Recently listed Interarch Building Product’s share price increased 8% to ₹1,218.85 per share following the inauguration of phase 1 of its pre-engineered steel (PEB) plant in Attivaram, Andhra Pradesh. The new facility, with advanced technology, boosts capacity by 20,000 MT annually. The ₹95 crore project aims to expand total capacity to 2 lakh MT per year over two phases.