18 English Imperial Legal Standard Gauge (0.048 of an inch).
(35) All of the wording and its background shall be executed in vitreous
(‘porcelain’) enamel and the back and other part of the notice shall, if
not otherwise enamelled, have at least a grip coat of vitreous enamel.
(36) Warning notices shall be strongly fixed in upright positions directly
on and not more than 3 inches above the sheathings of the roofs,
closely adjacent to all points of access to the roofs.
(37) In the same way they shall also be fixed closely adjacent to all valleys
and other points where persons might reasonably be expected to enter
on the roofs.
(38) They shall be so placed that they constitute plain and clearly visible
warning to persons about to enter on the roofs.
(39) Each notice shall be so placed and so oriented, that the arrows on
them are directly above and point along the line of nails, screws, bolts,
or other fastenings that secure the roof sheathing to its immediate
supports.
(40) Each notice shall be so placed and so oriented that it clearly indicates
those lines that mark the positions and directions of uninterruptedly
continuous supporting members of the roof sheathing.
(41) No person shall fix a warning notice on a roof until the person has
first ensured that there is an uninterruptedly continuous supporting
member along each line of nails, screws, or other fastenings after
which to be indicated by the notice, and if any such member is not
uninterruptedly continuous the person shall cause it to be made so
before fixing the notice.
(42) If any supporting member of the sheathing of any roof is incapable of
safely supporting a concentrated load of 300 pounds acting vertically
downwards and so placed as to be of most adverse effect, no person
shall fix a warning notice as previously prescribed.
(43) Instead, danger notices shall be strongly fixed, as prescribed in this
section for warning notices.
(44) Danger notices shall bear the words—
Danger
Keep off this roof
in heavy block lettering in red on a white background.
(45) The word ‘Danger’ shall be at least 1 3/ 4 inches in height and shall be
heavily underlined in red.
(46) The remainder of the lettering shall be at least 13/8 inches in height.
(47) The danger notices shall not be less than 12 inches square and shall
in all other respects conform with the requirements of this regulation
for warning notices.
Miscellaneous and penalties Part 16
Part 16 Miscellaneous and penalties
General penalty
(1) When any matter or thing is by this regulation required, directed or
forbidden to be done, or if any authority is given by this regulation to
any person to require, direct or forbid any matter or thing to be done,
and the matter or thing so required or directed to be done remains
undone, or the matter or thing so forbidden to be done is done, in
every such case every person offending against the requirement,
direction or prohibition, commits an offence against this regulation.
(2) Any person guilty of a breach of this regulation shall, if no other
penalty is expressly provided in this regulation for the breach, be
liable to a penalty not exceeding $100.
Section 18 - Scaffolding and Lifts Regulation 1950 - English Imperial Legal Standard Gauge (0.048 of an inch). | Zoe
Schedule 3 Method of treatment of silica paint for the purpose of ascertaining the
percentage of free silica present
Schedule 3 Method of treatment of silica
paint for the purpose of
ascertaining the percentage of
free silica present
1 take 10g of paint and extract with successive portions of a suitable
solvent until the residue is free from vehicle
2 take 0.5g of dry residue and boil for 5 minutes with 50mL of 20%,
acetic acid containing 5.0g of ammonium acetate, then cool,
centrifuge, decant off the supernatant liquid, and wash the residue
with 50mL of 20% acetic acid
3 treat the residue with 50mL of 1:2 hydrochloric acid, boil, cool,
centrifuge, decant, and wash with 50mL of 1:2 hydrochloric acid
4 treat the residue with 25mL of concentrated sulphuric acid containing
5g of sodium sulphate, then heat to fuming, cool, centrifuge, decant,
and wash with 25mL of concentrated sulphuric acid, decant and wash
with 25mL of water
5 boil the residue for 5 minutes with 50mL of 10% sodium carbonate,
cool, centrifuge, decant, and wash with 50mL of 1:10 hydrochloric
acid
6 transfer residue to a platinum dish, evaporate to dryness, ignite, and
weigh (residue A)
7 treat the residue with 5mL of hydrofluoric acid, containing 0.5mL of
concentrated sulphuric acid, then heat on water bath for 1 hour,
evaporate to dryness over flame, ignite and weigh (residue B)
8 free silica equals residue A minus residue B
Processes to which s 73 (1) (o) applies Schedule 4
Schedule 4 Processes to which s 73 (1) (o)
applies
1 dry grinding of surfaces of metal, stone, concrete, or similar materials
by means of a wheel or discs driven by mechanical power
2 cutting, dressing, or carving of stone, concrete or similar material by
means of a portable tool driven by mechanical power
3 chipping, or scaling of painted or corroded metal surfaces or wire
brushing of the surfaces by mechanical power
4 cutting out or cutting off of cold rivets or bolts from any structure or
part of a structure
5 welding or cutting of metals by means of an electrical, oxyacetylene
or similar process
Schedule 5 Method of treatment of a lead compound for the purpose of determining the
percentage of dry compound of lead
Schedule 5 Method of treatment of a lead
compound for the purpose of
determining the percentage of
dry compound of lead
1 the material is to be treated with suitable solvents to remove the oil,
varnish, and other media, and the residue to be dried at 100° C and
thoroughly mixed
2 a weighed quantity of this extracted, dried and mixed material is to
be continuously shaken for 1 hour, at the common temperature, with 1
000 times its weight of an aqueous solution of hydrochloric acid
containing 0.25% by weight of hydrogen chloride
3 this solution is then to be allowed to stand for 1 hour and then filtered
4 the lead salt contained in the clear filtrate is then to be precipitated as
lead sulphide and weighed as lead sulphate
Table 7.1 Decompression—stoppages after exceeding ordinary time limits
(see s 99 (21) to (23))
66 11 29 over 3h ... ... ... ... ... ... 10 30 42
72 12 32 2 to 3h
...
