OVERCOME REINFORCING STEEL CONGESTION
THREADING
The Cold forming method is essentially simple - the shape of the end of the rebar to be threaded, is modified via a round accurately predetermined sized steel die set. The forming load is minimal and applied transversely to the grain flow of the material, this in effect aligns the grain flow of the ribs and the core diameter. The core diameter and ribs are formed to an accurate circular shape suitable to thread roll. For a standard thread suitable for the 32mm Type A rebar coupler this takes approximately 10 seconds.
HIGH TENSILE STRENGTH BAR COUPLER
IMBMS-BAR COUPLER
The couplers are designed to provide high tensile strength connections with external ribs or spanner flats, for easy gripping by hand tools; such as spanner, pipe wrench and chain wrench etc.
IMBMS-BAR COUPLER (NORMAL-TEMPERATURE SWAGED BAR)
• No heat applied, no upsetting, no thread cutting • Through normal-temperature swaging, original stress-resistance in tension and compression force is ensured • Concrete placement is easy thanks to the small diameter and short length of the coupler • Couplers are available for dissimilar sizes on request
|
TYPICAL TEST RESULTS-BS 8100 Hot Rolled Bars BS.4449 |
||||
|---|---|---|---|---|
|
NOMINAL BAR SIZE |
YIELD STRESS (N/mm2) |
ULTIMATE STRESS |
PERMANENT ELONGATION (0.6fy) mm |
FAILURE MODE |
|
40 |
537 |
628 |
0.0721 |
BAR BREAK |
|
32 |
526 |
638 |
0.0518 |
BAR BREAK |
|
28 |
533 |
653 |
0.0480 |
BAR BREAK |
|
25 |
540 |
638 |
0.0014 |
BAR BREAK |
|
20 |
505 |
618 |
0.0021 |
BAR BREAK |
|
16 |
507 |
621 |
0.0048 |
BAR BREAK |
|
12 |
521 |
638 |
0.0040 |
BAR BREAK |
IMBMS-BAR INSTALLATION
TYPE A
• Used where the continuity bar can rotated. Final tightening is by wrench, spanner etc. • Used for P.S.C. Box at the top of the bridge: ILM, FCM, MSS method of construction, second application, Slip-Form construction, etc.
TYPE B
• We extend the bar thread at one side to allow the coupler to screw right on, flush with bar end. On assembly the bar ends are placed against each other and the coupler rotated onto the short thread to form the connection • Turn the coupler onto the short thread to complete the assembly and tighten the bar with a wrench
Used in application of large sized long bars (for slip-form, column, post applied in the site) where bars can be rotated but may be difficult to do so.
TYPE C
• We extend the bar thread at one side to allow the lock-nut and coupler to screw right on flush with bar end • To assemble, the bar ends are placed against each other and the coupler rotated onto the short thread to form the connection. Wrench tighten the coupler onto the short bar and rotate the lock nut against the coupler and wrench tight
Used for construction of prefabricated cages.
COUPLER SIZE
|
BS.4449 |
|||||||
|---|---|---|---|---|---|---|---|
|
NOMINAL BAR SIZE (Ømm) |
12 |
16 |
20 |
25(26) |
32 |
40 |
|
|
COUPLER DIAMETER (mm) |
19 |
23 |
31 |
38 |
48 |
60 |
|
|
HEXAGON-B (mm) |
17 |
21 |
29 |
36 |
46 |
56 | |
|
COUPLER LENGTH |
30 |
38 |
46 |
58 |
70 |
86 |
|
|
ASTM A615/A 615M |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
BAR DESIGNATION (#) |
3(10) |
4(13) |
5(16) |
6(19) |
7(22) |
8(25) |
9(29) |
10(32) |
11(36) |
14(43) |
|
|
COUPLER DIAMETER (mm) |
18 |
20 |
24 |
28 |
32 |
38 |
42 |
48 |
55 |
65 |
|
|
COUPLER LENGTH |
22 |
30 |
38 |
45 |
50 |
58 |
65 |
70 |
78 |
95 |
|
TERMINATOR
LONGITUDINAL RE-BARS
|
BS.4449 |
|||||||||
|---|---|---|---|---|---|---|---|---|---|
|
BAR SIZE |
12 |
16 |
20 |
25 |
28 |
32 |
40 |
||
|
LONGITUDINAL RE-BARS |
DIAMETER |
29 |
36 |
45 |
56 |
65 |
72 |
90 |
|
|
THICKNESS |
6 |
7 |
8 |
9 |
10 |
10 |
18 |
||
|
H |
15 |
19 |
23 |
29 |
32 |
35 |
43 |
||
|
LOCK NUT |
WIDTH |
(8) |
10 |
13 |
18 |
(18) |
18 |
25 |
|
IMBMS WELDABLE COUPLER SIZE
Weldable couplers allow unrestricted and easy placing of re-bar to steel piles, forms, etc.
|
BS. 4449 |
||||||||
|---|---|---|---|---|---|---|---|---|
|
BAR SIZE |
12 |
16 |
20 |
25 |
28 |
32 |
40 |
|
|
COUPLER DIAMETER (mm) |
19 |
23 |
31 |
38 |
43 |
48 |
60 |
|
|
COUPLER LENGTH |
15 |
19 |
23 |
29 |
33 |
35 |
43 |
|
|
ASTM A615/A 615M |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
BAR DESIGNATION (#) |
3(10) |
4(13) |
5(16) |
6(19) |
7(22) |
8(25) |
9(29) |
10(32) |
11(36) |
14(43) |
|
|
COUPLER DIAMETER (mm) |
18 |
20 |
24 |
28 |
32 |
38 |
42 |
48 |
55 |
65 |
|
|
COUPLER LENGTH |
22 |
30 |
38 |
45 |
50 |
58 |
65 |
70 |
78 |
95 |
|
IMBMS-FORM SAVER
Coupler has an attached nail plate for accurate and easy fixing to wooden form.
|
BS. 4449 |
||||||||
|---|---|---|---|---|---|---|---|---|
|
BAR SIZE |
12 |
16 |
20 |
25 |
28 |
32 |
40 |
|
|
COUPLER DIAMETER (mm) |
19 |
23 |
31 |
38 |
43 |
48 |
60 |
|
|
COUPLER LENGTH |
30 |
38 |
46 |
58 |
65 |
70 |
86 |
|
|
ASTM A615/A 615M |
|||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
|
BAR DESIGNATION (#) |
3(10) |
4(13) |
5(16) |
6(19) |
7(22) |
8(25) |
9(29) |
10(32) |
11(36) |
14(43) |
|
|
COUPLER DIAMETER (mm) |
18 |
20 |
24 |
28 |
32 |
38 |
42 |
48 |
55 |
65 |
|
|
COUPLER LENGTH |
22 |
30 |
38 |
45 |
50 |
58 |
65 |
70 |
78 |
95 |
|