb (45 kg)†
100 lb (45 kg)†
100 lb (45 kg)†
75 lb (34 kg)
50 lb (23 kg)
40 lb (18 kg)
35 lb (16 kg)
Not recommended
Fixture Hanger
Maximum deflection
at center
< 0.05 in (0.1 cm)
< 0.05 in (0.1 cm)
0.075 in (0.2 cm)
0.125 in (0.3 cm)
0.15 in (0.4 cm)
0.175 in (0.4 cm)
0.2 in (0.5 cm)
0.225 in (0.6 cm)
0.25 in (0.6 cm)
9
Advertisement
Table of Contents
