{"product_id":"single-half-arch-sawtooth-greenhouse","title":"Single Half-Arch Sawtooth Greenhouse","description":"\u003cdiv data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e\n\u003cmeta charset=\"utf-8\"\u003e \u003cmeta http-equiv=\"Content-Type\" content=\"text\/html; charset=utf-8\"\u003e\n\u003cdiv\u003e\n\u003cdiv data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e\u003cspan\u003eDefined by its straight sloped roof and full-height vertical vent running from ridge to gutter. This full sawtooth opening delivers the largest ventilation area of any sawtooth type — hot air exhausts directly with no restriction — making it the most effective natural-ventilation sawtooth design for warm and hot climates.An evolved sawtooth design that replaces the straight roof slope with a single smooth arch. This curved roof distributes rain and snow loads more evenly across the frame, improving structural durability over a triangular sawtooth, while the half-height vertical vent maintains effective natural ventilation. A balanced, mid-range option — more robust than a straight-slope sawtooth, simpler than a double-arch design — well suited to medium-scale farms and regions with moderate snow and wind.\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e  \u003c!-- split --\u003e\n\u003cdiv\u003e\n\u003ch4 data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e\n\u003cstrong\u003eKey Highlights\u003c\/strong\u003e\u003cbr\u003e\n\u003c\/h4\u003e\n\u003cdiv data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e\n\u003cdiv data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e· Single smooth curved arch roof distributes snow and wind loads evenly — better structural durability than a straight-slope triangular sawtooth\u003cbr\u003e· Half sawtooth vent with curved roof airflow guidance — effective natural ventilation for moderate climates\u003cbr\u003e· Hot-dip galvanized steel frame, 275g\/m² zinc coating, 15+ year service life\u003cbr\u003e· Balanced mid-range design — more robust than triangular, simpler than double-arch — ideal for medium-scale farms\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ch4 data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e\u003cstrong\u003eProduct Overview — Curved Roof Strength, Balanced Performance\u003c\/strong\u003e\u003c\/h4\u003e\n\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv data-zone-id=\"0\" data-line-index=\"0\" data-line=\"true\"\u003e\n\u003cspan\u003eThe PONSUNO Single Half-Arch Sawtooth Greenhouse advances the original triangular sawtooth design by replacing its straight roof slope with a single, smooth curved arch running from the top of the vertical vent wall down to the gutter. This single half-arch profile gives the greenhouse its name and its defining characteristic: a curved load-bearing surface that distributes rain, snow, and wind pressure more evenly than a straight plane. The result is a structure that is more durable under snow load than a triangular sawtooth, while remaining simpler and more compact than a double-arch sawtooth.\u003c\/span\u003e\n\u003cdiv\u003e\n\u003cdiv data-zone-id=\"0\" data-line-index=\"2\" data-line=\"true\"\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eStructure \u0026amp; Materials. \u003c\/b\u003e\u003c\/span\u003eThe load-bearing frame uses hot-dip galvanized steel with a 275g\/m² zinc coating. Columns range from 50mm to 150mm diameter, sized by span and local loads. The roof arch is formed by bending steel pipe (typically 25–50mm diameter) to a single continuous curve — one end connects to the top of the vertical vent wall, the other to the gutter. Gutters are press-formed galvanized steel (1.5–2.5mm) running the full length between bays. The half sawtooth vent is operated by a rack-and-pinion or roll-film drive. All connections are bolted with galvanized hardware; no field welding required.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eStructural Performance.\u003c\/b\u003e\u003c\/span\u003e—The Curved Roof Advantage. Unlike a straight-slope triangular sawtooth, where snow accumulates and load concentrates at the ridge and gutter, the curved arch roof distributes vertical loads across the entire arch profile. This reduces peak stress at any single connection point and allows the greenhouse to achieve a higher snow load rating (typically 0.25–0.35 kN\/m²) than a triangular sawtooth of equivalent steel weight. The curved surface also sheds snow more readily — once snow begins to slide on the upper curve, gravity carries it the rest of the way down.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eVentilation. \u003c\/b\u003e\u003c\/span\u003eThe vent is classified as a \"half sawtooth\" — it does not extend the full height to the ridge, as the curved arch occupies the upper portion of the bay. The vent opening runs from the shoulder or mid-wall up to the base of the arch. While the vent area is smaller than a full sawtooth (triangular) design, the curved roof profile helps guide rising warm air toward the vent opening, maintaining good natural ventilation performance. For most moderate climates, this delivers sufficient summer cooling without mechanical assistance.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eTrade-Offs. \u003c\/b\u003e\u003c\/span\u003eTwo limitations should be noted. First, the half sawtooth vent area is smaller than a full sawtooth, so in very hot climates the natural ventilation capacity may be lower than a triangular sawtooth of the same size. Second, the single-arch profile is less aerodynamic than a double-arch design, making it better suited to regions with moderate rather than extreme wind.\u003c\/li\u003e\n\u003cli\u003e\n\u003cspan\u003e\u003cb\u003eCovering \u0026amp; Integrated Systems. \u003c\/b\u003e\u003c\/span\u003eRoof covering is standard 150–200 micron PE\/PO\/EVA film (anti-fog, anti-drip, UV-stabilized), with polycarbonate available for greater insulation. Side walls are selectable: film, polycarbonate hollow sheet, color steel sandwich panel, or glass. The structure supports the full range of add-on systems — side ventilation, internal\/external shading (30%–85%), heating, drip or spray fertigation, multi-zone environmental control, and supplemental lighting.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c!