Wednesday, May 22, 2013

Building a nursery

April 8, 2013

The first step of the project was building six greenhouses on the land that was cleared for a nursery. This is where the rice will get the first start. Below is all the supplies needed for these greenhouses. 

Supplies needed for six greenhouses:

PVC pipes (sched 40)
36--1/2" 10 ft long
36--3/4" 5 ft long
60--3/4" 1 ft., 10" long
48--3/4" 2" long

24--3-way elbow reducer 
24--(3/4" to 1/2")
24--Ma1e 1/2"
48--3/4” Tee-connector 

48--3/4” to 1/2” Tee-reducer 

3--PVC glue, 1 pint 
(e.g. “Weld-On 735 Wet n’Fast”)

1--Plastic sheeting, 4-mil 10 ft x 11 ft 6
(e.g. Weather Check)

12--Bird netting 4 ft x 6 ft
(green ground netting will do)

24--Rebar, 4’ x 3/4” diameter
(you will need to bend into L shape) 

3 packages--Zip ties, 11.1” 

4 rolls--Duct tape 
Staplers 1 box of staples, couple stapler

Item needed for one greenhouse

PVC pipes (sched 40)
6--1/2" 10 ft long
6--3/4" 5 ft long
10--3/4" 1 ft., 10" long
8--3/4" 2" long

4--3-way elbow reducer (3/4" to 1/2")
4--Male 1/2"
8--3/4” Tee-connector 

8--3/4” to 1/2” Tee-reducer 

PVC glue, 1 pint 
(e.g. “Weld-On 735 Wet n’Fast”)

1--Plastic sheeting, 4-mil 10 ft x 11 ft 6
(e.g. Weather Check)

2--Bird netting 4 ft x 6 ft 12
(green ground netting will do)

4--Rebar, 4’ x 3/4” diameter
(you will need to bend into L shape) 

1 packages--Zip ties, 11.1” 

1 rolls--Duct tape 
Staplers 1 box of staples, couple stapler


Assemble base according to Figure 1. The base will be a permanent structure and will be glued together with PVC glue. For strength, the base will be constructed using ¾” PVC pipe. All components of the base, shown in Figure 1, should be glued together. Simply daub on glue on both items to be glued together (the inside of the connector and outsize of pipe that will fit in the connector, for example) and quickly connect the pieces together. Speed is key as the glue dries quickly. No primer is necessary if the brand named above is used. 

A. Attach the 3-way elbow reducer to the male ½” attachments. Glue two of these to the ends of a 5’ PVC pipe. To each open ¾” end of the elbow reducer, glue a 1’10” PVC pipe. Glue a ¾” tee to the ends of each 1’10” pipe and another 5’ pipe to the horizontal openings of the tee connectors (Figure 2). 

B. To the tee connector openings of (A), glue and attach a 2” pipe and a ¾”½” reducer tee (Figure 3). Leave the openings of the ½” perpendicular, as the 10’ PVC will attach to these later to form a half hemisphere. NOTE: graphic of reduced elbow tee is not a perfect image; please see photo in Figure 3 for a better example of what it should look like. Glue another set of 1’10” pipes to the ends of the reducer tee. To these, insert and glue a set of ¾” tees, and a horizontal 5’ pipe.

C. Attach and glue another 2” pipe to the bottom of (B), connected (and glued) by another set of reducer tees. Insert a set of 1’10” pipes into the bottom of the reducer tees followed by a set of ¾” tee connectors and a horizontal 5’ pipe (Figure 4).

D. Repeat C

E. To (D), attach and glue a set of 2” pipes followed by reducer tees. Insert 1’10” pipes to the bottom of these, and connect and glue them to two reducer elbows (same as A). Add the final horizontal 5’ pipe (Figure 5). 

2. Assemble half hemisphere top as shown in Figure 6. The half hemispheres will be removable and made of more flexible .” PVC pipes. To stabilize the top, attach a pipe to the top of the dome structure with zip-ties (Figure 7). DO NOT GLUE THESE ONTO THE STRUCTURE!!! 

3. Secure plastic sheeting to PVC frame. Using duct tape, re-enforce sections of the plasting sheeting, poke holes, and slip zip ties through (Figure 8). 

4. Attach bird netting mesh with zip ties and stapler as shown in Figure 9. Completed greenhouse can be seen in Figure 10. Make sure to use zip ties to secure bird netting all around the hoop roof, as staplers are not sufficient enough. 

5. Use bent rebar to secure greenhouses to soil as shown in Figure 10. Rebar should be hammered into the soil to prevent greenhouses from blowing away. ISD staff will bend the rebar for you. 

C Figure 10. A. Dimensions of rebar. B. Bird’s-eye view of base and where rebar should be placed. C. Side view of greenhouse and rebar once installed. Dashed lines indicate where rebar should be below ground. 

No comments:

Post a Comment