2 construction preparation
2.1 Materials and components and parts :
2.1.1 wooden staircase with hardwood handrail generally processed into finished goods specifications , its species , size , size, shape according to the design requirements. Wood grain quality should be straight and consistent color , without rot, knots , cracks, distortion and other defects ; moisture content of not more than 12% of elbow material commonly used handrail material, phase angle of 45 ° sections , special sections . wooden handrail elbow material prepared according to the design requirements .
2.1.2 Plastic armrests ( PVC handrail material ) Department of Chemical Plastic Products ; section form , size and color choice according to design requirements .
2.1.3 binder : You can use gelatin ( bladder ) , and more generally with polyvinyl acetate , etc. (latex ) chemical adhesives.
2.1.4 Other materials : wood screws , sandpaper wood processing accessories.
2.2 The main equipment :
2.2.1 Motors with : portable electric drill, a small table saw .
2.2.2 Hand Tools : wood saw , narrow saws ; two plane , a small plane , a small iron planing ; ax , claw hammer , flat shovel , fell steel , wood fell , screwdriver ; cubic feet, cut square, clips and so on.
2.3 Operating conditions :
2.3.1 stairwell walls, stair treads and other plastering completed.
2.3.2 installed handrails metal railing or wall fixing embedded parts .
3 Operation Process
3.1 Process:
Find a place with a crossed elbow formulated → → → fixed → renovations preloaded connections
3.2 wooden handrail :
3.2.1 find bits and crossed :
3.2.1.1 install handrails fixtures : location, elevation , slope to find the correct position , the pop-up armrest vertical centerline.
3.2.1.2 handrails constructed according to the design , according to the bending position, angle , draw bending or cutting moldings .
3.2.1.3 staircase railing fence and the top surface of the handrail to draw a straight line segment position and elbows, bend the beginning and end of the segment .
3.2.2 Elbow preparation:
3.2.2.1 fence or railing by the top surface of the slope , with a good start elbow , generally wooden handrail, handrail available material cut with elbow , using cutting angle on the seam bonding, at least within the block with a section cut consider three screws and fasteners to connect the fixed support . Greater than 70mm section of handrail fittings preparation, in addition to bonding , we must also make the following dowels or with iron riveted .
3.2.2.2 Overall elbow manufacture: spare foot bulk sample templates , and crossed with the site after checking on the elbow by a model material crossed prototype made wool ( woolen size is generally greater than the design size of about 10mm) . Press the crossed position preloaded with vertical handrail ends straight bond , making the groove below the elbow , and the railings close to flat or mount combination .
Between the prefabricated wood handrails shall be subject to pre , pre wooden handrail carried up by the next , the first connection of the first pre- start and run handrail elbow bent elbow , matched up and down bending : 3.2.3 preloaded connections straight handrail material, pre- segmented adhesive , the adhesive may not operate when the ambient temperature is below 5 ℃.
3.2.4 Fixed : Segmented pre- check and correct conduct handrail and balustrade ( railing ) on the mount , fasten with wood screws , fixed-pitch control in less than 400mm , should operate at a fixed point, the first handrail core drill hole , then screwed into the wood , not use a hammer directly into , nuts reach Euparagonimus .
3.2.5 renovation : Armrest the bend if not smooth , fine rasps filing the application level , smooth polished look to knuckle line clear , appropriate slope angle , bend naturally , consistent cross-section , the final polish wood sandpaper .
3.3 plastic armrest ( PVC handrail ) :
3.3.1 find bits and crossed : according to design requirements and matching plastic armrest material, check the supporting handrail fasteners , slope , sizes , shapes looking corner position , crossed a line to determine each corner point , the length of the line segment armrest .
3.3.2 Elbow preparation: general plastic handrails, handrail material with corner cutting preparation.
3.3.3 preloaded connections : Install plastic armrest, each run by the upper staircase handrail ( steeplechase ) , and set flat , fixed armrest slot insert material support , penetrate down from , you can make armrest trough clenched flat . Line segment coincides with the position of the upper and lower bend lines , curved mosaic cutting system demolition material phase.
3.3.4 Fixed: plastic armrest supported mainly by flat steel handrail trough insert pieces hold fixed , bending at the ends of the straight handrail sticky heat and pressure , can also be used with the armrest straight segments latex adhesive .
3.3.5 renovation : After bonding hardened , bending at hand polished wood Broacher refurbishment smooth.
4 Quality Standards
4.1 ensure that the project :
4.1.1 wood handrails and bend wood species and moisture content of the material must meet the design requirements and the " wood frame construction and acceptance of norms " (GBJ206-83) requirements.
4.1.2 Selection of plastic handrail support should match the material shape, size should meet the design requirements.
4.1.3 fixed armrests embedded parts ( wooden tiles or iron ) must be firm , not loose , into the wall of the wooden handrail should be done embalmed.
4.2 The basic items:
4.2.1 Production : Size correct , smooth, straight lines , curves, arcs along the surface , flute angle Founder, no closure Croucher , planing marks, hammer India and other defects.
4.2.2 Installation: correct position, cut moldings accurate, neat, tight joints , consistent slope, firmly bonded, smooth , nuts Euparagonimus unanimously out of the wall size.
4.2.3 Plastic handrails should be no split .
4.3 Tolerance project , see Table 9-49
Stair handrail installation tolerances Table 9-49
Item Project Tolerance (mm) inspection methods
A railing ( board ) the amount of vertical feet hanging line 2 checks
2 baluster spacing of 3 feet to check the amount of
3 armrest longitudinal bending amount of 4 -foot pull-through line inspection
4 handrail elbow and check the amount of size 3 feet
5 product protection
5.1 installing handrails, stair railings should be protected , the staircase and the operating range has finished construction projects .
5.2 wooden handrails installed, should brush a primer , friends should be added to the package, so as not to impact damage and moisture discoloration.
5.3 plastic wrapped handrails should be installed in a timely manner to protect .
6 should be noted that the quality of
6.1 lax bonding or cracking of joints : wooden handrail mainly because of high moisture content , due to shrinkage when installing handrails material after installation. After entering the armrest material should be stored in dry and ventilated library forbidden installed in damp conditions .
6.2 then hew uneven : the main handrail slotted bottom depth is inconsistent, uneven pieces railing flat or fixed positive impact on the armrest then hew ride quality.
6.3 uneven color : mainly caused by improper choice of materials .
6.4 nut uneven : mainly improper angle drilling , drilling and construction should be directed perpendicular to the flat iron or fasteners .
7 Quality Records :
This process should have the following standard quality records :
7.1 wooden handrail materials should be dried lumber grading and test data .
7.2 plastic handrails should meet product specifications for certification.
7.3 Installation quality inspection and assessment data .
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