Mechanical Couplers - Dayton Richmond™ Couplers
Table 1, “Recommended Dowel Bar Splicer and Dowel-in Sizes”, is a direct comparison of dowel
Diameters and appropriate substitution options.
Table 1: Recommended Dowel Bar Splicer and Dowel-in Sizes
Specified or Required Dowel Bar Size |
Recommended Dowel Bar Splicer and Dowel-in Space |
|||||||||
Bar Size
|
Grade 60 Rebar Loads (lbs) |
System Thread Size*
|
DB-SAE Bar Size
|
Dowel-In Bar Size
|
System Stress Area (min) |
Grade 60 Rebar Loads (lbs) |
||||
Py |
1.25 Py |
Pult |
Py
|
1.25 Py
|
Pult
|
|||||
#4
|
12,000 |
15,00 |
18,000 |
5/8”-11 |
#4 |
#4 |
.20 |
12,000 |
15,000 |
18,000 |
#5
|
18,600 |
26,250 |
27,900 |
3/4"-10 |
#5 |
#5 |
.31 |
18,600 |
23,250 |
27,900 |
#6
|
26,400 |
33,00 |
39,600
|
7/8”-9 |
#6 |
#6 |
.44 |
26,400 |
33,000 |
39,600 |
#7
|
36,000 |
45,00 |
54,00
|
1”-8 |
#7 |
#7 |
.60 |
36,000 |
45,000 |
54,000 |
#8
|
47,400 |
59,250 |
71,100 |
1-1/8”-8 |
#8 |
#8 |
.79 |
47,400 |
59,250 |
71,100 |
#9
|
60,000 |
75,000 |
90,000 |
1-1/4”-8 |
#9 |
#9 |
1.00 |
60,000 |
75,000 |
90,000 |
#10
|
76,200 |
95,250 |
114,300 |
1-7/16”-8 |
#10 |
#10 |
1.27 |
76,200 |
95,250 |
114,300 |
#11
|
93,600 |
117,000 |
140,400 |
1-9/16”-8 |
#11 |
#11 |
1.56 |
93,600 |
117,00 |
140,400 |
*5/8”, 3/4", 7/8” and 1” sizes have UNC threads, 1-1/8” and larger sizes equipped with UN threads.
Table 2, “Required Development and Lap Lengths”, summarizes required development and lap lengths
For various psi concretes, per American Concrete Institute (ACI) Standard 318-95.
Refer to ACI Standard 318-95, Chapter 12 for development formulas, multipliers and limitations.
Table 2: Required Development and Lap Lenghts for Grade 60, Uncoated, Bottom
Reinforcement in Normal Weight Concrete
APPLICATION |
f’c
|
#6 and Smaller Bars
|
#7 and Larger Bars
|
|
Clear spacing of bars being developed or spliced not less than db, clear cover not less than db, and beam stirrups or column ties throughout ld not less than the code minimum or Clear spacing of bars being developed not less than 2db and clear cover not less than db |
3,000 |
44 db |
55 db |
|
4,000 |
38 db |
47 db |
||
5,000 |
34 db |
42 db |
||
6,000 |
31 db |
39 db |
||
8,000 |
27 db |
34 db |
||
10,000 |
24 db |
30 db |
||
|
3,000 |
66 db |
82 db |
|
4,000 |
57 db |
71 db |
||
|
Other cases |
5,000 |
51 db |
64 db |
|
6,000 |
46 db |
58 db |
|
|
8,000 |
40 db |
50 db |
|
|
10,000 |
36 db |
45 db |
|
Table 3, “Basic Development Length of Standard Hooks for Grade 60 Rebar” indentifies basic development
lengths of hooked rebar embedded in various specified compressive strength and normal weight concrete.
Table 3: Basic Development Length of Standard Hooks for Grade 60 Rebar
Rebar Size |
Normal Weight Concrete (psi) |
||
3,000 |
4,000 |
5,000 |
|
#3 |
8.2 |
7.1 |
6.4 |
#4 |
11.0 |
9.5 |
8.5 |
#5 |
13.7 |
11.9 |
10.6 |
#6 |
16.4 |
14.2 |
12.7 |
#7 |
19.2 |
16.6 |
14.8 |
#8 |
21.9 |
19.0 |
17.0 |
#9 |
24.7 |
21.4 |
19.1 |
#10 |
27.8 |
24.1 |
21.6 |
#11 |
30.9 |
26.8 |
23.9 |
#14 |
37.1 |
32.1 |
28.7 |
#18 |
49.4 |
42.8 |
38.3 |
Table 4, “Recommended DB-SAE-3 Headed Splicer Dowel-in Sizes”, displays information pertaining to
splices utilizing the DB-SAE-3 Headed Splicer shown in the detail below.
Table 4: Recommended DB-SAE-3 Headed Splicer Sizes – Grade 60 Rebar
System Thread Size
|
DB-SAE-3 Headed Splicer
|
Embed Length (12D)
|
Load Capacity |
|
1.25 Py |
1.5 Py |
|||
5/8”-11unc |
#4 |
6” |
15,000 |
18,000 |
3/4"-10unc |
#5 |
7-1/2” |
26,250 |
27,900 |
7/8”-9unc |
#6 |
9” |
33,000 |
39,600 |
1”-8unc |
#7 |
10-1/2” |
45,000 |
54,000 |
1-1/8”-8unc |
$8 |
12” |
59,250 |
71,100 |
Table 5, “Reinforcing Steel Data”, shows the ASTM Standards for reinforcing bars.
Table 5: ASTM Standard Rebar Data
Bar Size |
Designation Weight (lbs. Per ft) |
Nominal Diameter |
|
Diameter (in) |
Cross-Section Area (sq. in.) |
||
#4 |
0.668 |
0.500 |
0.20 |
#5 |
1.043 |
0.625 |
0.31 |
#6 |
1.502 |
0.750 |
0.44 |
#7 |
2.044 |
0.875 |
0.60 |
#8 |
2.670 |
1.000 |
0.79 |
#9 |
3.400 |
1.128 |
1.00 |
#10 |
4.303 |
1.270 |
1.27 |
#11 |
5.313 |
1.410 |
1.56 |
|
|
DOWEL BAR SPLICER (DB-SAE)
SPECIAL SPLICERS (DB-SAE-3) AND (DB-SAE-4) |
 Note: All tolerences are per Concrete Reinforcing Steel Institute (CRSI) design manual criteria. All bends are assumed 90º unless otherwise states. |