...
...
...
...
...
...
...
...
...
...
...
78 13 341/2 11/2to 21/2h
over 21/2h
...
...
...
...
...
...
...
...
...
...
...
...
84 14 37 11/4 to 11/2h
11/2 to 13/4h
13/4 to 2h
2 to 21/2h
21/4 to 21/2h
21/2 to 23/4h
23/4 to 3h
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
...
of
132-144 22-24 59-641 /2 up to 6min
6 to 12min
12 to 16min
16 to 20min
...
...
...
...
...
...
...
...
...
...
...
...
...
...
144-156 24-26 641 /2 -70 up to 5min
...
...
...
...
...
...
...
...
...
...
156-168 26-28 70-75 up to 5min ... ... ... ... 2 5 10 4 30† 12
of
10 to 13min
13 to 16min
...
...
...
...
168-180 28-30 75-801 /2 up to 5min
5 to 9min
9 to 12min
12 to 14min
...
...
...
...
...
...
...
...
...
4 30† 12
180-192‡ 30-32 801 /2 -86 up to 5min
10 to 13min
...
...
...
...
...
... ... ...
of
192-204‡ 32-34 86-911 /2 up to 7min
7 to 12min
...
...
...
...
...
...
...
These figures are based on a double-acting pump with cylinder diameter 4 inches, stroke 71/2inches, working at 80% efficiency.
† If 30 revolutions per minute cannot be maintained, another cylinder may be used instead.
‡ Handworked pumps are unsuitable at this depth.
Table 7.3 Decompression times for different periods of exposure to working pressure
(see s 100 (31) and s 101 (31))
the
to
min
for
4h
for
3h
for
for
2h
for
for
for
1h
for
3/4h
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
18 or 19 2 3 4 2.0 3 1.5 3 1.5 2 1.0 2 1.0 2 1.0 1 0.5 1 0.5 1 0.5 1 0.5 1 0.5
20 or 21
22 or 23
24 or 25
26 or 27
28 or 29
4.0
5.7
6.8
7.5
7.9
2.3
3.7
5.0
6.0
6.6
2.0
3.0
3.8
4.5
5.0
1.7
2.2
2.8
3.3
3.7
1.3
2.0
2.4
2.8
3.1
1.0
1.5
2.0
2.3
2.7
1.0
1.5
1.8
2.2
2.4
0.7
1.0
1.4
1.7
1.9
0.7
0.7
1.0
1.3
1.6
0.3
0.5
0.8
1.0
1.1
0.3
0.2
0.4
0.5
0.7
30 or 31 8 5 64 8.0 54 6.8 43 5.4 32 4.0 27 3.4 24 3.0 21 2.6 17 2.1 14 1.7 10 1.2 6 0.8
the
to
min
for
4h
for
3h
for
for
2h
for
for
for
1h
for
3/4h
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
32 or 33
34 or 35
36 or 37
38 or 39
8.1
8.2
8.2
8.2
7.0
7.2
7.4
7.6
5.8
6.1
6.4
6.6
4.3
4.6
4.9
5.2
3.8
4.1
4.4
4.7
3.3
3.6
3.8
4.1
2.9
3.1
3.4
3.6
2.3
2.6
2.8
3.0
1.9
2.1
2.3
2.4
1.3
1.5
1.7
1.8
0.9
1.0
1.1
1.2
the
to
min
for
4h
for
3h
for
for
2h
for
for
for
1h
for
3/4h
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
40 to 41
42 or 43
44 or 45
46 or 47
48 or 49
...
...
...
...
8.2
...
...
...
...
7.6
7.6
7.6
7.6
7.6
6.7
6.7
6.8
6.9
6.9
5.5
5.7
5.9
6.1
6.2
4.9
5.2
5.4
5.6
5.8
4.3
4.6
4.8
5.0
5.2
3.7
3.9
4.1
4.3
4.5
3.1
3.2
3.3
3.5
3.7
2.5
2.6
2.8
2.9
3.1
1.9
2.1
2.2
2.3
2.4
1.2
1.3
1.4
1.5
1.6
50 or 51
52 or 53
54 or 55
56 or 57
...
...
...
...
...
...
...
...
...
...
...
7.6
...
...
...
...
6.9
6.9
6.9
...
6.2
6.3
6.3
6.4
5.9
6.0
6.0
6.1
5.3
5.4
5.5
5.6
4.6
4.8
5.0
5.2
3.9
4.1
4.3
4.6
3.2
3.3
3.4
3.6
2.5
2.6
2.7
2.8
1.7
1.8
1.9
2.0
the
to
min
for
4h
for
3h
for
for
2h
for
for
for
1h
for
3/4h
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
time
in
58 or 59 22 7 ... ... ... ... ... ... 140 6.4 135 6.1 126 5.7 117 5.3 104 4.7 83 3.8 63 2.9 47 2.1
60 23 7 ... ... ... ... ... ... 146 6.4 141 6.1 134 5.8 125 5.4 112 4.9 91 4.0 69 3.0 51 2.2
Note ‘Periods’ referred to in column headings are periods of exposure to working pressure, and should not be confused with working
periods at the face.
Medical standards and examination report for compressed air workers Schedule 8