3.0
SYSTEM INSTALLATION
3.1
LOAD REQUIREMENTS FOR STRUCTURE: The structure to which the LAD-SAF™ system is installed must be capable of
supporting the Total Loading imposed by the system.
STATIC LOADING: The static loads imposed onto the system include the weight of the top bracket, weight of the cable
per length of system and a safety factor (SF). The following is an example for determining the static loading imposed
on the system for a 100 ft (30 m) system:
1.
L3 top bracket weight = 24 lb. (10.9 kg)
2.
100 ft (30m) of 3/8" (9.5mm) 1x7 Galvanized cable weight = 27 lb. (12.3 kg)
3.
TOTAL STATIC LOADING: (24 lb. + 27 lb.) x 1.2SF = 61 lb.
DYNAMIC LOADING: The following are the dynamic loads imposed onto the system per user:
1.
One user: 2700 lb. (12 kN)
2.
Two user: 3320 lb. (14.76 kN)
3.
Three user: 3940 lb. (17.51 kN)
4.
Four user: 4560 lb. (20.27 kN)
TOTAL LOADING: The total load imposed onto the structure must take into account the static and dynamic loading
given above for the length and type of system. Below is an example in determining total loading imposed onto the
structure:
1.
Static loading for a 100 ft (30 m) system: 61 lb. (0.27 kN)
2.
Dynamic loading for a two-user system: 3320 lb. (14.76 kN)
3.
Total loading = 3381 lb. (15 kN)
The following systems allow up to two users on the system at one time (see Table 2):
Systems L1, L2, W1, and CE1.
The following systems allow up to four users on the system at one time (see Table 2):
Systems L3, M1, M2, and T1.
For structures that require a continuous length of vertical lifeline over 500 ft (151m), 3M recommends the
use of the following:
6116633 (4 users) – over 500 ft (151m) and up to 800 ft (242m).
6116633 (rated to 3 users) – over 800 ft (242m) and up to 2000 ft (606m).
; The system can be rated to 2 users to lower the load imposed onto the attachment structure.
; Other installation requirements may limit the number of users allowed on a system. See the rest of
Section 3.0 for more information.
Bottom Bracket Assembly: The bottom bracket connection must be capable of supporting a system pre-tension load of
350 lb. (1.6 kN) in the direction of loading.
For calculation purposes, the required bracket load may be assumed to be distributed evenly between the number of rung
attachments.
3.2
GENERAL INSTALLATION: LAD-SAF
the installation, know the model numbers of the system, cable guides, standoffs and type of cable (galvanized or stainless
steel). Figures 2 through 12 identify most models. Some brackets are designed to be installed using stand-off supports
which go between the bracket and structure. You need to know model numbers of stand-off supports if included with your
system. See Table 1 for model numbers of most stand-off supports. Follow the instructions for the models included in your
system.
Generally, the LAD-SAF
Step 1.
Install the top bracket
Step 2.
Connect the cable to the top bracket
Step 3.
Install the cable guides
Step 4.
Install the bottom bracket assembly
Step 5.
Tension the cable
Step 6.
Inspect the installation
Planning the installation can minimize the amount of time on the structure and improve safety.
(10.9 kg + 12.3 kg) x 1.2SF x 9.81 m/s2= 0.27 kN
systems are designed for easy installation onto a variety of structures. To begin
™
system is installed from the top of the structure down. The basic procedure is:
™
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