Doka Ringlock - Additional Safety and Handling Guidelines; Scaffolding Operations Safety

User Information Ringlock Scaffold
41999817902 - 10/2022
Plank Arrangement
Ringlock Planks can be arranged using alternating or
parallel arrangements. The Plank arrangement
depends on the duty rating and the size of the bays
required. Substitute typical Ledgers for Truss Ledgers,
as necessary. The arrangement of the Planks should
be established prior to erecting Ringlock scaffolds.
Alternating Planks
Arrange the planks in an alternating fashion to limit the
amount of loads acting on the Truss Ledgers. Notice
there are two Truss Ledgers for each bay (This is the
preferred method of supporting duty ratings).
Plan of Alternating Plank Arrangement (Multibay)
The Truss Ledger must be checked to ensure it is capa-
ble of supporting the required duty rating. Refer to the
tables to determine when to replace a typical Ledger
with a Truss Ledger when using an alternating plank
arrangement.
Load Class 2 - 1.5 kN/m
2
:
Load Class 3 - 2 kN/m
2
:
Load Class 4 - 3 kN/m
2
:
A Truss Ledger
B Ledger
C Standard
D Direction of Planks
981 - -0179 321
B
C
D
A
Bearer
(Transom)
Length [m]
Bay Length [m]
0.73 1.09 1.40 1.57 2.07 2.57 3.07
0.73 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.09 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.40 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.57 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
2.07 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
2.57 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
3.07 Ledger Ledger Ledger Ledger Ledger
Truss Truss
Bearer
(Transom)
Length [m]
Bay Length [m]
0.73 1.09 1.40 1.57 2.07 2.57 3.07
0.73 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.09 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.40 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.57 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
2.07 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
2.57 Ledger Ledger Ledger Ledger Ledger Ledger
Truss
3.07 Ledger Ledger Ledger Ledger
Truss Truss Truss
Bearer
(Transom)
Length [m]
Bay Length [m]
0.73 1.09 1.40 1.57 2.07 2.57 3.07
0.73 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.09 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.40 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
1.57 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
2.07 Ledger Ledger Ledger Ledger Ledger Ledger Ledger
2.57 Ledger Ledger Ledger Ledger Ledger
Truss Truss
3.07 Ledger Ledger
Truss Truss Truss Truss Truss