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2.2
LOAD REQUIREMENTS FOR STRUCTURE: The climbing structure to which the LAD-SAF™ system is installed must be
capable of supporting the total loading imposed by the system.
A.
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:
i.
L3 top bracket weight = 24 lbs (10.9 kg)
ii.
100 ft (30m) of 3/8" (9.5mm) 1x7 Galvanized cable weight = 27 lbs (12.3 kg)
iii.
TOTAL STATIC LOADING: (24 lbs + 27 lbs) x 1.2SF = 61 lbs
B.
DYNAMIC LOADING: The following are the dynamic loads imposed onto the system per user:
i.
One user: 2,700 lbs (12 kN)
ii.
Two user: 3,320 lbs (14.76 kN)
iii.
Three user: 3,940 lbs (17.51 kN)
iv.
Four user: 4,560 lbs (20.27 kN)
C.
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:
i.
Static loading for a 100 ft (30 m) system: 61 lbs (0.27 kN)
ii.
Dynamic loading for a two-user system: 3,320 lbs (14.76 kN)
iii.
Total loading = 3,381 lbs (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 and M2.
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 section 3.0.
Bottom Bracket Assembly: The bottom bracket connection must be capable of supporting a system pretension load of
350 lbs (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.
3.0 SYSTEM INSTALLATION
3.1
LAD-SAF
systems are designed for easy installation onto a variety of structures. To begin the installation you need
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to know the model numbers of the system, cable guides, standoffs and type of cable (galvanized or stainless steel).
Figures 2 through 11 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.
• Use proper safety procedures when installing LAD-SAF
;
• Wear personal protective equipment, including safety glasses and steel-toed shoes.
• Use personal fall arrest or restraint systems when exposed to a fall hazard while installing
LAD-SAF
systems.
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• Do not connect to the LAD-SAF
• Do not connect to a partially installed LAD-SAF
• Use caution when installing LAD-SAF
3.2
WELDING RECOMMENDATIONS: Some installations require welding brackets to the structure. DBI-SALA recommends
that welding be completed by a certified professional welder in accordance with applicable national welding codes or
standards. Base and filler materials must be compatible with galvanized or stainless steel, depending on the materials of
your system. Protect finished welds from corrosion with coating or paint.
(10.9 kg + 12.3 kg) x 1.2SF x 9.81 m/s2= 0.27 kN
system is installed from the top of the structure down. The basic procedure is:
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system being installed.
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systems near electrical power lines. LAD-SAF
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systems.
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system.
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13
cables are conductive.
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