Corrugated roof sheet .

Corrugated roof sheet hi colour-coated steel sheet a siam sheet a ni a, chu chu roll leh cold-bent a ni a, corrugated shape hrang hrangah a lut a ni. He sheet hian colour-coated steel sheet mawina leh corrosion resistance chu corrugated sheet structural strength nen a thlunzawm a, building inchung, bang, indoor leh outdoor decoration leh field dang dangah pawh hman a ni nasa hle.

1. Raw material buatsaih (raw material hrang hrang leh auxiliary material hrang hrang lei te pawh a tel):

(1) Base material - lum-rolled steel strip;

(2) Coating - aluminum-zinc alloy emaw electroplated tin-Chropper-chromium iron sheet/stainless steel surface treatment agent + PVC film

(3) Coating - epoxy resin primer + acrylic topcoat;

(4) Curing agent - epoxy diluent / polyurethane adhesive leh solvent.

2. Preforming → Thermoforming → Painting → Enfiahna → Packaging → warehousing.

Steel roofs hi industrial leh commercial building-ah chuan a chhe thei lo leh a man tlawm avangin hman a ni nasa hle a, mahse hun rei tak chhunga performance neih theih nan regular maintenance a ngai a ni. A hnuaia tarlan te hi steel roof maintenance atana ngaihtuah tur pawimawh tak tak an ni:

Routine tihfai leh enfiah .

A tihfai dan pangngai: 1.1.

Season tin vawi khat tal inchung chu enfiah la, hnah, leivut leh thil dang bawlhhlawh te chu paih chhuak rawh.

A chung chu 5% sodium hypochlorite solution hmangin silfai la, minute 20 vel dah la, chutah chuan hose hmangin flush rawh.

Gutters te hi a blockage leh tui a pun loh nan (kum khatah vawi thum tal) tifai thin ang che.

Hriselna endikna: 1.1.

Ladder-a i awm laiin point pathum (kut khat leh ke pahnih tal) contact (kut khat leh ke pahnih) vawng reng ang che.

Kal dawnin stability turin metal studs bulah ding la, a tul chuan professional hire bawk ang che.

A chhehvel boruak enkawl dan: 1.1.

Mowing the roof Remove branches near the roof to prevent leaf accumulation and algae growth. Keep trees and shrubs a sufficient distance from the roof (>3m for trees and >1.5m a ni a, thinghnah a ni).

II a ni. Anti-Corrosion enkawl dan .

Rust hmanga enkawlna:

Rust battery effect a awm loh nan rust spot hmuhchhuah atanga darkar 24 chhungin enkawl rawh.

Minor rust (a rust .<30% area): High-pressure clean, then sand. Apply an anti-rust primer (such as epoxy zinc yellow) and two coats of fluorocarbon topcoat.

Moderate rust (30%-50%): A then thlak dan tur ngaihtuah rawh. Thil hlu dahna hmunte tan thlak nghal a tha.

Severe rust (>50% emaw deformation): A thlakna kimchang a pawimawh. Plating a tha hle. Aluminum-Zinc sheet (Lifespan chu kum 8-10 chhung a awh) a ni.

Corrosion laka invenna cycle:

Coastal environments with high corrosion: Kum thum danah film thickness check thin ang che. Loss 30% aia tam a nih chuan local recoating ti rawh.

Inland dry environments: Inspection hi kum nga chhung atan pawhsei theih a ni.

Overall Renovation Cycle: Kum 8-10 chhung (a corrosion awm dan tak tak atanga siam that).

Corrosion laka invenna hmanrua thlan dan:

Epoxy zinc-rich primer (zinc content 80% aia tam emaw, a tlukpui emaw) + polyurethane topcoat hmanga composite coating system hmang ang che. Sandblast to SA 2.5, roughness 40-70μm, total dry film thickness chu 250μm aia tam emaw, a tlukpui emaw a ni.

iii a ni. Structural stability enkawl dan tur .

Weld Point enfiahna:

Weld defects te rang taka hmuh theih nan infrared thermal imaging technology hmang la, inspection efficiency chu 300% in a pung ang.

Ultrasonic flaw detectors te chuan 50mm thick steel plate te chu an lut thei a, chu chuan internal crack te chu error rate hmangin a hmuchhuak thei a ni.<0.5%.

K-groove welds te chu alternating loads neiin enfiah la, a penetration kimchang a awm theih nan.

Deformation enkawl dan: 1.1.

