THE GLUING OF WOOD 
Table 7. — Gluing sclwdules 
51 
Glue- 
water 
Glue 
spread 
Temper- 
Closed i 
Class or gluing schedule 
propor- 
ature of 
Pressure 
assembly 
tion i by 
the wood 
time 
weight 
Lbs. per 
1,000 
Lbs. per 
sq. ft. 3 
°F. 
sq. in. 
Minutes 
f 1 to 2H 
60 to 65 
70 
100 to 150 
Oto 1 
Al 4 _______ 
I lto2K 
1 1 to 2H 
65 to 70 
80 
90 
100 to 150 
100 to 150 
lto 5 
70 to 75 
3 to 20 
I lto3 
70 to 75 
90 
100 to 150 
5 to 20 
f lto2H 
65 to 70 
70 
125 to 175 
Hto 1 
A2*_; _ 
J lto2H 
1 lto2H 
70 to 75 
75 to 80 
80 
90 
125 to 175 
2 to 5 
7 to 18 
I lto2& 
75 to 80 
90 
125 to 175 
10 to 20 
f lto2H 
65 to 70 
70 
150 to 200 
H to 1 
A3 4 
1 lto2H 
1 lto2H 
70 to 75 
80 
90 
150 to 200 
150 to 200 
3 to 5 
75 to 80 
10 to 18 
I 1 to 2i/4 
75 to 80 
90 
150 to 200 
12 to 18 
CI" - 
f lto2 
I 1 to 21/5 
60 to 70 
70 to 90 
100 to 150 
Oto 15 
70 to 80 
70 to 90 
100 to 150 
3 to 20 
C25 " 
f 1 to 1% 
70 to 75 
70 to 90 
150 to 200 
Oto 12 
\ 1 to 2 
75 to 80 
70 to 90 
150 to 200 
5 to 20 
VI" 
r ito2i/i 
\ 1 to 2i/4 
60 to 70 
70 to 90 
100 to 150 
Oto 20 
70 to 80 
70 to 90 
100 to 150 
1 to 25 
V2« 
/ lto2& 
\ lto2k 
70 to 75 
70 to 90 
70 to 90 
150 to 200 
5 to 20 
75 to 80 
150 to 200 
5 to 25 
i The recommended proportions of glue and water are in general suitable for both lumber and veneer 
gluing but ordinarily it is better to use thicker glue mixtures with lumber than with veneer. 
1 Wood pieces laid together as soon as spread with glue. 
5 Weight of wet glue mixture. 
An animal glue equivalent to about a No. 12 in the National Association of Glue Manufacturers grades. 
Other grades may be used by making suitable adjustments in the glue-water proportion. 
5 Average prepared casein and vegetable glues; some commercial glues require more or less water to 
obtain the same consistency of mixture. 
Table 8. — Index of gluing schedules for different woods 
[H=heartwood; S=sapwood; M = heartwood and sapwood mixed] 
Species 
Alder, red M 
Ash H 
Do S 
Basswood M 
Beech H 
Do S 
Birch H 
Do S 
Butternut M 
Cedar, Alaska M 
Cedar, eastern red-.H 
Do S 
Cedar western red_-H 
Cherry, black H 
Chestnut M 
Cottonwood M 
Cypress, southern,. H 
Do .. S 
Douglas fir H 
Elm, American M 
Elm, rock M 
Fir, white M 
Gum, black H 
Do S 
Gum, red H 
Do S 
Gum, tupelo H 
Animal 
C asein 
glue 
glue 
Schedule 
Schedule 
A2 
CI 
A3 
C2 
A3 
C2 
A3 
C2 
i A3 
1C2 
A3 
C2 
1A3 
1C2 
A3 
C2 
A2 
C2 
A2 
C2 
i A3 
CI 
A2 
CI 
Al 
CI 
A3 
C2 
Al 
CI 
A2 
C2 
A3 
CI 
Al 
CI 
Al 
C2 
A3 
C2 
A3 
C2 
Al 
CI 
i A3 
C2 
A3 
C2 
i A3 
1C2 
A3 
C2 
i A3 
C2 
Vege- 
table 
glue 
Schedule 
VI 
V2 
V2 
VI 
i V2 
V2 
i V2 
V2 
VI 
V2 
VI 
VI 
VI 
V2 
VI 
VI 
VI 
VI 
VI 
V2 
V2 
VI 
1V2 
V2 
1V2 
V2 
V2 
Species 
Gum, tupelo S 
Hemlock, western _ M ■ 
Hickory M 
Magnolia H 
Do S 
Mahogany H 
Maple, soft (commer- 
cial) M 
Maple, sugar M 
Oak, red M 
Oak, white M 
Osage orange H 
Pecan H 
Persimmon S 
Pine, northern white 
M 
Pine, southern vellow 
M 
Pine, western vellow 
M 
Poplar, yellow M 
Redwood H 
Sassafras M 
Spruce M 
Sycamore M 
Walnut, black M 
Animal 
Casein 
glue 
glue 
Schedule 
Schedule 
A3 
C2 
Al 
CI 
A3 
i C2 
A3 
C2 
A3 
C2 
A2 
C2 
A3 
C2 
A3 
C2 
A3 
C2 
A3 
C2 
i A3 
1C2 
A2 
C2 
A3 
C2 
Al 
CI 
A2 
C2 
A2 
CI 
A2 
C2 
Al 
CI 
A2 
C2 
Al 
CI 
A3 
C2 
A3 
C2 
table 
glue 
Schedule 
V2 
VI 
V2 
V2 
V2 
V2 
V2 
V2 
V2 
V2 
1V2 
V2 
V2 
VI 
V2 
VI 
VI 
VI 
V2 
VI 
V2 
V2 
i Treatment of the wood before gluing as described on page 48 is recommended where the strongest 
possible joints are required. 