-- specs --\u003e\n\u003ctable style=\"width: 100%; border-collapse: collapse; border-spacing: 0;\"\u003e\n\u003ccolgroup\u003e \u003ccol style=\"width: 32%;\"\u003e \u003ccol style=\"width: 68%;\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; font-weight: 600; padding: 12px 16px; border-bottom: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eParameter\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd style=\"background-color: #f8f9fa; color: #111111; font-weight: 600; padding: 12px 16px; border-bottom: 1px solid #e0e0e0;\"\u003e\u003cstrong\u003eSpecification\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eStructure Type\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eSingle half-arch sawtooth greenhouse (half sawtooth)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eRoof Profile\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eSingle smooth curved arch + vertical vent wall\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eVent Type\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eHalf sawtooth vent (shoulder\/mid-wall to arch base)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eSpan Width (per span)\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e6m \/ 8m \/ 9.6m \/ 10m \/ 12m — customizable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eNumber of Spans\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e1 – 10+ spans, customizable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eTotal Covered Area\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e300 m² – 20,000 m² (scalable)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eLength\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e20m – 200m, in 3m \/ 4m \/ 5m increments\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eGutter Height\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e2.5m \/ 3.0m \/ 4.0m — customizable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eRidge Height\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e3.5m – 6.0m (varies by span and arch radius)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eBay Spacing\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e2m \/ 4m\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eMain Frame Material\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eHot-dip galvanized steel, 275g\/m² zinc coating\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eColumn Pipe Diameter\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e40mm \/ 50mm \/ 60mm \/ 80mm (per span \u0026amp; load)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eArch Pipe Diameter\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e25mm \/ 32mm \/ 40mm \/ 50mm (bent to arch profile)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eGutter\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eHot-dip galvanized steel, 1.5 – 2.0mm thick, full-length drainage\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eRoof Covering\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e150–200 micron PE \/ PO \/ EVA film; optional polycarbonate\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eSide-Wall Covering\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eFilm \/ Polycarbonate hollow sheet \/ Color steel sandwich panel \/ Glass — selectable\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eLight Transmission\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e85% – 90% (film roof, new condition)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eNatural Ventilation\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eHalf sawtooth vent + optional side vents\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eMechanical Cooling\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eOptional fan \u0026amp; pad evaporative cooling system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eShading System\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eOptional internal \/ external motorized shade net (30% – 85%)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eHeating System\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eOptional hot-water boiler \/ unit heater \/ radiant floor\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eIrrigation \u0026amp; Fertigation\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eOptional drip \/ spray \/ ebb-and-flow with automated dosing\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eEnvironmental Control\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eOptional multi-zone sensor + central controller + remote app\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eSupplemental Lighting\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eOptional LED \/ HPS grow light system\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eSnow Load Resistance\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e0.25 – 0.35 kN\/m² (curved roof sheds snow better than straight slope)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eWind Load Resistance\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eUp to 150 km\/h (reinforced options available)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eDoor\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eDouble sliding door or hinged door (1.5m × 2.5m standard)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eFoundation\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eConcrete strip foundation or independent column foundation\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eFrame Service Life\u003c\/td\u003e\n\u003ctd style=\"background-color: #ffffff; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e15 – 20 years (with proper maintenance)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd style=\"background-color: #e2f0d9; color: #111111; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003eFilm Service Life\u003c\/td\u003e\n\u003ctd style=\"background-color: #f9fafb; color: #333333; padding: 12px 16px; border-bottom: 1px solid #e0e0e0; vertical-align: middle;\"\u003e3 – 5 years (depending on film grade and climate)\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"我的商店","offers":[{"title":"Default Title","offer_id":67715172696277,"sku":null,"price":0.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0828\/1030\/6773\/files\/SingleHalf-ArchSawtoothGreenhouse-1.png?v=1792243904","url":"https:\/\/ponsuno.com\/products\/single-half-arch-sawtooth-greenhouse","provider":"PONSUNO","version":"1.0","type":"link"}