Very often we spring in Siberia is thrown long and cold And because the seedling is the most popular vegetable crops of cucumbers and tomatoes most gardeners to plant in the open ground even in late may, not in a hurry — in fact, long-term observations frosts can back right up to June 10, However, to delay this case is impossible — in fact the first autumn frosts occur in late August In such a short period of warm vegetables couldn’t even ripen.
Not much better is the situation in most parts of the European territory of the country — no wonder even the average strip considered a zone of risky agriculture, And therefore to grow vegetables without greenhouses — it is unreliable meanwhile in today’s time Masterova person to make the greenhouse not only difficult, but also inexpensive, besides, for those who planned in the future large construction site (family scale), construction of the greenhouse will be a good practice.
Before starting the construction of the greenhouses, made its preliminary design in the calculation of available lumber. During the design has determined the required number of them and it became clear what and how much to acquire.
Greenhouse — stationary (non-separable), classical forms (so to speak) — in the form of a house, in terms of rectangular form with saddle roof and Gables.
The Foundation of The greenhouse is quite peculiar, First at the projected perimeter of the walls was laid a powerful uneven bars (the cross section is almost the same as the sleepers of a railway track, and is also impregnated with antiseptic) Angular coupling beams performed “vpoldereva”, and sealed them with steel clamps Then along the boards on the inner side at the corners and at regular intervals was Packed piles of steel angle corner No. 4. 5 (45x45x5 mm) length 1510 mm to a depth of about 1200 mm.
View of the greenhouse from the inside out
The upper ends of the corners adjacent to the rails shelves drilled close to each other on the two holes with a diameter of 6.5 mm and after they attached the bars to the piles of 200-mm nails Turned out so that the beams hung at some distance from the ground, the pile raft Foundation But this is Later on the entire inner area of poured humus — fertile organic soil with a thickness exceeding 200 mm, which fell under the boards, covering the slot On Foundation beams laid timbers of the waist cross-section 100×100 mm frame for the future of greenhouses, cementing those other 200-mm nails.
Frame walls scheduled to perform from the timber section 100×60 mm, the Distance between adjacent racks was assigned to 1 m as assumed to cover the walls with a thick plastic film At the great distances it is difficult to provide such a tension of the film in which she hadn’t fluttered in the wind and not much would SAG under the heat of sun rays.
The connection of the uprights with strapping may be different, groove — joint, straps, Connemara or the most primitive way — with random nails on Top of the rack are connected to the cantrail Fastening elements similar to that performed in the lower harness. In the gable walls of the rail cut, because the middle part of the set jambs of the doorway. As the walls of the greenhouse low, then part of the doorway had to get the Gables To the same high door facilitates quick and complete ventilation of the greenhouse on hot days — because most warm air accumulates under the roof. Here I’ll note that to control humid-heat conditions inside the greenhouse in its end walls is sure to enjoy the closed-open small vent holes similar to vent.
As the walls are rectangular in shape (as is known from the geometry of non — rigid shapes), at least between the corner and adjacent racks, in side and gable walls, it is necessary to set the jib.
Fig. 1. Frame backyard greenhouse:
1 — pile (area 45×45, L=1510, 14); 2 — longitudinal grillage (250×100 beam, L=6000, 2 units), 3 — the bottom longitudinal rail (timber 100×100, L=6000, 2 PCs.), 4 — (100×60 beam, L= 1600, 14 piece), 5 — brace (a bar 100×60, 8-piece), 6 — upper longitudinal rail (timber 100×60, L=6000, 2); 7 — ridge beam-farm (2 pieces), 8 — stropilnaja a foot (Board 100×30-20), 9 — door frame (timber 100×60, 4-piece), 10 — bolt (timber 50×50, 2 PCs), 11 — door lintel (timber 100×60,); 12— door frame (s20 Board, 2 PCs); 13 — upper cross rail (timber 100×60, 4-piece), 14 — lower cross rail (timber 100×100, 2 PCs), 15 — transverse grillage (250×100 beam, 2 PCs.)
Fig. 2. Ridge beam-a farm:
1 — lower zone (Board s25, L=6000), 2 — the upper zone (Board s25, L = 6000), 3 — front (s25 Board, L450, 3 PCs), 4 — brace (Board s25, L1250, 2)
This will interrupt description design designed greenhouses and return to the time of its construction, when the Foundation — or rather, pile-raft Foundation was ready and it was already laid timbers of the waist framing walls At this time passing on a busy street, saw in one of the apartments of multi-storey houses changed the window frames to the glazing. Then it occurred to that would be these frames to use in the construction of the greenhouses Asked the owner how he was going to use them Heard the answer’ “If you help me take out the dustbin, so be it” after seeing Windows I realized that to dump them even before the wood rot and dry — to greenhouses are the best and do not immediately agreed to transport the frame and moved to his home.
The house measuring the Windows and figured out how to distribute them on the walls, Not all frames were identical, and their dimensions were not multiples of the length and width of the constructed Foundation In the end this problem was solved quite simply: long (side) walls set two racks-inserts and a short (gable) walls offset the difference in size due to the width of the doors — they also improvised and made them a little wider than was necessary.
At the bottom of the harness, generally speaking, need has disappeared, but decided not to disassemble — very firmly nailed her bars to the Foundation. The top rail was left as in the conceptual design because it helps support the rafters of the roof.
The roof frame is made, as mentioned earlier, the same as conceived in the original version, because the old RAM was only enough of the wall.
First, the ridge beam was made of boards,”daccattato” 150 mm wide, flat farm Bottom chord put on the door lintels, and the upper attached to the upper ends of the rafters, the Lower ends of the rafters cut into the upper trim of the side walls and secured with nails then each pair of rafters are fastened with the bolts of the segments of the beam cross section 50×50 mm, passing them under the lower zone of ridge farm.
Rafters were projected over each bar and between them (see drawing) to film the roof is not much slack In them set them less often (see photo) that was also acceptable because the roof used reinforced plastic sheeting Pressed her to the rafters and trim the top a thin wooden slats, and the slats nailed small nails the same film fitted frames doors — they are quite high and because glass would be too heavy to Open the doors often enough, and the glass in this case — is unsafe.
Now, building a greenhouse, I have the opportunity to plant vegetable seedlings almost a month earlier than those gardeners who have greenhouses do not, do not fear nor late spring or early autumn frosts.