The Architect's Drawing Board
New ANSI requirements for grade 2 braille.
The ADAAG Review Federal Advisory Committee's FINAL REPORT "Recommendations for a New ADAAG", is expected to be adopted by the ADA Law in early 2000.
In this report the Committee addresses new grade 2 braille requirements for signs.
The Committee's final recommendation requires all signs containing grade 2 braille, as mandated by the ADA, to now have braille with domed or rounded tops. Flat tops on braille will no longer be ADA compliant. Additionally, the Committee has established dimensions for braille dots.
Most methods of producing grade 2 braille currently utilize technology that produces braille with flat tops and sharp edges. "Flat top" braille will no longer be compliant when the Committee's recommendations are adopted as part of the ADA Law.
Braille with rounded or domed tops have been found to be considerably easier to read by the vision impaired population, due to its shape and feel.
Two current methods of producing rounded or domed grade 2 braille that meet the Committee's recommendations are embossing and raster balls. Of these two methods only embossed grade 2 braille is an integral part of the sign.
Embossed grade 2 braille is produced by computer driven machinery that guarantees precise dimensions on each and every braille sign. The braille is embossed directly into the sign face and is not glued or pasted on as a secondary application. The embossed braille can be back filled with hardening compounds to produce solid braille dots.
Raster balls are placed into pre-drilled holes and held in place by friction fitting or gluing the raster ball into the pre-drilled holes. If the raster balls are friction fit into the sign, they are held in place only by the tolerance of the pre-drilled hole. Expansion and contraction of the sign due to environmental changes might cause the raster balls to fall from the sign. If the raster balls are glued into the sign, the possibility exists for excess glue to mar the face of the sign.
In their current state, the braille produced by many of the commonly used braille production methods will no longer be compliant when the Committee's recommendations are adopted as part of the ADA, if their braille continues to have "flat tops" and sharp edges. Theses processes include: Etching, Sand Carving and Photopolymer.
To ensure that you receive grade 2 braille that meets current and proposed ADA requirements and is an integral part of the sign, make sure to specify "Braille to be produced by embossing." on all your ADA sign specification.
The above information was taken from the ADAAG Review Federal Advisory Committee FINAL REPORT "Recommendations for a new ADAAG" and actual experiences with the above mentioned braille production processes.
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"Kama ilivyoelezwa katika makala ya ""Architect's Drawing Board: New ANSI Requirements for Grade 2 Braille""" "Kulingana na ripoti ya mwisho ya Kamati ya Ushauri ya Shirikisho ya Mapitio ya ADAG, ""Mapendekezo kwa ADAG Mpya"" yatakubaliwa na Sheria ya ADA mapema mwaka 2000." Katika ripoti hii, Kamati inazungumzia mahitaji mapya ya maandishi ya Braille ya daraja la 2 kwa ishara. "Kulingana na mapendekezo ya Kamati ya Usalama ya Amerika, ishara zote zenye maandishi ya Braille ya daraja la 2 lazima ziwe na maandishi ya Braille ya ""kupiga au pande zote.""" Vipande vya gorofa kwenye maandishi ya Braille havitakuwa tena vinavyolingana na ADA. Kwa kuongezea, Kamati hiyo imeweka vipimo vya nukta za Braille. Kwa sasa, mbinu nyingi za kutengeneza maandishi ya Braille ya daraja la pili zinatumia teknolojia inayotengeneza maandishi ya Braille yenye sehemu ya juu iliyo tambarare na kingo kali. "Flat top" Braille haitakuwa tena sambamba wakati mapendekezo ya Kamati yanapokubaliwa kama sehemu ya Sheria ya ADA. Braille yenye sehemu ya juu iliyozungukwa au iliyo na umbo la mviringo imegunduliwa kuwa rahisi zaidi kusoma na watu wenye ulemavu wa kuona, kwa sababu ya umbo na hisia yake. Njia mbili za sasa za kutengeneza maandishi ya Braille ya daraja la pili yenye umbo la mviringo au la mviringo ambazo zinakidhi mapendekezo ya Kamati ni kuchora na mipira ya raster. Kwa njia hizi mbili, Braille ya daraja la 2 tu ni sehemu muhimu ya ishara. Braille ya daraja la 2 ya kuchorwa hutengenezwa na mashine inayoendeshwa na kompyuta ambayo inahakikisha vipimo sahihi kwenye kila ishara ya Braille. Braille ni embossed moja kwa moja katika uso ishara na si glued au pasted juu kama maombi ya sekondari. Braille iliyochongwa inaweza kujazwa tena na misombo ya kuimarisha ili kutokeza nukta thabiti za braille. Raster mipira ni kuwekwa katika mashimo pre-drilled na uliofanyika katika nafasi na msuguano fitting au gluing raster mpira katika mashimo pre-drilled. Kama mipira raster ni msuguano kufaa katika ishara, wao ni uliofanyika katika nafasi tu na uvumilivu wa shimo pre-drilled. Upanuzi na contraction ya ishara kutokana na mabadiliko ya mazingira inaweza kusababisha mipira raster kuanguka kutoka ishara. Ikiwa mipira ya raster imeunganishwa kwenye ishara, kuna uwezekano wa gundi kupita kiasi kuharibu uso wa ishara. Kwa hali yao ya sasa, Braille zinazozalishwa na mbinu nyingi za uzalishaji wa Braille zinazotumiwa kwa kawaida hazitakuwa na kufuata wakati mapendekezo ya Kamati yanapopitishwa kama sehemu ya ADA, ikiwa Braille yao inaendelea kuwa na "vitu vya gorofa" na kingo kali. Hizi michakato ni pamoja na: Etching, Sand Carving na Photopolymer. "Kwa hivyo, ili kuhakikisha kwamba unapata Braille ya daraja la 2 ambayo inakidhi mahitaji ya sasa na yaliyopendekezwa ya ADA na ni sehemu muhimu ya ishara, hakikisha kutaja ""Braille itakayotengenezwa kwa kuchora.""" Kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano, kwa mfano. "Hii ni kwa sababu ya ripoti ya mwisho ya Kamati ya Ushauri ya Shirikisho ya ADAG, ""Mapendekezo ya ADAG mpya"" na uzoefu halisi na michakato ya uzalishaji wa Braille iliyotajwa hapo juu." MEMCO ni kampuni ya usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa usanifu wa Merrimack.