Kum tin ruahtui tlak hmaa key node-a displacement tehna atan total station hmang ang che.

Large-span steel structures tan chuan point khat 20m danah ±3mm dik takin enfiah thin ang che.

Steel crane beam-a mid-span deflection phal chu L/600 (L=span) a ni. He limit aia tam deflection eng pawh hian reinforcement a mamawh a ni.

Connector enfiahna: 1.1.

Kum thum danah torque tehna a ni. Wrench hmangin bolt joint te chu enfiah la, ±10% chhunga pre-tightening torque tolerance vawng reng rawh.

Microcracks te chu magnetic flaw detector hmangin hriat theih a ni a, infrared thermal imager hmangin cold bridge leak te chu a hriat theih bawk.

iv. Tui tlak lohna tur system enkawl dan tur .

Joint enkawlna: 1.1.

Ridge, eaves leh screw joint te chu gap leh rust awm leh awm loh enfiah rawh.

Sealant chhe tawh zawng zawng chu paih chhuak la, neutral silicone emaw polyurethane sealant emaw hmangin reseal rawh.

Gutter joint treatment: A tihfai zawh chuan nano-Rust remover hnawih la, chutah chuan special waterproof coating hnawih la, polyester sheeting hmangin khuh rawh.

Sealant thlak dan tur:

Color-coated steel plate leh gutter facade, drain outlet leh hmun danga crack awm leh awm loh inzawmna chu enfiah rawh.

A tifai tha hle. A bul tanna sealant chu la chhuakin cement mortar emaw modified asphalt sealant emaw hmangin seal rawh.

Sealant thar i hnawih zawh chuan 250mm wide butyl tape hmangin seal chu a tichak ang.

Tui tlak lohna tur thil thlan dan: 1.1.

Neutral silicone adhesive: Kum 15-20 chhunga khaw lum leh khaw vawt laka inven theihna, tensile strength 2.5mpa aia tam emaw, a tlukpui emaw, 40-150℃inkar temperature tan a tha

Polyurethane adhesive: elastic recovery tha tak, elongation at break at 400%, dynamic joint tan a tha.

Butyl tape: Instant adhesion, kum 5-8 chhunga khaw lum leh khaw vawt laka inven theihna, nail hole sealing atana tha.

V. Khaw lum lutuk a ni a, a rilru a buai em em bawk.

Typhoon laka invenna:

Roof slope tling tak hmang la, a thlawptu structure chu tichak rawh.

Thli-Clips emaw buckle emaw resistant emaw dah la, thli-induced lift- off a awm theih nan.

Anchor points te chu high-Risk area-ah te dah la, roof panel corner leh eaves te ang chi te.

Typhoon a lo thlen hmain exhaust pipe leh skylight ang chi penetration te chu enfiah leh tihchak a ni.

Snowstorm-a inbuatsaihna: 1.1.

Snow a punkhawm nghal a, 30 cm aia tam a ni (load warning threshold).

Steel structures chu rust a awm leh awm loh enfiah la, anti-RUST measures a hun taka kalpui rawh.

Long-span structure-ah chuan enfiahna kimchang leh vur tlak nghal vat a ngai a ni.

After a snowstorm, inspect structural deformation, especially the verticality of steel columns (deviations >3‰ siamthat ngai a ni).

VI. Professional maintenance chungchanga rawtna siam .

in-Inspection cycle thuk tak:

Kum 5 danah professional inspection nei thin ang che. In-Depth maintenance-ah hian structural inspection, material performance testing, leh system functionality testing te a tel a ni.

Repair cost ngaihtuah tur:

Kum nga-kum nga chhunga siamthat nawn lehna senso zawng zawng chu a tlangpuiin direct replacement aiin a let 1.7 in a sang zawk. Rust hniam emaw, na tak emaw tan chuan siamthat ai chuan replacement-a economic viability evaluate a tha.

In sak dan quality enkawl dan:

"Cheap repair" traps lakah fimkhur rawh: Low-Quality self-Tapping screw te hian kum hnih chhungin an rust leh perforate ngei ang. "Waterproof Coating" scams: Polyurethane coating 90% chu thla 18 hnuah chalk a ni ang.

A chunga maintenance guidelines zawm hian steel roof dam chhung hi nasa takin a ti rei thei a, chutih rualin chhiatna rapthlak tak thleng thei tur a tihziaawm thei bawk. Maintenance log kimchang tak vawn reng a tha a, a hnua enkawlna tur reference pe turin inspection leh action zawng zawng document-a ziah a tha.